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Practice questions

Geography practice questions (Group 4)

Questions 6 to 10 of 20

By TNPSC Guide editorial team · Last updated:

  1. Question 6

    Which layer of the atmosphere is called the "weather-making layer"?

    1. A. The stratosphere
    2. B. The mesosphere
    3. C. The troposphere
    4. D. The exosphere
    Answer and explanation

    Correct answer: C. The troposphere

    All weather events take place in the troposphere, so it is called the "weather-making layer".

    Source: சமூக அறிவியல், ஒன்பதாம் வகுப்பு, தமிழ் வழி (Social Science, Standard IX, Tamil medium; Samacheer Kalvi) (புவியியல் அலகு 3 வளிமண்டலம், p. 194 (PDF p. 200))

  2. Question 7

    Consider the following statements on the water resources of Tamil Nadu. 1. Tamil Nadu has 4 per cent of India's area and 6 per cent of its population. 2. Tamil Nadu has only 2.5 per cent of India's water resources. 3. By the 2017 Tamil Nadu statistical handbook, Tamil Nadu has 81 river basins. 4. By the same handbook, Tamil Nadu has 41,127 lakes. Which of these are correct?

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

    Correct answer: B. 1, 2 and 4 only

    With 4% of India's area and 6% of its population, Tamil Nadu has only 2.5% of its water resources; the 2017 handbook gives 17 river basins, 81 reservoirs and 41,127 lakes; 81 is the number of reservoirs, not of basins, so 3 is wrong.

    Source: சமூக அறிவியல், பத்தாம் வகுப்பு, தமிழ் வழி (Social Science, Standard X, Tamil medium; Samacheer Kalvi) (புவியியல் அலகு 7 தமிழ்நாடு – மானுடப் புவியியல், p. 237 (PDF p. 243))

  3. Question 8

    Which is the largest tributary of the Indus?

    1. A. The Jhelum
    2. B. The Chenab
    3. C. The Sutlej
    4. D. The Yamuna
    Answer and explanation

    Correct answer: B. The Chenab

    The Jhelum, Chenab, Ravi, Beas and Sutlej are tributaries of the Indus; the largest of them is the Chenab.

    Source: சமூக அறிவியல், பத்தாம் வகுப்பு, தமிழ் வழி (Social Science, Standard X, Tamil medium; Samacheer Kalvi) (புவியியல் அலகு 1 இந்தியா – அமைவிடம், நிலத்தோற்றம் மற்றும் வடிகாலமைப்பு, p. 147 (PDF p. 153))

  4. Question 9

    Consider the following statements on the soils of Tamil Nadu. 1. The soils of Tamil Nadu are of five types: alluvial, black, red, laterite and saline. 2. About two-thirds of the state's area is black soil. 3. Black soil is called regur soil or cotton soil. 4. Saline soil is on the Coromandel coast, especially at Vedaranyam. Which of these are correct?

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

    Correct answer: D. 1, 3 and 4 only

    Tamil Nadu has five soil types; about two-thirds of the state is red soil, not black soil; black soil is called regur or cotton soil; saline soil is only on the Coromandel coast, especially at Vedaranyam; so 2 is wrong.

    Source: சமூக அறிவியல், பத்தாம் வகுப்பு, தமிழ் வழி (Social Science, Standard X, Tamil medium; Samacheer Kalvi) (புவியியல் அலகு 6 தமிழ்நாடு – இயற்கைப் பிரிவுகள், p. 222 (PDF p. 228))

  5. Question 10

    Into how many types are rocks divided by their mode of formation?

    1. A. Two
    2. B. Three
    3. C. Five
    4. D. Eight
    Answer and explanation

    Correct answer: B. Three

    By their mode of formation rocks are of three types: igneous, sedimentary and metamorphic.

    Source: சமூக அறிவியல், எட்டாம் வகுப்பு, தமிழ் வழி (Social Science, Standard VIII, Tamil medium; Samacheer Kalvi) (புவியியல் அலகு 1 பாறை மற்றும் மண், p. 100 (PDF p. 106))

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