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Students can Download Samacheer Kalvi 10th Social Science Model Question Paper 3 English Medium Pdf, Samacheer Kalvi 10th Social Science Model Question Papers helps you to revise the complete Tamilnadu State Board New Syllabus, helps students complete homework assignments and to score high marks in board exams.

Tamil Nadu Samacheer Kalvi 10th Social Science Model Question Paper 3 English Medium

General Instructions:

1. The question paper comprises of four parts
2. You are to attempt all the questions in each part. An internal choice of questions is provided wherever applicable.
3. All questions of Part I, II, III, and IV are to be attempted separately.
4. Question numbers 1 to 14 in Part I are Multiple Choice Questions of one mark each.
   These are to be answered by writing the correct answer along with the corresponding option code and the corresponding answer
5. Question numbers 15 to 28 in Part II are of two marks each. Any one question should be answered compulsorily.
6. Question numbers 29 to 42 in Part III are of five marks each. Any one question should be answered compulsorily.
7. Question numbers 43 to 44 in Part IV are of Eight marks each. Draw diagrams wherever necessary.

Time: 3 Hours
Maximum Marks: 100

Part – I

Answer all the questions. Choose the correct answer [14 × 1 = 14]

Question 1.
What were the three major empires shattered by the end of First World War?
(a) Germany, Austria-Hungary, and the Ottomans
(b) Germany, Austria-Hungary, and Russia
(c) Spain, Portugal and Italy
(d) Germany, Austria-Hungary, Italy
Answer:
(a) Germany, Austria-Hungary, and the Ottomans

Question 2.
Which quickened the-process of liberation in South America?
(a) Support of US
(b) Napoleonic Invasion
(c) Simon Bolivar’s involvement
(d) French Revolution
Answer:
(d) French Revolution

Question 3.
When was people’s Political consultative conference held in China?
(a) September 1959
(b) September 1948
(c) September 1954
(d) September 1949
Answer:
(d) September 1949

Question 4.
Who were driven out of their homeland during the process of creation of zamins under permanent Settlement?
(a) Santhals
(b) Titu Mir
(c) Munda
(d) Kol.
Answer:
(a) Santhals

Question 5.
Which among the following was declared as ‘Independence Day’?
(a) 26th January 1930
(b) 26th December 1929
(c) 16th June 1946
(d) 15th January 1947
Answer:
(d) 15th January 1947

Question 6.
The extent of Himalayas in the east-west is about …………………
(a) 2,500 km
(b) 2,400 km
(c) 800 km
(d) 2,200 km
Answer:
(a) 2,500 km

Question 7.
Western disturbances cause rainfall in …………………
(a) Tamil Nadu
(b) Kerala
(c) Punjab
(d) Madhya Predesh
Answer:
(c) Punjab

Question 8.
The soil formed by the river are …………………
(a) Red soils
(b) Black soils
(c) Desert soils
(d) Alluvial soils
Answer:
(d) Alluvial soils

Question 9.
Retreating monsoon wind pick up moisture from …………………
(a) Arabian sea
(b) Bay of Bengal
(c) Indian ocean
(d) Timor sea
Answer:
(b) Bay of Bengal

Question 10.
Second staple food of the people of Tamil Nadu is …………………
(a) Pulses
(b) Millets
(c) Oilseeds
(d) Rice
Answer:
(b) Millets

Question 11.
Which one of the following rights was described by Dr. B. R. Ambedkar as the heart and soul of the constitution?
(a) Right to freedom of religion
(b) Right to equality
(c) Right to constitutional remedies
(d) Right to property
Answer:
(c) Right to constitutional remedies

Question 12.
Which of the following country is not the founder member of NAM?
(a) Yugoslavia
(b) Indonesia
(c) Egypt
(d) Pakistan
Answer:
(d) Pakistan

Question 13.
………………… is the process of providing or obtaining the food necessary for health and growth.
(a) Health
(b) Nutrition
(c) Sanitation
(d) Security
Answer:
(b) Nutrition

Question 14.
Gross value added at current prices for services sector is estimated at lakh crore
in 2018-19.
(a) 91.06
(b) 92.26
(c) 80.07
(d) 98.29
Answer:
(b) 92.26

Part – II

Answer any 10 questions. Question No. 28 is compulsory. [10 x 2 = 20]

Question 15.
Access the role of Ayyankali in fighting for the cause of “Untouchables”.
Answer:
(i) Ayyankali brought tremendous social changes especially in caste structure. The discrimination he faced as a child turned him into a leader of an anti-caste movement and who later fought for basic rights including access to public spaces and entry to schools.

(ii) Ayyankali challenged many caste conventions such as clothing style, he wore clothes associated with upper castes that were prohibited for lower castes.

Question 16.
How did Hitler get the support from the people of germany?
Answer:
(i) Hitler was well aware of the discontent among the Germans. He used his oratorical skills to sway the common people and promised them to return the glorious military past of Germany. He founded the National Socialist Party, generally known as “the Nazis”.

(ii) The fundamental platform on which Hitler built his support was the notion of the racial superiority of the Germans as a pure, ‘Aryan’ race and a deep-seated hatred of the Jews. Hitler came to power in 1933 and ruled Germany for twelve long years.

Question 17.
Why was Heron dismissed from service?
Answer:

• Colonel Heron was urged to deal with Puli Thevar as he continued to defy the authority of the company. Puli Thevar wielded much influence over the western Palayakkarars.
• Heron had to abandon the plan for want of cannon and of supplies and pay to soldiers. He retired to Madurai. He was then recalled and dismissed from service.

Question 18.
Why did Gandhi withdraw the Non- cooperation Movement?
Answer:

• The Non-cooperation Movement started in 1920. It soon became a nation-wide movement because it got support of the people across the country. But in February 1922, a violent incident occurred at Chauri Chaura, a village near Gorakhpur in Uttar Pradesh.
• In this incident a procession of nationalists provoked by the police turned violent. The police finding themselves outnumbered shut themselves inside the police station.
• The mob burnt the police station in which 22 policemen lost their lives. The incident hurt Gandhiji too much and he immediately withdrew the movement.

Question 19.
What are “Jet Stream”?
Answer:
In the upper layers of the atmosphere, there are strong westerly winds concentrated in a relatively narrow and shallow streams known as “Jet streams” They cause heavy rainfall in North-west India.

Question 20.
State any two characteristics of block cotton soil.
Answer:

• This soil is rich in calcium carbonate, magnesium, potash, lime and iron but deficient in phosphorous. It is clayey and impermeable which has great capacity to retain moisture for a long time.
• It becomes sticky when wet but develops cracks during dry summer season. The soil is suited for dry farming due to its high moisture retentivity.

Question 21.
Name the tributaries of river Thamirabarani.
Answer:
Karaiyar, Servalar, Manimuthar, Gadananathi, Pachaiyar, Chittar and Ramanathi are its main tributaries.

Question 22.
List out the three leads of the relations between the centre and the states.
Answer:
There are –

• Legislative relations
• Administrative relations
• Financial relations.

Question 23.
What do you know about kaladan Multi-Model Transit Transport?
Answer:
(i) India is building the Kaladan Multi-Model Transit Transport, a road-river-port cargo transport project to link Kolkata to Sittwe in Myanmar.

(ii) A project aiming to connect Kolkata with Ho Chi Minh City on the South Sea for the formation of an economic zone will have a road pass through Myanmar, Cambodia and Vietnam and work on the first phase connecting Guwahati with Mandalay is currently underway.

Question 24.
What is national emergency?
Answer:
National emergency is a situation beyond the ordinary. The President declares this emergency if he is satisfied that India’s security is threatened due to war, external aggression or armed rebellion or if there is an imminent danger or threat.

Question 25.
How the state of Jammu and Kashmir differ from the other states of India.
Answer:

• The Constitution of India grants special status to Jammu and Kashmir among Indian States, and it is the only state in India to have a separate Constitution.
• The Directive Principles of the State Policy and Fundamental Duties of the Constitution are not applicable to the State of Jammu and Kashmir.
• Rights to property, which is denied as a Fundamental Right to rest of India is still guaranteed in Jammu and Kashmir.

Question 26.
what are the factors supporting to develop the Indian economy?
Answer:
Factors supporting to develop the Indian economy :

• A fast growing population of working age.
• India has a strong legal system and many English language speakers
• Wage costs are low here.
• India’s economy has successfully developed highly advanced and attractive clusters of business in the technology space.

Question 27.
What is the main objective of WTO?
Answer:
The main objective of WTO is to set and enforce rules for international trade and to provide a forum for negotiating and monitoring further trade liberalisations.

Question 28.
Name the important multipurpose projects of Tamil Nadu.
Answer:
Mettur Dam, Amaravathi Dam, Papanasam Dam, Bhavani Sagar Dam.

Part – III

Answer any 10 questions. Question No. 42 is compulsory. [10 x 5 = 50]

Question 29.
Fill in the blanks:
(i) ………………… treaty signed on February 7, 1922 created the EU.
(ii) The riverine island of Srirangam is located between …………………and ………………… branches of Cauvery.
(iii) …………………was India’s policy in the face of the bipolar order of the cold war.
(iv) In the year ………………… National Food Security Act was passed by the Indian Parliament.
(v) Tamil Nadu ranks …………………in India with a share of over 20% in total road projects under
operation in the Public Private Partnership (PPP).
Answers
(i) The Maastricht
(ii) Northern, Southern
(iii) Non-Alignment
(iv) 2013
(v) Second

Question 30.
Match the following:

Answers:

Question 31.
Match the following:

Answers:

Question 32.
(a) Distinguish between
(i) North East Monsoon and South West Monsoon
(ii) Rabi and Kharif Crop Season
Answer:
(a) (i) North East Monsoon and South East Monsoon:
North East Monsoon :

1. North east monsoon occurs between October and December.
2. It is Winter Monsoon.
3. The coromandal coast of Tamil Nadu gets, heavy rainfall from north east monsoon.

South West Monsoon :

1. Southwest Monsoon occurs between June to September.
2. It is Summer Monsoon.
3. The districts of Nilgiris, Kanyakumari, Salem, Coimbatore and Erode get rainfall.

(ii) Rabi and Kharif crop season:
Rabi Crop Season :

1. Rabi crops are sown in the beginning of the winter (i.e.) in November.
2. The crops are harvested in the beginning of summer (i.e) in March. days of November.
3. Major crops are wheat, tobacco, mustard, pulses, linseed and grains.

Kharif Crop Season :

1. Kharif crops are sown in the beginning of monsoon (i.e.) in June.
2. The crops are harvested in the early
3. Major crops are paddy, maize, cotton, millets, jute and sugarcane.

(b) Give reason: Alluvial soil is fertile
Answer:
Alluvial soil are formed by the deposition of silt by the rivers. Alluvial soils are generally fertile as they are rich in minerals such as lime, potassium, magnesium, nitrogen and phosphoric acid. It is deficient in nitrogen and humus. It is porous and loamy.

Question 33.
Discuss the main causes of the First World War.
Answer:
The causes of the First World War are given below:

• Formation of European alliances and counter alliances
• Emergence of violent forms of nationalism in countries like England, France and Germany
• Aggressive attitude of the German Emperor Kaiser Wilhelm II
• Hostility of France towards Germany
• Opportunity for imperial power politics in the Balkans
• The Balkans wars
• Immediate cause which included the assassination of Archduke Franz Ferdinand,nephew and heir to Franz Joseph, Emperor of Austria-Hungary, by Princip, a Bosnian Serb, on 28 June 1914.

Question 34.
Discuss the causes and consequences of the Revolt of 1857?
Answer:
The Great Rebellion of 1857 is a unique example of resistance to the British authorities, in India. There were several reasons that triggered the Revolt:

(i) The annexation policy of British India created dissatisfaction among the native rulers. The British claimed themselves as paramount, exercising supreme authority. New territories were annexed on the grounds that the native rulers were corrupt, and inept.

(ii) The British annexed several territories such as Satara, Sambalpur, parts of Punjab, Jhansi and Nagpur through the Doctrine of Lapse. This also angered many Indian rulers.

(iii) Indian sepoys were upset with discrimination in salary and promotion. They were paid much less than their European counterparts. They felt humiliated and racially abused by their seniors.

Consequences:

• India was pronounced as one of the many crown colonies to be directly governed by the Parliament. This resulted in the transfer of power from the East India company to the British crown.
• Queen Victoria proclaimed to the Indian people that the British government would not interfere in traditional institutions and religious matters. It was promised that Indians would be absorbed in government services.
• There came significant changes in the Indian army. The number of Indians was reduced. Indians were restrained from holding important ranks and position.
• It was also decided that instead of recruiting soldiers from Rajputs, Brahmins and North Indian Muslims, more soldiers would be recruited from the Gorkhas, Sikhs and Pathans.

Question 35.
Bring out the characteristics of Intensive and Plantation farming.
Answer:
Intensive farming:

• It involves various types of agriculture with higher levels of input, such as capital and labour, per unit of agricultural land area.
• It aims to maximize yields from available land through various means, such as heavy use of pesticides and chemical fertilizers. ,
• Intensive farming is practiced in Punjab, parts of Rajasthan, Uttar Pradesh, and Madhya Pradesh in India.

Plantation farming:

• It is a single crop farming, practised on a large area.
• Crops are mainly grown for the market.
• It is both labour intensive and capital intensive.
• It has an interface of agriculture and industry.
• Developed network of transport and communication connecting the plantation processing industries and markets play an important role in the development of plants. Example- tea, coffee, rubber, sugarcane, etc.

Question 36.
Write an account on river Cauvery.
Answer:

• The main river of Tamil Nadu is Cauvery which originates at Talacauvery in the Brahmragiri hills of Kodagu (Coorg) district of Karnataka in the Western Ghats.
• About 416 km of its course falls in Tamil Nadu. It serves as the boundary between Karnataka
  and Tamil Nadu for a distance of 64 km. A tributary called Bhavani joins Cauvery on the right bank about 45 km from the Mettur Reservoir.
• Thereafter, it takes easterly course to enter into the plains of Tamil Nadu. Cauvery and its distributaries in its lower course drain the districts of Nagapattinam, Thanjavur, Thivarur and Thiruchirapalli.
• The Cauvery, Kollidam and the vellar jointly drain central part of the Tamil Nadu. The head of the Cauvery delta is near the islands of Srirangam. Kollidam branches off from cauvery at Grand Anaicut, also called as Kallanai was built across the river Cauvery.
• After Kallanai, the river breaks into a large number of distributaries and forms a network all over the delta. The network of tributaries within the delta of cauvery in the coast is called as the ‘Garden of Southern India’.
• It merges into Bay of Bengal to the south of Cuddalore. Cauvery along with its tributaries Bhavani, Noyyal, Mayar and Amaravathi is the most important source of canal irrigation.

Question 37.
Write briefly on the Right to Constitutional Remedies.
Answer:
(i) Our Constitution guarantees six Fundamental Rights to its citizens. It safeguards all these rights by granting us the Right to Constitutional Remedies. It is possible that the Government or private bodies may violate one of our Fundamental Rights.

(ii) Right to Constitutional Remedies protects us from such violations. It allows us to file a case against the Government or private bodies in the High Courts of the States and the Supreme Court of the India.

(iii) Both the Supreme Court and High Courts are empowered to issue five kinds of writs of habeas corpus, mandamus, prohibition two warrants and certiorari to protect the Fundamental Rights of the citizens. That is why the Supreme Court is called the “Guardian of the Constitutions”.

Question 38.
Briefly discuss the Functions of the State Legislature.
Answer:
The powers and functions of the State Legislature are almost the same as that of the Parliament.

• The State Legislature can pass laws on all subjects mentioned in the State List as per the constitutions. It can also pass laws on concurrent subjects.
• The Legislature controls the finances of the State. The Lower House enjoys greater power than the Upper House in money matters. Money Bills can be introduced only in the Lower House of the Assembly.
• The Legislature controls the Executive. The council of Ministers is responsible to the Assembly. The ministers have to answer questions asked by the members of the Legislature.
• The Council cannot vote for grants.
• No new tax can be levied without the sanction and permission of the Assembly.

Question 39.
Briefly explain the evolution of M[NC and its advantages and disadvantages.
Answer:
Multinational companies first started their activities in the extractive industries and controlled raw materials in the host countries during 1920s and then entered the manufacturing and service sectors after 1950s. Most of the MNCs at present belong to the four major exporting countries i.e., USA, UK, France and Germany. However, the largest is America. In 1971, the American Corporations held 52% of the total world stock of foreign direct inverstment.
Great Britain held 14.5% followed by France 5% and Federal Republic of Germany 4.4% and Japan 2.7%.

Advantages of MNCs:

• MNCs produce the same quality of goods at lower cost and without transaction cost.
• They reduce prices and increase the purchasing power of consumers world wide.
• They are able to take advantage of tax variation.
• They spur job growth in the local economy.

Disdvantages of MNCs:

(i) They have led to the downfall of smaller, local business.

(ii) With more companies transferring offices and centering operations in other countries, jobs for the people living in developed countries are threatened.

(iii) MNCs often invest in developing countries where they can take advantage of cheaper labour. Some MNCs prefer to put up branches in these parts of the world where there are no stringent policies in labour and where people need jobs because these MNCs can demand for cheaper labour and lesser healthcare benefits.

Question 40.
Write a note on history of industrialisation in Tamil Nadu.
Answer:

Industrialisation in the Colonial Period:

• The introduction of cotton cultivation in western and southern Tamil Nadu by the colonial government led to the emergence of a large-scale textile sector in these parts, which involved ginning, pressing, spinning and weaving operations.
• Introduction of railways also expanded the market for cotton yam and helped develop the sector.
• There was increase in trade during this period which led to industrial development. The two active ports in the region were Chennai and Tuticorin.
• In Western Tamil Nadu, the emergence of textiles industries also led to demand and starting of textile machinery industry in the region.

Post-Independence to early 1990s:

• After independence, several large enterprises were set up by both the central and state governments.
• The Integral Coach Factory in Chennai made railway coaches and the Bharat Heavy Electricals Limited (BHEL) in Tiruchirapalli manufactured boilers and turbines.
• Ashok Motors and Standard Motors together helped form an automobile cluster in the Chennai region.
• The 1970s and 1980s saw the setting up of emergence of powerloom weaving clusters in the Coimbatore region as well as expansion of cotton knitwear cluster in Tiruppur and home furnishings cluster in Karur.
• The Hosur industrial cluster is a successful case of how such policy efforts to promote industrial estates helped develop industries in a backward region.

Industrialisation in Tamil Nadu – Liberalization Phase:

• The final phase of industrialisation is the post-reforms period since the early 1990s.
• Because of trade liberalisation measures, exports of textiles, home furnishings and leather products began to grow rapidly.
• Efforts to attract investments led to entry of leading multinational firms (MNCs) into the state, especially in the automobile sector.
• Chennai region also emerged as a hub for electronics industry with MNCs such as Nokia, Foxconn, Samsung and Flextronics opening plants on the city’s outskirts.
• A significant share of these investments has come up in special economic zones in the districts bordering Chennai.
• The major industries are automobiles, autocomponents, light and heavy engineering, machinery, cotton, etc.
• This diffused process of industrialisation and corresponding urbanisation has paved the way for better rural-urban linkages in Tamil Nadu than in most other states.

Question 41.
Draw a time line for the following:
Write any five important events between 1905-1920
Answer:

Question 42.
Mark the following places on the world map.
(i) Portugal
(ii) Spain
(iii) Morocco
(iv) France
(v) Great Britian
Answer:

Part – IV

Answer both questions. [2 x 8 = 16]

Question 43.
(a) Battle of Stalingrad
(i) When did Germany attack Stalingrad?
(ii) What were the main manufactures of Stalingrad?
(iii) What was the name of the plan formulated by Hitler to attack Stalingrad?
(iv) What is the significance of the Battle of Stalingrad?
Answer:
(a) Battle of Stalingrad:
(i) In August 1942, Germany attacked Stalingrad.
(ii) The main manufactures of Stalingrad were armaments and tractors.
(iii) Fall Blau or Operation Blue
(iv) The people of Russia were grateful for Stalin’s conduct of the war. They regarded him as ‘a prodigy of patience, tenacity and vigilance, almost omnipresent, almost omniscient.’

(b) Political developments in South America.
(i) By which year did the whole of South America become free from European domination?
(ii) How many republics came into being from the Central America?
(iii) In which year was Cuba occupied by the USA?
(iv) What made oligarchic regimes unpopular in South America?
Answer:
(b) Political developments in South America:
(i) By 1830 the whole of South America was free from European domination.
(ii) Five republics came into being from the Central America.
(iii) The USA occupied Cuba in the year 1898.
(iv) Economic growth, urbanisation and industrial growth in countries like Argentina, Chile, Brazil, and Mexico helped consolidate the hold of middle class and the emergence of militant working class oganisations. At the same time American power and wealth came to dominate Central and South America. These factors made olgarchic regimes unpopular in South America.

[OR]

(c) Gandhi and Mass nationalism.
(i) Which incident is considered a turning point in the life of Gandhi?
(ii) Name the works that influenced Gandhi?
(iii) How did Gandhi use satyagraha as a strategy in South Africa?
(iv) What do you know about the Champaran Satyagraha?
Answer:
(c) Gandhi and Mass nationalism:
(i) On his journey from Durban to Pretoria, at the Pietermaritzburg railway station, he was physically thrown out of the first class compartment in which he was travelling despite having a first class ticket. This incident is considered a turning point in the life of Gandhi.
(ii) Tolstoy’s The Kingdom of God is Within You, Ruskin’s Unto This Last and Thoreau’s Civil Disobedience.
(iii) Gandhi developed satyagraha (truth-force) as a strategy, in which campaigners went on peaceful marches and presented themselves for arrest in protest against unjust laws.
(iv) The Champaran Satyagraha of 1916 was the first satyagraha movement inspired by Gandhi. It was a farmer’s uprising that took place in Champaran district of Bihar, India during the British colonial period.

(d) Periyar E. V. R.
(i) When did Periyar found Dravidar Kazhagam?
(ii) What were the Newspapers and Journals run by Periyar?
(iii) Why was Periyar known as Vaikom hero?
(iv) Which was the most important work of Periyar?
Answer:
(d) Periyar E. V. R.
(i) Periyar found Dravidar Kazhagam in 1944.
(ii) The newspapers and journals started by Periyar were – Kudi Arasu, Revolt, Puratchi, Paguththarivu and Viduthalai.
(iii) In Vaikom, people protested against the practice of no access to the temples by the lower caste people. After the local leaders were arrested Periyar led the Temple Entry Movement and was imprisoned. So, people hailed him as Vaikom Virar or hero of Vaikom.
(iv) Right from 1929, when the Self-respect Conferences began to voice its concern over the plight of women, Periyar had been emphasising women’s right to divorce and property. Periyar’s most important work on this subject is Why the Woman is Enslaved.

Question 44.
Mark the following places on the given outline map of India.
(i) Himalayas
(ii) Nilgiris
(iii) Narmada
(iv) Lakshadweep
(v) Deccan Plateau
(vi) Southwest Monsoon
(vii) Paddy growing area
(viii) Chennai to Mumbai air route
Answer:

[OR]

Mark the following places are given outline map of Tamil Nadu:
(i) Coromandel coast
(ii) Paddy growing area
(iii) Nilgiri Hills
(iv) Nagapattinam
(v) Meenambakkam
(vi) Thamirabarani
(vii) Magnesite region (any one place)
(viii) Vaigai Dam
Answer:

Map for Q. 42
(i) Portugal
(ii) Spain
(iii) Morocco
(iv) France
(v) Great Britain
Answer:

Map for Q. 44
(i) Himalayas
(ii) Nilgiris
(if) Narmada
(iv) Lakshadwccp
(v) Deccan Plateau
(vi) Southwest Monsoon
(vii) Paddy growing area
(viii) Chennai to Mumbai air route
Answer:

Map for Q. 44
(i) Coromandel coast
(ii) Paddy growing area
(iii) Nilgiri Hills
(iv) Nagapattinam
(v) Meenambakkam
(vi) Thamirabarani
(vii) Magnesite region (any one place)
(viii) Vaigai Dam
Answer:

Students can Download Samacheer Kalvi 10th Social Science Model Question Paper 2 English Medium Pdf, Samacheer Kalvi 10th Social Science Model Question Papers helps you to revise the complete Tamilnadu State Board New Syllabus, helps students complete homework assignments and to score high marks in board exams.

Tamil Nadu Samacheer Kalvi 10th Social Science Model Question Paper 2 English Medium

General Instructions:

1. The question paper comprises of four parts
2. You are to attempt all the questions in each part. An internal choice of questions is provided wherever applicable.
3. All questions of Part I, II, III, and IV are to be attempted separately.
4. Question numbers 1 to 14 in Part I are Multiple Choice Questions of one mark each.
   These are to be answered by writing the correct answer along with the corresponding option code and the corresponding answer
5. Question numbers 15 to 28 in Part II are of two marks each. Any one question should be answered compulsorily.
6. Question numbers 29 to 42 in Part III are of five marks each. Any one question should be answered compulsorily.
7. Question numbers 43 to 44 in Part IV are of Eight marks each. Draw diagrams wherever necessary.

Time: 3 Hours
Maximum Marks: 100

Part – I

Answer all the questions. Choose the correct answer [14 × 1 = 14]

Question 1.
What is the Battle of Marne remembered for?
(a) Air warfare
(b) Trench warfare
(c) Submarine warfare
(d) Ship warfare
Answer:
(b) Trench warfare

Question 2.
With whom of the following was the Lateran Treaty signed by Italy?
(a) Germany
(b) Russia
(c) Pope
(d) Spain
Answer:
(c) Pope

Question 3.
The United States and European allies formed to resist any Soviet aggression in
Europe.
(a) SEATO
(b) NATO
(c) SENTO
(d) Warsaw Pact
Answer:
(b) NATO

Question 4.
Find out the militant nationalist from the following.
(a) Dadabhai Naoroji
(b) Justice Govind Ranade
(c) Bipin Chandra Pal
(d) Romesh Chandra
Answer:
(c) Bipin Chandra Pal

Question 5.
When was the first forest Act enacted?
(a) 1858
(b) 1911
(c) 1865
(d) 1936
Answer:
(c) 1865

Question 6.
…………………………. River is known as “Sorrow of Bihar”.
(a) Narmada
(b) Godavari
(c) Kosi
(d) Damodar
Answer:
(c) Kosi

Question 7.
………………………….  helps in quick, ripening of mangoes along the coast of Kerala and Karnataka.
(a) Loo
(b) Nor wester
(c) Mango showers
(d) Jet stream
Answer:
(c) Mango showers

Question 8.
Which crop is called as “Golden fibre” in India?
(a) cotton
(b) Wheat
(c) Jute
(d) Tobacco
Answer:
(c) Jute

Question 9.
Which of the following district is affected by sand dunes to a large extent?
(a) Theni
(b) Madurai
(c) Thanjavur
(d) Ramanathapuram
Answer:
(d) Ramanathapuram

Question 10.
The transport useful in the inaccessible area is ………………………….
(a) Roadways
(b) Railways
(c) Airways
(d) Waterways
Answer:
(c) Airways

Question 11.
How can the fundamental Rights be suspended?
(a) If the supreme court so desires
(b) If the Prime Minister orders to this effect
(c) If the President orders it during the national emergency
(d) All of the above
Answer:
(c) If the President orders it during the national emergency

Question 12.
Find the odd one ………………………….
(a) Social welfare
(b) Health care
(c) Diplomacy
(d) Domestic affairs
Answer:
(c) Diplomacy

Question 13.
…………………………. status is one of the indicators of the overall well-being of population and human resources development.
(a) Health
(b) Nutritional
(c) Economic
(d) Wealth
Answer:
(a) Health

Question 14.
Which one is a trade policy?
(a) irrigation policy
(b) import and export policy
(c) Land-reform policy
(d) Wage policy
Answer:
(b) import and export policy

Part – II

Answer any 10 questions. Question No. 28 is compulsory. [10 x 2 = 20]

Question 15.
Write a note on reforms of Ramalinga Adigal.
Answer:
(i) Ramalinga swamigal emphasised the bonds of responsibility and compassion between living beings. He expressed the view that those who lack compassion for suffering of human beings are hard hearted, their wisdom clonded. He showed his compassion and mercy on all living beings including plants.

(ii) He established the Samarasa Vedha Sanmarga Sangam in 1865 and it was renamed in 1872 as ‘Samarasa Suddha Sanmarga Sathya Sangam’ which means ‘Society for pure truth in universal self-hood’. Ramalinga also estabilished a free feeding house for everyone.

Question 16.
Describe the Pearl Harbour incident.
Answer:
(i) Pearl Harbour incident took place in December 1941 when Japan attacked American naval installations in Pearl Harbour, Hawaii, without warning to cripple America’s Pacific fleet. Many battle ships and numerous fighter planes were destroyed.

(ii) The US declared war on Japan, with Britain and China. This brought together both the Asia Pacific and the European war into one common cause. Most importantly, it brought the United States with its enormous resources into the war as a part of the Allies.

Question 17.
What was the significance of the Battle of Kalakadu?
Answer:
In the Battle of Kalakadu, Mahfuzkhan’s troops were routed by the huge forces of Puli Thevar.

Question 18.
Write a note on the Khilafat Movement.
Answer:

• After World War I, the Caliph of Turkey, who was considered the head of Muslims all over the world, was given a very harsh treatment. The Khilafat Movement started in support of the Caliph.
• It was led by Maulana Mohamed Ali and Maulana Shaukat Ali, popularly known as the Ali brothers.
• It aimed to restore the prestige and power of the Caliphate. Mahatma Gandhi supported the movement and saw it an opportunity to unite the Hindus and the Muslims.

Question 19.
Define ‘Meteorology’.
Answer:
The branch of science concerned with the processes and phenomena of the atmosphere, especially as a means of forecasting the weather.

Question 20.
Name the types of soil found in India.
Answer:

1. Alluvial Soils
2. Black soils
3. Red soils
4. Laterite soils
5. Forest and mountain soils
6. Arid and desert soils
7. Saline and alkaline soils
8. Peaty and marshy soils.

Question 21.
Name the important oil producing regions of India.
Answer:
Oil in India is obtained from both from on-shore and off-shore areas.
Western Coast off shore oil fields:

1. Mumbai high oil fields
2. Gujarat Coast
3. Basseim oil field, South of Mumbai high
4. Ankleshwar
5. Cambay-Luni Region
6. Ahemedabad-Kalol Region
7. Aliabet oil feild, south of Bhavanagar

Eastern Coast off shore oil fields:

1. Brahmaputra valley
2. Digboi oil fields
3. Nahoratiya oil fields
4. Moran-Hugrijan oil fields
5. Rudrasagar-Lawa oil fields
6. Surrma valley
7. Offshore of Andaman and Nicobar, Gulf of Mannar, Baleshwar coast, Punjab, Haryana and Uttar Pradesh.

Question 22.
What is national emergency?
Answer:
National emergency is a situation beyond the ordinary. The President declares this emergency if he is satisfied that India’s security is threatened due to war, external aggression or armed rebellion or if there is an imminent danger or threat.

Question 23.
Mention the member countries of BRICS.
Answer:

• Brazil
• Russia
• India
• China
• South Africa

Question 24.
Write any five principles of Fair Trade Practices.
Answer:
Five principles of Fair trade practices:

• Creating opportunities for economically disadvantaged producers.
• Transforming and accountability.
• Fair trading practices and payment of fair price.
• Ensuring no child labour and forced labour.
• Respect for the environment.

Question 25.
Define food security according to FAO.
Answer:
The United Nation’s Food and Agriculture Organisation defines food security as follows: “Food security exists when all people, at all times, have physical, social and economic access to sufficient, safe and nutritious food which meets their dietary needs and food preferences for an active and healthy life.” (FAO, 2009)

Question 26.
What are the effects of Green Revolution?
Answer:

• It increase the production and cultivation
• It increase the productivity
• Changes in cropping system
• Industrial development

Question 27.
Why is Coimbatore called the Manchester of Tamil Nadu?
Answer:
Maximum units are concentrated in and around Coimbatore region. For this region it is known as the “Manchester of South India”. It is known as such because of presence of more than 25,000 small, medium, large scale industries and textile mills.

Question 28.
What was the reason for India to choose the path of Non-Alignment?
Answer:

• The new nations that got independence after the long period of colonial struggle found themselves in a very difficult situation with respect to economic development.
• So it was necessary to align with either of the blocs – United States of America (USA) or United Soviet Socialist Republic (USSR).
• Nehru, India’s first Prime Minister, was opposed to the rivalry of the two superpowers (America and Russia). So he chose the path of Non-Alignment.

Part – III

Answer any 10 questions. Question No. 42 is compulsory. [10 x 5 = 50]

Question 29.
Fill in the blanks
(i) …………………………. was the headquarters of the Council of Europe.
(ii) …………………………. is the highest peak in the southern most part of the Eastern Ghats.
(iii) …………………………. is the instrument for implementing foreign policy of a state.
(iv) …………………………. is an important indicator of nutrition deficiency.
(v) Sathanur dam is constructed across the river ………………………….
Answers
(i) Strasbourg
(ii) Solaikaradu
(iii) Diplomacy
(iv) Underweight
(v) Thenpennai.

Question 30.
Match the following:

Answer

Question 31.
Match the following:

Answer

Question 32.
(a) Distinguish between
(i) Western Coastal Plains and Eastern Coastal Plains
(ii) Marine Fishing and Inland Fishing
Answer:
(a) (i) Western Coastal Plains and Eastern Coastal Plains:

Western Coastal Plains :

1. It lies between the Western Ghats and Arabian Sea.
2. It is a narrow plain, which stretches from Gujarat to Kerala with an average width of 50 – 80 Km.
3. This plain is drained by less rivers like Narmada and Tapti forming estuaries.
4. It consists of three sections. The northern part of the coast is called the Konkan (Mumbai – Goa), the
5. Central stretch is called the Kannad plain while the southern stretch is referred to as the Malabar coast.

Eastern Coastal Plains:

1. It lies between the Eastern Ghats and Bay of Bengal Sea.
2. They are wide and level plains with an average width of 80 – 100 Km.
3. This plain is drained by more rivers forming deltas like Mahanadi, Godavari, Krishna and Kaveri.
4. It consists of two sections. In the northern part, it is referred to as the Northern Circar, while the southern part is known as the Coromandal coast.
5. Lake Chilka is an important feature along the eastern coast.

(ii) Marine Fishing and Inland Fishing:
Marine Fishing :

1. It includes coastal off-shore and deep sea fisheries mainly on the continent shelf.
2. Kerala leads in the marine fish production in India.

Inland Fishing :

1. Rivers, lakes, canals, reservoirs, ponds, tanks etc.
2. Andhra Pradesh is the leading producer in India.

(b) Give reason: Western Coastal plain is narrow.
Answer:

• It lies between the Western Ghats and Arabian Sea.
• It is a narrow plain, which stretches from Gujarat to Kerala with an average width of 50-80 km.
• It is mainly characterised by sandy beaches, coastal sand dunes, mud flats, lagoons, estuary, laterite platforms and residual hills.

Question 33.
Attempt an essay on the rise and fall of Adolf Hitler.
Hitler was great orator. He swayed the people by his impassioned speeches, promising a return to the glorious military past of Germany. He founded the National Socialist Party, known as ‘the Nazis’.

He came to power in 1933 and ruled Germany till 1945, with a small group of fanatic followers. He rearmed Germany. He made huge expenditure on the recruitment of armed forces and the manufacture of armaments and machinery for the army, navy and air force. Soon the economic condition of Germany got strengthened and the problem of unemployment came to an end. In 1938, Hitler invaded Austria and Czechoslovakia.

Sudetenland in Czechoslovakia was German-speaking, and Hitler’s claim was that the German-speaking people should be united in one nation. Though Hitler gave an assurance in the Munich Pact that Germany would not attack any other country, but this was broken immediately. In 1939, he invaded Czechoslovakia.

Poland was attacked next, and this was the final act which resulted in declaration of war by Britain and France against Germany. In June 1940, Italy joined Germany, and in September 1940, Japan also joined the Axis Powers.

The German army followed a tactic of ‘lightning strike’ to storm into various countries and overrun them. In June 1941, German army invaded Russia and remained successful in the initial years. But ultimately got defeated due to the resistance by Soviet army, and the fierce Russian winter.

In the Battle of Alamein 1942, the Allied forces counter-attacked and defeated the German and Italian forces in North Africa. The German army was chased across the desert, out of North Africa. The war continued till Hitler’s suicide in April 1945.

Question 34.
Discuss the reasons behind the partition of India.
While the Indian National Congress was calling for Britain to quit India, in 1943, the Muslim League passed a resolution demanding the British to divide and quit. There were several reasons for the separate Muslim homeland in the sub-continent:

• As colonizers, the British had followed a divide-and-rule policy in India. In the census they categorized people according to religion and viewed and treated them as separate from each other.
• The British based their knowledge of the people of India on religious texts and the intrinsic differences they found in them, instead of examining how people of different religions coexisted.
• As soon as the Muslim League was formed, Muslims were placed on a separate electorate.
  Thus, the separateness of Muslims in India was built into the Indian electoral process.
• There was also an ideological divide between the Muslims and the Hindus of India. While there were strong feelings of nationalism in India, by the late 19th century there were also communal conflicts and movements in the country that were based on religious identities rather than class or regional ones.
• Both Hindu Mahasabha and Muslim League claimed that the interests of the Hindus and Muslims were different and hostile to each other.
• The British policy of divide and rule, through measures such as Partition of Bengal, Communal Award, had encouraged the vested interests out to exploit the religious differences.

Question 35.
State the types of soil in India and explain the characteristics and distribution of soil.
Answer:

Question 36.
Describe the nature of the plateau region of Tamil Nadu.
Answer:

• Plateau of Tamil Nadu are located between the Western Ghats and the Eastern Ghats.
• It is roughly triangular in shape and covers an area of about 60,000 sq. km. .
• Its height increases from east to west. Its height ranges between 150 and 600 m.
• This plateau is broader in the north and very narrow in the south and it has many subdivisions.
• Bharamahal plateau is a part of the Mysore plateau situated in the northwestern part of Tamil Nadu. Dharmapuri and Krishnagiri districts are located in this region.
• Coimbatore plateau lies between the Nilgiris and Dharmapuri districts. Its height varies from 150 to 450 metres. Moyar river separates this plateau from the Mysore plateau.
• Rivers like Bhavani, Noyyal and Amaravathi, which originate from Western Ghats form Valleys in the region. Many intermontane plateaus are found in the region of the Nilgiris. Sigur plateau is one such plateau.
• Madurai plateau found in madurai district extends up to the foothills of the Western Ghats. Vaigai and Thamirabarani basins are located in the zone.

Question 37.
Point out the fundamental Rights.
The Fundamental Rights are enshrined in Part III of the Constitution from Articles 12 to 35. There are six Fundamental Rights –

• Right to Equality It provides equality before law. It prohibits discrimination on grounds of religion, race, caste, sex or place of birth. It abolishes untouchability.
• Right to Freedom It provides freedom of speech and expression, assembly, association, movement, residence and profession.
• Right against Exploitation It prohibits trafficking in human beings and forced labour. It also prohibits employment of children in factories, etc.
• Right to religion It gives freedom of conscience and free profession practice and propagations of religion. ,
• Cultural and Educational rights It gives protection of language, script and culture of minorities. It also gives minorities the right to establish and administer educational institutions.
• Right to Constitutional Remedies It allows individuals to seek redressal for the violation of their Fundamental Rights.

Question 38.
Make a list on basic concepts followed by India to maintain friendly relations with its neighbours.
Answer:

• Indian foreign policy has always regarded the concept of neighbourhood as one of widening concentric circles, around the central axis of historical and cultural commonalties.
• India gives political and diplomatic priority to her immediate neighbours and the Indian Ocean Island states such as Maldives. ,
• India provides neighbours with support as needed in this form of resources equipment and training.

Question 39.
Explain various terms associated with measuring of national income.
Answer:
Various terms associated with measuring of national income.

(i) Gross National Product or GNP is the total value of goods and services produced and income received in a year by domestic residents of a country. It excludes profits earned from capital invested abroad.

(ii) Gross Domestic Product or GDP is the total value of output of goods and services produced by the factors of production within the geographical boundaries of the country.

(iii) Net National Product or NNP refers to gross national product, i.e., the total market value of all final goods and services produced by the factors of productions of a country or other polity during a given time period, minus depreciation.

(iv) Net Domestic Product or NDP is a part of Gross Domestic Product. It is obtained from the Gross Domestic Product by deducting the Quantum of the wear and tear expenses (depreciation).
NDP = GDP – Depreciation

(v) Per .Capita Income or PCI is an indicator to show the living standard of people in a country.
It is obtained by dividing the National Income by the population of a country.
National Income
Per Capita Income = \(\frac{\text { National Income }}{\text { Population }}\)

(vi) Personal Income or PI is the total money income received by individuals and households of a country from all possible services before direct taxes. Personal income can be expressed as follows:
PI = NI Corporate Income Taxes – Undistributed Corporate Profits – Social Security Contributions + Transfer payment.

(vii) Disposable Income or DI means actual income which can be spent on consumption by individuals and families. It can be expressed as DPI = PI – Direct Taxes.

Question 40.
Write in detail about the types of policies adopted by the Tamil Nadu government to industrialise?
Industrial Policy of Tamil Nadu:
Tamil Nadu enjoys growth and has excellent infrastructure. A straggly established cluster and political stability are the major advantages. The state government has a pro-active industrial policy and is very encouraging when it comes to SEZs.
Important industrial policies:

• Tamil Nadu Industrial Policy – 2014
• Implementation of Industrial Policy – 2015
• Tamilnadu State Environmental Policy – 2014
• Tamilnadu SEZs Policy -2013
• Tamilnadu Automobiles and Auto Parts Policy – 2014 (/) Tamilnadu Biotechnology Policies – 2014

Question 41.
Draw a time line for the following:
live important events between 1922-1943
Answer:

Question 42.
Mark the following places on the world map.
(i) Bosnia
(ii) Romania
(iii) Serbia
(iv) Bulgaria
(v) Turkey

Part – IV

Answer both questions. [2 x 8 = 16]

Question 43.
(a) Balkan Wars
(i) Why was Balkan league formed?
(ii) What was the outcome of the first Balkan war?
(iii) Who were defeated in this war?
(iv) What was the name of the Treaty signed at the end of this second Balkan war?
Answer:
(a) Balkan Wars
(i) Balkan League was formed to attack and defeat Turkish forces in the first Balkan War in 1912-13.
(ii) The new state of Albania was created and the other Balkan states divided up Macedonia between them. Turkey was reduced to the area around Constantinople.
(iii) The Turkish forces were defeated in the first Balkan War.
(iv) The name of the Treaty signed at the end of the second Balkan War was the Treaty of Bucharest.

(b) Deccan Riots
(i) When and where did the first recorded incident of rioting against the moneylenders in the Deccan appear?
(ii) What was the right given to moneylenders under a new law of the British?
(iii) What did it result in?
(iv) Against whom was the violence directed in the Deccan riots.
Answer:
(b) Deccan Riots
(i) The first recorded incident of rioting against the moneylenders in the Deccan appeared in May 1875, in Supa, a village near Poona.
(ii) Under a new law, the British moneylenders were allowed to attach the mortgaged land of the defaulters and auction it off.
(iii) It resulted in transfer of lands from the cultivators to the non-cultivating classes.
(iv) The violence was directed mostly at the Gujarat moneylenders.

[OR]

(c) Early Nationalist Movement in Tamil Nadu
(i) What were the objectives of Madras Native Association?
(ii) What led to the emergence of nationalist press in Tamil Nadu?
(iii) What were the demands of Madras Mahajana Sabha?
(iv) Who were the early nationalist leaders in Tamil Nadu?
Answer:
(c) Early Nationalist Movement in Tamil Nadu
(i) The objective of Madras Native Association was to promote the interests of its members and reduction of taxes. It also protested against the government’s support to missionary activities.

(ii) The entire press opposed the appointment of the first South Indian judge of the Madras High Court in 1878. This led to a need of a nationalist press to express the Indian perspective. The Hindu was started in 1878 and soon became a vehicle for nationalist propaganda.

(iii) The demands of Madras Mahajana Sabha were to conduct civil services examinations simultaneously in England and India, abolition of India Council in London, reduction of taxes, and reduction of civil and military expenditure.

(iv) Some early nationalists in Tamil Nadu were: V.S. Srinivasa Sastri, P.S. Sivasamy Iyer, V. Krishnasamy Iyer, T.R. Venkatrama Sastri, G.A. Natesan, T.M. Madhava Rao and S. Subramania Iyer.

(d) Labour Movement in Tamil Nadu
(i) Highlight the factors that caused the birth of Trade Union Movement in Madras.
(ii) Identify the three prominent persons associated with the Madras Labour Union.
(iii) Where was the first conference of All India Trade Union Congress held?
(iv) Who organized the first ever celebration of May Day in Madras and which year?
Answer:
(d) Labour Movement in Tamil Nadu
(i) The factors that caused the birth of Trade Union Movement in Madras are,

• Retrenchment of workers at the end of the First World War.
• Nationalists’ support to the cause of labour.

(ii) Three prominent persons associated with the Madras Labour Union are B.R Walia, M. Singaravelar and Thiru.Vi. Kalyanasundaram.

(iii) The first All India Trade Union Conference was held in Bombay.
(iv) M. Singaravelar organised the first ever celebration of May Day in Madras in 1923.

Question 44.
Mark the following places on the given outline map of India.
(i) Western Ghats
(ii) Mahanadi
(iii) Malwa Plateau
(iv) Panna biosphere reserve
(v) Southwest Monsoon
(vi) Black soil region
(vii) Tea growing area
(viii) Hirakud Dam
Answer:

[OR]

Mark the following places on the given outline map of Tamil Nadu:
(i) One Lignite producing area
(ii) Neyveli
(iii) Kollidam
(iv) Decidious forest area
(v) Alluvial soil region
(vi) Cuddalore
(vii) Vellore
(viii) River Chittar
Answer:

Map for Q. 42
(i) Bosnia
(ii) Romania
(iii) Serbia
(iv) Bulgaria
(v) Turkey
Answer:

Map for Q. 44
(i) Western Ghats
(ii) Mahanadi
(iii) Malwa Plateau
(iv) Panna biosphere reserve
(v) Southwest Monsoon
(vi) Black soil region
(vii) Tea growing area
(viii) Hirakud Dam
Answer:

Map for Q.44
(j) One Lignite producing area
(ii) Neyveli
(iii) Kollidam
(iv) Decidious forest area
(v) Alluvial soil regions
(vi) Cuddalore
(vii) Vellore
(viii) River Chittar
Answer:

Students can Download Tamil Nadu 12th Chemistry Model Question Paper 2 English Medium Pdf, Tamil Nadu 12th Chemistry Model Question Papers helps you to revise the complete Tamilnadu State Board New Syllabus, helps students complete homework assignments and to score high marks in board exams.

TN State Board 12th Chemistry Model Question Paper 2 English Medium

Time: 3 Hours
Maximum Marks: 70

Instructions:

1. The question paper comprises of four parts
2. You are to attempt all the parts An internal choice of questions is provided wherever applicable
3. All questions of Part I, II, III, and IV are to be attempted separately
4. Question numbers 1 to 15 in Part I are Multiple Choice Questions of one mark each. These are to be answered by choosing the most suitable answer from the given four alternatives and writing the option code and the corresponding answer
5. Question numbers 16 to 24 in Part II are two-mark questions. These are lo be answered in about one or two sentences
6. Question numbers 25 to 33 in Part III are three-marks questions. These are to be answered in about three to five short sentences
7. Question numbers 34 to 38 in Part IV are five-mark Questions These are to answered in detail. Draw diagrams wherever necessary

Part – 1

Answer all the questions. Choose the correct answer. [15 × 1 = 15]

Question 1.
Blistered copper is .
(a) 98% pure copper
(b) 96% pure copper
(c) 97% pure copper
(d) 88% pure copper
Answer:
(a) 98% pure copper

Question 2.
Which of the following statements is not correct?
(a) Beryl is a cyclic silicate
(b) Mg₂SiO₄ is an orthosilicate
(c) SiO₄ is the basic structural unit of silicates
(d) Feldspar is not aluminosilicate
Answer:
(d) Feldspar is not aluminosilicate

Question 3.
Consider the following statements.
(i) phosphine is the most important hydride of phosphorous
(ii) phosphine is a poisonous gas with rotten egg smell.
(iii) phosphine is a powerful reducing agent
Which of the above statement(s) is / are correct?
(a) (i) and (ii)
(b) (ii) and (iii)
(c) (i) and (iii)
(d) (ii) only
Answer:
(c) (i) and (iii)

Question 4.
The correct order of increasing oxidizing power in the series


Answer:

Hint: VO₂⁺ < Cr₂O₇^2- < MnO₄^– greater the oxidation state, higher is the oxidising power.

Question 5.
The geometry possible in [Fe F₆]^4- and [COF₊₆]^4- is ……………
(a) Trigonal bipyramidal
(b) Square planar
(c) Octahedral
(d) Tetrahedral
Answer:
(c) Octahedral

Question 6.
The number of carbon atoms per unit cell of diamond is
(a) 8
(b) 6
(c) 1
(d) 4
Answer:
(a) 8

Hint: In diamond carbon forming fee. Carbon occupies comers and face centres and also occupying half of the tetrahedral voids.

Question 7.
In a homogeneous reaction
A → B + C + D, the initial pressure was P₀ and after time t it was P. Expression for rate constant in terms of P₀ , P and t will be ……..

Answer:

Solution:

Question 8.
The solubility of an aqueous solution of Mg(OH)₂ be x then its K_sp is
(a) 4x³
(b) 108x⁵
(c) 27x⁴
(d) 9x
Answer:
(a) 4x³
Solution:
Mg(OH)₂ Mg²⁺(x) + 2OH^– ((2x)²)
K_sp = 4x³

Question 9.
During electrolysis of molten sodium chloride, the time required to produce 0. lmol of chlorine gas using a current of 3 A is ……………..
(a) 55 minutes
(b) 107.2 minutes
(c) 220 minutes
(d) 330 minutes
Hint: m = ZIt (mass of 1 mole of Cl₂ gas = 71)
Answer:
(b) 107.2 minutes

Question 10:
The coagulation values in millimoles per litre of the electrolytes used for the coagulation of AS₂S₃ are given below
(I) (NaCl) = 52
(II) (BaCl) = 0.69
(III) (MgSO₄) = 0.22
The correct order of their coagulating power is
(a) III > II > I
(b) I > II > III
(c) I > III > II
(d) II > III> I
coagulating power ± \(\frac{1}{\text { coagulation value }}\)
Answer:
(a) III > II > I

Question 10.
Assertion : Coagulation power of Al³⁺ is more than Na⁺ .
Reason : greater the valency of the flocculating ion added, greater is its power to cause precipitation
(a) if both assertion and reason are true and reason is the correct explanation of assertion. (Hardy-Sechulze rule)
(b) if both assertion and reason are true but reason is not the correct explanation of assertion.
(c) assertion is true but reason is false
(d) both assertion and reason are false.
Answer:
(a) if both assertion and reason are true and reason is the correct explanation of assertion. (Hardy-Sechulze rule)

Question 11.


Answer:
(a) A- 2, B – 3, C – 4, D – 1

Question 12.
Which of the following represents the correct order of acidity in the given compounds (
(a) FCH₂COOH > CH₃COOH > BrCH₂COOH > ClCH₃COOH
(b) FCH₂COOH > ClCH2COOH > BrCH COOH > CH COOH
(c) CH₃COOH > ClCH₂COOH > FCH₂COOH > Br – CH₂COOH
(d) Cl CH₂COOH > CH₃COOH > BrCH₂COOH > ICH₂COOH
Hint. -I effect increases the acidity. If electronegativity is high, -I effect is also high.
Answer:
(b) FCH₂COOH > ClCH2COOH > BrCH COOH > CH COOH

Question 13.
1 -nitrobutane and 2-methyl-1 -nitropropane are belong to
(a) position isomerism
(b) functional isomerism
(c) Tautomerism
(d) chain isomerism
Answer:
(d) chain isomerism

Question 14.
Haemoglobin is
(a) an enzyme
(b) a globular protein
(c) a vitamin
(d) carbohydrate
Answer:
(b) a globular protein

Question 15.
An example of antifertility drug is
(a) novestrol
(b) seldane
(c) salvarsan
(d) Chloramphenicol
Answer:
(a) novestrol

Part – II

Answer any six questions. Question No. 20 is compulsory. [6 x 2 = 12]

Question 16.
Name the method used for the refining of (i) Nickel (ii) Zirconium
Answer:
(i) Mond’s process
(ii) Van Arkel’s method

Question 17.
Complete the following reactions:
(a) B(OH)₃ + NH₃ →
(b) Na₂B₄O₇ + H₂SO₄ + H₂O
Answer:

Question 18.
KMnO₄ does not act as oxidising agent in the presence of HC1. Why?
Answer:
HCl cannot be used for making acidified KMnO₄ as oxidising agent, since it reacts with KMnO₄ as follows.
2MnO₄^– + 10 Cl^– + 16H⁺ → 2Mn²⁺ + 5Cl₂ + 8H₂O

Question 19.
A reaction is first order in A and second order in B.
(i) Write the differential rate equation.
(ii) How is the rate affected on increasing the concentration of B three times?
(iii) How is the rate affected when the concentrations of both A and B are doubled? ,
Answer:
(i) \(\frac{d x}{d t}=k[\mathrm{A}]^{1}[\mathrm{B}]^{2}\)
(ii) If concentration of ‘B ’ is tripled, then the rate will become 9 times.
(iii) When concentration of both A and B are doubled, then the rate will become 8 times.

Question 20.
Calculate the pH of 0.04 M HNO₃ Solution.
Answer:
Concentration of HNO₃ = 0.04M
[H₃O⁺] = 0.04 mol dm^-3
pH = -log[H₃O⁺]
= – log(0.04)
= – log(4 x 10^-2)
= 2 -log 4 = 2-0.6021
= 1.3979= 1.40

Question 21.
Write a note about Helmoholtz double layer.
Answer:
The surface of a colloidal particle adsorbs one type of ion due to preferential adsorption. This layer attracts the oppositely charged ions in the medium and hence the boundary separating the two electrical double layers are set up. This is called Helmholtz electrical double layer. As the particles nearby are having similar charges, they cannot come close and condense. Hence this helps to explain the stability of the colloid.

Question 22.
Why HCOOH does not give Hell-Volhard Zelinsky reaction but CH₃3COOH does?
Answer:
CH₃COOH contains α – hydrogen atom and hence gives HVZ reaction but HCOOH does not contain an α – hydrogen atom and hence does not give HVZ reaction.

Question 23.
What happens when
Oxidation of acetoneoxime with trifluoroperoxy acetic acid.
Answer:
Oxidation of acetoneoxime with trifluoroperoxy acetic acid gives 2-nitropropane.

Question 24.
What are food preservatives?
Answer:
Food preservatives are chemical substances are capable of inhibiting, retarding or arresting the process of fermentation, acidification or other decomposition of food by growth of micro organisms.
Examples:

• Acetic acid is used mainly as a preservative for preparation of pickles.
• Sodium meta sulphite is used as preservative for fresh vegetables and fruits.
• Sodium benzoate is used as preservative for juices.

Part – III

Answer any six questions. Question No. 31 is compulsory. [6 x 3 = 18]

Question 25.
Explain the principle of electrolytic refining with an example.
Answer:
The crude metal is refined by electrolysis. It is carried out in an electrolytic cell containing aqueous solution of the salts of the metal of interest. The rods of impure metal are used as anode and thin strips of pure metal are used as cathode. The metal of interest dissolves from the anode, pass into the solution while the same amount of metal ions from the solution will be deposited at the cathode. During electrolysis, the less electropositive impurities in the anode, settle down at the bottom and are removed as anode mud.
Let us understand this process by considering electrolytic refining of silver as an example.
Cathode: Pure silver
Anode: Impure silver rods

Electrolyte: Acidified aqueous solution of silver nitrate.
When a current is passed through the electrodes the following reactions will take place
Reaction at anode: 2Ag(s) → Ag⁺ (aq) + le^–
Reaction at cathode: Ag⁺(aq)+ le^– → Ag (s)

During electrolysis, at the anode the silver atoms lose electrons and enter the solution. The positively charged silver cations migrate towards the cathode and get discharged by gaining electrons and deposited on the cathode. Other metals such as copper, zinc etc.,can also be refined by this process in a similar manner.

Question 26.
How will you prepare phosphine and explain the purification of phosphine?
Phosphine’is prepared by action of sodium hydroxide with white phosphorous in an inert atmosphere of carbon dioxide or hydrogen.

Phosphine is freed from phosphine dihydride (P2H4) by passing through a freezing mixture. The dihydride condenses while phosphine does not.
Phosphine can also prepared by the hydrolysis of metallic phosphides with water or dilute mineral acids.

Phosphine is prepared in pure form by heating phosphorous acid.

A pure sample of phosphine is prepared by heating phosphonium iodide with caustic soda S0lution.

Question 27.
Justify the position of lanthanides and actinides in the periodic table.
Answer:
(i) In sixth period after lanthanum, the electrons are preferentially filled in inner 4f sub shell and these 14 elements following lanthanum show similar chemical properties. Therefore these elements are grouped together and placed at the bottom of the periodic table. This position can be justified as follows.
(a) Lanthanoids have general electronic configuration [Xe] 4f2 14 5d° 1 6s2
(b) The common oxidation state of lanthanoids is +3
(c) All these elements have similar physical and chemical properties.

(ii) Similarly the fourteen elements following actinium resemble in their physical and chemical properties.

(iii) If we place these elements after Lanthanum in the periodic table below 4d series and actinides below 5d series, the properties of the elements belongs to a group would be different and it would affect the proper structure of the periodic table.

(iv) Hence a separate position is provided to the inner transition elements at the bottom of the periodic table.

Question 28.
Distinguish between isotropy and anisotropy?
Answer:
Isotropy:

1. Isotropy means uniformity in all directions.
2. Isotropy means having identical values of physical properties such as refractive index, electrical conductance in all directions.
3. Isotropy is the property of amorphous solids.

Anisotropy :

1. Anisotropy means non-uniformity in all directions.
2. Anisotropy is the property which depends on the direction of measurement. They show different values of physical properties when measured along different directions.
3. Anisotropy is the properly of crystalline solids.

Question 29.
What are the merits and limitations of the intermediate compound theory?
Answer:
Merits:
(i) The specificity of a catalyst
(ii) The increase in the rate of the reaction with increase in the concentration of catalyst.

Limitations:
(i) This theory fails to explain the action of catalytic poison and promoters. .
(ii) This theory is unable to explain the mechanism of heterogeneous catalysed reactions.

Question 30.
Write a note on sacrificial protection.
Answer:
In this method, the metallic structure to be protected is made cathode by connecting it with more active metal (anodic metal). So that all the corrosion will concentrate only on the active metal. The artificially made anode thus gradually gets corroded protecting the original metallic structure. Hence this process is otherwise known as sacrificial anodic protection.
Al, Zn and Mg are used as sacrificial anodes.

Question 31.
1mole of Hlis allowed to react with t-butyl methylether. Identify the product and write down the mechanism of the reaction.
Answer:

Question 32.
How will you prove the presence of aldehyde group in glucose?
Answer:
(i) Glucose is oxidised to gluconic acid with ammoniacal silver nitrate (Tollen’s reagent) and alkaline copper sulphate (Fehling’s solution). Tollen’s reagent is reduced to metallic silver and Fehling’s solution to cuprous oxide (red precipitate). These reactions confirm the presence of an aldehye group in glucose.

Question 33.
Explain about anaesthetics with their types.
(i) Local anaesthetics: It causes loss of sensation in the area in which it is applied without losing consciousness. They block pain perception that is transmitted via peripheral nerve fibres to the brain.
Example: Procaine, Li do caine.
They are often used during minor surgical procedures.

(ii) General anaesthetics: They cause a controlled and reversible loss of consciousness by affecting central nervous system.
Example: Propofol, Isoflurane.
They are often used for major surgical procedures.

Part – IV

Answer all the questions. [5 x 5 = 25]

Question 34.
(a) (i) CO is more stable at higher temperature. Why? (2)
(ii) How will you prepare potash alum? (3)
[OR]
(b) (i) Give the balanced equation for the reaction between chlorine with cold NaOH. (3)
(ii) Nitrogen exists as diatomic molecule and Phosphrus as P₄ Why? (2)
Answer:
(a) (i) In the Ellingham diagram, the formation of carbon monoxide is a straight line with negative slope. In this case AS is positive as 2 moles of CO gas is formed by the consumption of one mole of oxygen. Hence, CO is more stable at higher temperature.

(ii) The alunite the alum stone is the naturally occurring form and it is K₂SO₄ . Al₂(S0₄)₃.4Al(0H)₃. When alum stone is treated with excess of sulphuric acid, the aluminium hydroxide is converted to aluminium sulphate. A calculated quality of – potassium sulphate is added and the solution is crystallised to generate potash alum. It is purified by recrystallisation.
(2)

(b)(i) Reaction between chlorine with cold NaoH

Chlorine reacts with cold NaOH to give sodium chloride and sodium hypochlorite.

(ii) Nitrogen has a triple bond between its two atoms because of its small size and high electronegativity. Phosphorus P₄ has single bond, that is why it is tetra-atomic.

Question 35.
(a) (i) Discuss the ortho and pyro silicates. (2)
(ii) Compare lanthanides and actinides. (3)
[OR]
(b) (i) Ni²⁺ is identified using alcoholic solution of dimethyl glyoxime. Write the structural formula for the rosy red precipitate of a complex formed in the reaction. (3)
Cu⁺, Zn²⁺, Sc³⁺, Ti⁴⁺ are colourless. Prove this statement. (2)
Answer:
Ortho silicates: The simplest silicates which contain discrete [SiO₄]^4- tetrahedral units are called ortho silicates or neso silicates.

Examples: Phenacite – Be₂SiO₄(Be²⁺ ions are tetrahedrally surrounded by O^2- ions), Olivine – (Fe/Mg)₂ SiO₄ (‘Fe²⁺ and Mg²⁺ cations are octahedrally surrounded by O

Pyro silicates: Silicates which contain [Si₂O₇]^6- ions are called pyro silicates (or) Soro silicates. They are formed by joining two [SiO₄]^4-

tetrahedral units by sharing one oxygen atom at one comer, (one oxygen is removed while joining). Example: Thortveitite – Sc₂Si₂O₇

(ii)
Lanthanoids

1. Differentiating electron enters in 4f orbital
2. Binding energy of 4f orbitals are higher
3. They show less tendency to form complexes
4. Most of the lanthanoids are colourless
5. They do not form oxo cations
6. Besides +3 oxidation states lanthanoids show +2 and +4 oxidation states in few cases.

Actinoids

1. Differentiating electron enters in 5f orbital
2. Binding energy of 5f orbitals are lower
3. They show greater tendency to form complexes
4. Most of the actinoids are coloured.
5. E.g : U³⁺ (red), U⁴⁺ (green), UO₂²⁺ (yellow)
6. They do form oxo cations such as UO₂²⁺ NpO₂²⁺ etc.
7. Besides +3 oxidation states actinoids show higher oxidation states such as +4, +5, +6 and +7.

[OR]

(b) (i) Ni²⁺ ions present in Nickel chloride solution is estimated accurately for forming an insoluble complex called [Ni(DMG)₂]
Nickel ion reacts with alcoholic solution of DMG in the presence of ammonical medium, to give rosy red precipitate of [Ni(DMG)₂] complex.

(ii) 1. Cu⁺, Zn²⁺ have d10 configuration and Sc³⁺, Ti⁴⁺have d¹ configuration.
2. d-d transition is not possible in the above complexes. So they are colourless.

Question 36.
(a) i)0 What is meant by the term “coordination number”? What is the coordination number of atoms in a bcc structure? (2)
(ii) Rate constant k of a reaction varies with temperature T according to the following Arrhenius equation
\(\log \mathbf{k}=\log \mathbf{A} \frac{\mathbf{E}_{\mathbf{a}}}{2.303 \mathbf{R}}\left(\frac{1}{\mathbf{T}}\right)\)

Where E_a is the activation energy. When a graph is plotted for logk Vs \(\frac{1}{T}\) a straight line
with a slope of- 4000K Is obtained. Calculate the activation energy. (3)

(OR)

(b) (i) Explain about the hydrolysis of salt of strong base and weak acid. Derive the value of K_h for that reaction. (3)
(ii) Identify the Lewis acid and the Lewis base in the following reactions. (2)

Answer:
(a) (i) 1. Let us consider the reaction between sodium hydroxide and acetic acid to give sodium acetate and water

NaOH_(aq) + CH₃COOH_(aq) ⇌ CH₃COONa_(aq) + H₂O

2. Coordination number of atoms in a bcc structure is 8

(ii) logk = logA – \(\frac{\mathrm{E}_{\mathrm{a}}}{2.303 \mathrm{R}}\left(\frac{1}{\mathrm{T}}\right)\)
y = c + mx
m = \(-\frac{E_{a}}{2.303 R}\)
E_a =—2.303Rm
E_a = – 2.303 x 8.314 J K^-1 mol^-1 x (— 4000 K)
E_a = 76,589 J mol^-1
E_a =76589kJmol^-1

[OR]

(b) (i) 1. Coordination number: The number of nearest neighbours that surrounding a particle in a crystal is called the coordination number of that particle.
2. In aqueous solution, CH₃COONa is completely dissociated as follows.
CH₃COONa_(aq), →  CH₃COO^–_(aq) + Na⁺_(aq)

3. CH₃COO^– is a conjugate base of the weak acid CHCOOH and it has a tendency to react with H⁺ from water to produce unionised acid. But there is no such tendency
for Na⁺ to react with OH^–

4.

such cases, the solution is basic due to the hydrolysis and pH is greater than 7.

5. Relationship between equilibrium constant, hydrolysis constant and the dissociation constant of acid is derived as follows:

K_h value in terms of degree of hydrolysis (h) and the concentration of salt (c) for the equilibrium can be obtained as in the case of Ostwald’s dilution law K_h = h²C and \(\left[\mathrm{OH}^{-}\right]=\sqrt{\mathrm{K}_{\mathrm{h}} \cdot \mathrm{c}}\)

Question 37.
(a) (i) What are lyophilic and lyophobic sols? Give one example of each type. Why are
Answer:
(a) (i) Lyophilic Sols: Colloidal sols directly formed by mixing substances like gums, gelatin, starch, rubber, etc. with a suitable liquid (The dispersion medium) are lyophilic sols.
An important characteristic of these sols is that if the dispersion medium is separated from the dispersed phase (say by evaporation) the sol can be reconstituted by simply remixing with the dispersion medium. That is why these sols are also called reversible sols. These sols are quite stable and cannot be easily coagulated.

Lyophobic sols: These colloidal sols can only be prepared by some special methods. These sols are readily precipitated on the addition of small amount of electrolytes, by heating or by shaking and hence are not stable.
Hydrophobic sols are water hating. They are formed by indirect method. These sols are irreversible sols. These sols are readily precipitated by the addition of small amount of electrolytes, by heating or by shaking and hence are not stable.

(ii) 1. The substances when added to a catalysed reaction decreases or completely destroys the activity of a catalyst are often known as catalytic poisons.
2. In the reaction 2SO₂ + O₂ → 2SO₃ with Pt catalyst, the catalyst poison is AS₂O₃

[OR]

(b) (i) 1. Substances like AgCl, PbS04 are sparingly soluble in water. The solubility product can be determined using conductivity experiments.
2. Let us consider AgCl as an example
Agci_(s)) ⇌ Ag⁺ + Cl^–
K_Sp = [Ag ⁺] [Cl^–]

3. Let the concentration of [Ag⁺] be ‘C’ mol L^-1
If [Ag⁺] = C, then [Cl^–] is also equal to C mol L^-1.
.’. K_sp = C.C
K_sp = C²

4. The relationship between molar conductance and equivalent conductance is

(ii) 1. Formic acid contains both an aldehyde as well as an acid group. Hence, like other aldehydes, formic acid can easily be oxidised and therefore acts as a strong reducing agent.

2. Formic acid reduces Tollen’s reagent (ammonical silver nitrate solution) to metallic silver.

3. Formic acid reduces Fehling’s solution. It reduces blue coloured cupric ions to red coloured cuprous ions.

Question 38.
(a) (i) What are the uses of nitrobenzene? (2)
(ii) Write a note on formation of -helix. (3)
[OR]
(b) (i) Define TFM value. (2)
(ii) Differentiate thermoplastic and thermosetting. (3)
Answer:
(a) (i) 1. Nitro benzene is used to produce lubricating oils in motors and machinery.
2. It is used in the manufacture of dyes, drugs, pesticides, synthelic rubber, aniline and explosives like TNT, TNB.
(ii) 1. In the a-helix sub-structure, the aminoacids are arranged in a right handed helical (spiral) structure and are stabilised by the hydrogen bond between the carbonyl oxygen one aminoacid (nth residue) with amino hydrogen of the fifth residue (n+4th residue).

2. The side chains of the residues protrude outside of the helix. Each turn of an a-helix contains about 3.6 residues and is about 5.4 A long.

3. The amino acid pro line produces a line in the helical structure and often called as a helical breaker due to its rigid cyclic structure.

4. Many fibrous proteins such as a-Keratin in hair, nails, wool, skin and myosin in muscles have a-helix structure. Stretching property of human hair is due to the helical structure of a-keratin in hair.

5. Structure of α – helix

[OR]

(b) (i) 1. The quality of a soap is described in terms of total fatty matter (TFM value). It is defined as the total amount of fatty matter that can be separated from a sample after spliting with mineral acids. Higher the TFM value in the soap, better is its quality.
2. As per BIS standards, Grade I soaps should have 76% minimum TFM value (ii) Difference between thermoplastic and thermosetting:

Thermoplastic :

1. They soften on heating and harden on cooling, and they can be remoulded.
2. They consists of linear long chain polymers and low molecular weights polymers.
3. All the polymer chains are held together by weak Vanderwaals forces.
4. They are weak, soft and less brittle.
5. They are formed by addition polymerisation.
6. They are soluble in organic solvents.
7.  Example: PVC, polythene, polystrene etc.

Thermosetting

1. They do not soften on heating and they cannot be remoulded.
2. The consist of three dimensional network structure and high molecular weight polymers.
3. All the polymer chains are linked by strong covalent.
4. They are strong, hard and more brittle.
5. They are formed by condensation polymerisation.
6. They are insoluble in organic solvents.
7. Example: Bakelite, melamine etc.

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• Chapter 1 தமிழ் அமுது
• Chapter 2 கண்ணன் செய்த உதவி
• Chapter 3 தனித்திறமை
• Chapter 4 கல்யாணமாம் கல்யாணம்!
• Chapter 5 மாணவர்கள் நினைத்தால்…
• Chapter 6 துணிந்தவர் வெற்றி கொள்வர்
• Chapter 7 சான்றோர் மொழி
• Chapter 8 நூலகம்
• Chapter 9 மாட்டு வண்டியிலே…

Samacheer Kalvi 3rd Standard Tamil Book Solutions Term 2

• Chapter 1 உண்மையே உயர்வு
• Chapter 2 ஒன்றுபட்டால் உண்டு வாழ்வு
• Chapter 3 கல்வி கண் போன்றது
• Chapter 4 திருக்குறள் கதைகள்
• Chapter 5 வாலு போயி கத்தி வந்தது! டும்…டும்..டும்…டும்
• Chapter 6 எழில் கொஞ்சும் அருவி
• Chapter 7 நாயும், ஓநாயும்
• Chapter 8 நட்பே உயர்வு

Samacheer Kalvi 3rd Standard Tamil Book Answers Term 3

• Chapter 1 உள்ளங்கையில் ஓர் உலகம்
• Chapter 2 தூக்கணாங்குருவியும் ஒட்டகச்சிவிங்கியும்
• Chapter 3 வீம்பால் வந்த விளைவு
• Chapter 4 மழைநீர்
• Chapter 5 காகமும் நாகமும்
• Chapter 6 நல்வழி
• Chapter 7 தமிழ்மொழியின் பெருமை
• Chapter 8 அறிவூட்டும் தொலைக்காட்சிச் செய்திகள்

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• Chapter 1 Our Kitchen
• Chapter 2 The Insects
• Chapter 3 The World Around Us

Samacheer Kalvi 3rd Standard English Book Solutions Term 2

• Chapter 1 Seasons’ Story
• Chapter 2 Trip to the Store

Samacheer Kalvi 3rd Standard English Book Answers Term 3

• Chapter 1 Our Leafy Friends
• Chapter 2 Tools We Use
• Chapter 3 Places in My Town

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• Chapter 1 Family
• Chapter 2 Our Friends
• Chapter 3 Panchayat
• Chapter 4 Safety

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• Chapter 1 Historical Places
• Chapter 2 Sanctuaries
• Chapter 3 District Administration

Samacheer Kalvi 3rd Standard Social Science Book Answers Term 3

• Chapter 1 Freedom Fighters of Tamil Nadu
• Chapter 2 Mineral Resources
• Chapter 3 Child Safety

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Samacheer Kalvi 3rd Social Science Book Solutions Term 1

• Chapter 1 குடும்பம்
• Chapter 2 நமது நண்பர்கள்
• Chapter 3 ஊராட்சி மன்றம்
• Chapter 4 பாதுகாப்பு

Samacheer Kalvi 3rd Social Science Book Solutions Term 2

• Chapter 1 வரலாற்றுச் சிறப்புமிக்க இடங்கள்
• Chapter 2 சரணாலயங்கள்
• Chapter 3 மாவட்ட நிருவாகம்

Samacheer Kalvi 3rd Social Science Book Solutions Term 3

• Chapter 1 தமிழ்நாட்டின் சுதந்திரப் போராட்ட வீரர்கள்
• Chapter 2 கனிம வளங்கள்
• Chapter 3 குழந்தைகளின் பாதுகாப்பு

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• Chapter 1 My Body
• Chapter 2 States of Matter
• Chapter 3 Force
• Chapter 4 Science in Everyday Life

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• Chapter 1 Food
• Chapter 2 Water
• Chapter 3 Plants

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• Chapter 1 Our Environment
• Chapter 2 Animal Life
• Chapter 3 Air

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Samacheer Kalvi 3rd Science Book Solutions Term 1

• Chapter 1 எனது உடல்
• Chapter 2 பருப்பொருள்களின் நிலைகள்
• Chapter 3 விசை
• Chapter 4 அன்றாட வாழ்வில் அறிவியல்

Samacheer Kalvi 3rd Science Book Solutions Term 2

• Chapter 1 உணவு
• Chapter 2 நீர்
• Chapter 3 தாவரங்கள்

Samacheer Kalvi 3rd Science Book Solutions Term 3

• Chapter 1 நமது சுற்றுச்சூழல்
• Chapter 2 விலங்குகளின் வாழ்க்கை
• Chapter 3 காற்று

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3rd Standard Maths Guide Samacheer Kalvi Term 1

• Chapter 1 Geometry
• Chapter 2 Numbers
• Chapter 3 Patterns
• Chapter 4 Measurements
• Chapter 5 Time
• Chapter 6 Information Processing

Samacheer Kalvi 3rd Standard Maths Book Solutions Term 2

• Chapter 1 Numbers
• Chapter 2 Patterns
• Chapter 3 Measurements
• Chapter 4 Time
• Chapter 5 Information Processing

Samacheer Kalvi 3rd Standard Maths Book Answers Term 3

• Chapter 1 Geometry
• Chapter 2 Numbers
• Chapter 3 Patterns
• Chapter 4 Measurements
• Chapter 5 Money
• Chapter 6 Time
• Chapter 7 Information Processing

Samacheer Kalvi 3rd Std Maths Book Solutions in Tamil Medium

Samacheer Kalvi 3rd Maths Book Solutions Term 1

• Chapter 1 வடிவியல்
• Chapter 2 எண்கள்
• Chapter 3 அமைப்புகள்
• Chapter 4 அளவீடுகள்
• Chapter 5 நேரம்
• Chapter 6 தகவல் செயலாக்கம்

Samacheer Kalvi 3rd Maths Book Solutions Term 2

• Chapter 1 எண்கள்
• Chapter 2 அமைப்புகள்
• Chapter 3 அளவைகள்
• Chapter 4 காலம்
• Chapter 5 தகவல் செயலாக்கம்

Samacheer Kalvi 3rd Maths Book Solutions Term 3

• Chapter 1 வடிவியல்
• Chapter 2 எண்கள்
• Chapter 3 அமைப்புகள்
• Chapter 4 அளவைகள்
• Chapter 5 பணம்
• Chapter 6 நேரம்
• Chapter 7 தகவல் செயலாக்கம்

We hope these Tamilnadu State Board Samacheer Kalvi Class 3rd Maths Book Solutions Answers Pdf Free Download in English Medium and Tamil Medium will help you get through your subjective questions in the exam.

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Subject Matter Experts at TNBoardSolutions.Com have created Tamil Nadu State Board Samacheer Kalvi 3rd Standard Books Answers Solutions Guide Pdf Free Download of Term 1, 2, 3 in English Medium and Tamil Medium are part of Samacheer Kalvi Books Solutions.

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Samacheer Kalvi 3rd Standard Text Book Solutions Back Answers Guide Pdf Free Download

• Samacheer Kalvi 3rd Standard Maths Guide
• Samacheer Kalvi 3rd Standard Science Guide
• Samacheer Kalvi 3rd Standard Social Science Guide
• Samacheer Kalvi 3rd Standard English Guide
• Samacheer Kalvi 3rd Standard Tamil Guide

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Subject Matter Experts at SamacheerKalvi.Guide have created Tamil Nadu State Board Samacheer Kalvi 4th Science Book Answers Solutions Guide Pdf Free Download of Term 1, 2, 3 in English Medium and Tamil Medium are part of Samacheer Kalvi 4th Books Solutions.

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Tamilnadu State Board Samacheer Kalvi 4th Science Book Back Answers Solutions Guide Term 1, 2, 3.

Samacheer Kalvi 4th Science Book Back Answers

Samacheer Kalvi 4th Science Book Solutions Term 1

• Chapter 1 My Body
• Chapter 2 Matter and Materials
• Chapter 3 Work and Energy
• Chapter 4 Science in Everyday Life

Samacheer Kalvi 4th Science Book Solutions Term 2

• Chapter 1 Food
• Chapter 2 Water
• Chapter 3 Plants

Samacheer Kalvi 4th Science Book Solutions Term 3

• Chapter 1 Green Environment
• Chapter 2 Life of Animals
• Chapter 3 Air We Breathe

Samacheer Kalvi 4th Science Book Solutions in Tamil Medium

Samacheer Kalvi 4th Science Book Solutions Term 1

• Chapter 1 எனது உடல்
• Chapter 2 பருப்பொருள் மற்றும் பொருள்கள்
• Chapter 3 வேலை மற்றும் ஆற்றல்
• Chapter 4 அன்றாட வாழ்வில் அறிவியல்

Samacheer Kalvi 4th Science Book Solutions Term 2

• Chapter 1 உணவு
• Chapter 2 நீர்
• Chapter 3 தாவரங்கள்

Samacheer Kalvi 4th Science Book Solutions Term 3

• Chapter 1 பசுமை சுற்றுச்சூழல்
• Chapter 2 விலங்குகளின் வாழ்க்கை
• Chapter 3 நாம் சுவாசிக்கும் காற்று

We hope these Tamilnadu State Board Samacheer Kalvi Class 4th Science Book Solutions Answers Pdf Free Download in English Medium and Tamil Medium will help you get through your subjective questions in the exam.

Let us know if you have any concerns regarding TN State Board New Syllabus Samacheer Kalvi 4th Standard Science Guide Pdf of Text Book Back Questions and Answers Term 1, 2, 3, Chapter Wise Important Questions, Study Material, Question Bank, Notes drop a comment below and we will get back to you as soon as possible.