Natural vegetation, forests and wildlife

PYQ (2012-2024 papers)

• 2024 · G4 · Question 154 · Disputed answer key: no answer is shown
• 2024 · G4 · Question 156 · Final answer key
• 2022 · G4 · Question 105 · Disputed answer key: no answer is shown
• 2022 · G4 · Question 144 · Final answer key
• 2022 · G4 · Question 197 · Disputed answer key: no answer is shown
• 2018 · G4 · Question 186 · Final answer key
• 2016 · VAO · Question 95 · Final answer key
• 2016 · VAO · Question 127 · Final answer key
• 2012 · G4 · Question 36 · Provisional answer key

Provisional key: until TNPSC publishes the final key; the answer may change.

Free questions

1. Question 1

   Consider the following statements on the forests of India and annual rainfall. 1. Tropical evergreen forests grow where the rain is over 200 cm and the humidity over 70 per cent. 2. Tropical deciduous forests are found where the rain is 100 to 200 cm. 3. Tropical dry forests are found where the rain is 50 to 100 cm. 4. Thorn forests are found only where the rain is under 25 cm. Which of these are correct?

   1. A. 1 and 2 only
   2. B. 1, 2 and 3 only
   3. C. 2, 3 and 4 only
   4. D. 1, 2, 3 and 4
   Answer and explanation

   ✓ Correct answer: B. 1, 2 and 3 only

   Evergreen forests need over 200 cm, deciduous 100-200 cm and dry forests 50-100 cm of rain; thorn forests are where the rain is under 50 cm, and 25 cm is the mark of the desert biome, so 4 is wrong.

   Source: சமூக அறிவியல், பத்தாம் வகுப்பு, தமிழ் வழி (Social Science, Standard X, Tamil medium; Samacheer Kalvi) (புவியியல் அலகு 2 இந்தியா – காலநிலை மற்றும் இயற்கைத் தாவரங்கள், pp. 157-158 (PDF pp. 163-164))

2. Question 2

   By what other name are tropical deciduous forests called?

   1. A. Monsoon forests
   2. B. Swamp forests
   3. C. Thorn forests
   4. D. Shola forests
   Answer and explanation

   ✓ Correct answer: A. Monsoon forests

   Tropical deciduous forests are also called monsoon forests; teak and sal are their most important trees.

   Source: சமூக அறிவியல், பத்தாம் வகுப்பு, தமிழ் வழி (Social Science, Standard X, Tamil medium; Samacheer Kalvi) (புவியியல் அலகு 2 இந்தியா – காலநிலை மற்றும் இயற்கைத் தாவரங்கள், p. 157 (PDF p. 163))