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General Science practice questions (Group 4)

Questions 15 to 20 of 20

By TNPSC Guide editorial team · Last updated:

  1. Question 15

    The hydrometer, which helps to find the relative density of a liquid, works on which principle?

    1. A. Pascal's law
    2. B. Kepler's laws
    3. C. Ohm's law
    4. D. Archimedes' principle
    Answer and explanation

    Correct answer: D. Archimedes' principle

    A hydrometer finds the relative density of a liquid and works on Archimedes' principle, which the lactometer also uses.

    Source: அறிவியல், ஒன்பதாம் வகுப்பு, தமிழ் வழி (Science, Standard IX, Tamil medium; Samacheer Kalvi) (அலகு 3 பாய்மங்கள், p. 36 (PDF p. 40))

  2. Question 16

    On the Fahrenheit scale, what is the freezing point?

    1. A. 32°F
    2. B. 0°F
    3. C. 212°F
    4. D. 180°F
    Answer and explanation

    Correct answer: A. 32°F

    On the Fahrenheit scale 32°F is the freezing point and 212°F the steam point, 180 parts apart; on the Celsius scale they are 0°C and 100°C, 100 parts apart.

    Source: அறிவியல், ஒன்பதாம் வகுப்பு, தமிழ் வழி (Science, Standard IX, Tamil medium; Samacheer Kalvi) (அலகு 7 வெப்பம், p. 84 (PDF p. 88))

  3. Question 17

    The ban the Chipko movement won in 1980 forbade felling forests in the Himalayan regions for how many years?

    1. A. 10 years
    2. B. 15 years
    3. C. 20 years
    4. D. 25 years
    Answer and explanation

    Correct answer: B. 15 years

    The Chipko movement won its greatest success in 1980, a ban on felling forests in the Himalayan regions for 15 years.

    Source: அறிவியல், பத்தாம் வகுப்பு, தமிழ் வழி (Science, Standard X, Tamil medium; Samacheer Kalvi) (அலகு 22 சுற்றுச்சூழல் மேலாண்மை, p. 316 (PDF p. 324))

  4. Question 18

    Which of the following is a non-renewable resource?

    1. A. Forests
    2. B. Groundwater
    3. C. Petroleum
    4. D. Solar energy
    Answer and explanation

    Correct answer: C. Petroleum

    Forests, crops, wildlife, groundwater, air and solar energy are renewable; minerals, coal and petroleum are non-renewable.

    Source: அறிவியல், பத்தாம் வகுப்பு, தமிழ் வழி (Science, Standard X, Tamil medium; Samacheer Kalvi) (அலகு 22 சுற்றுச்சூழல் மேலாண்மை, p. 315 (PDF p. 323))

  5. Question 19

    What are also called 'carbon sinks' because they hold carbon?

    1. A. Forests
    2. B. Fossil fuels
    3. C. Farm ponds
    4. D. Tides
    Answer and explanation

    Correct answer: A. Forests

    Forests hold carbon, so they are also called carbon sinks.

    Source: அறிவியல், பத்தாம் வகுப்பு, தமிழ் வழி (Science, Standard X, Tamil medium; Samacheer Kalvi) (அலகு 22 சுற்றுச்சூழல் மேலாண்மை, p. 316 (PDF p. 324))

  6. Question 20

    What does the word 'Chipko' mean?

    1. A. To protect
    2. B. To plant
    3. C. To cut
    4. D. To hug
    Answer and explanation

    Correct answer: D. To hug

    Chipko, the non-violent movement begun in 1973 to protect trees and forests, means 'to hug'.

    Source: அறிவியல், பத்தாம் வகுப்பு, தமிழ் வழி (Science, Standard X, Tamil medium; Samacheer Kalvi) (அலகு 22 சுற்றுச்சூழல் மேலாண்மை, p. 316 (PDF p. 324))

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