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Assertion : Perspiration from human body...

Assertion : Perspiration from human body helps in cooling the body.
Reason : A thin layer of water on the skin enhances its emissivity.

A

Both assertion and reason are true and the reason is the correct explanation of the assertion.

B

Both assertion and reason are true but reason is not the correct explanation of the assertion.

C

Assertion is True , Reason is False

D

Assertion is False but, Reason is True

Text Solution

Verified by Experts

The correct Answer is:
C
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TARGET PUBLICATION-KINETIC THEORY OF GASES AND RADIATION -Competitive thinking
  1. Two bodies A and B are placed in an evacuated vessel maintained at a t...

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  2. The sphere of radii 8 cm and 2 cm are cooling. Their temperatures are ...

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  3. Assertion : Perspiration from human body helps in cooling the body. ...

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  4. Ac cording to Newton's law of cooling, the rate of cooling of a body i...

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  5. A bucket full of hot water cools from 75^(@)C to 70^(@)C in time T(1),...

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  6. A liquid cools from 70 °C to 60 °C in 5 minutes. If the temperature of...

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  7. An object is cooled from 75 ^(@)Cto 65^(@)C in 2 min in a room at 30^...

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  8. A body cools from 100° C to 70° C in 8 second. If temperature of surro...

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  9. A body cools from a temperature 3 T to 2 T in 10 minutes. The room tem...

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  10. Certain quantity of water cools from 70^(@)C to 60^(@)C in the first 5...

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  11. Rate of cooling of body is 0.5^(@)C/min, when the system is 50^(@)C ab...

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  12. Two thermometers A and B are exposed in sunlight. The bulb of A is pai...

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  13. In a given process on an ideal gas, dW=0 and dQlt0. Then for the gas

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  14. A perfect gas goes from state A to another state B by absorbing 8 x 10...

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  15. A metal bar of mass 1.5 kg is heated at atmospheric pressure. Its temp...

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  16. 100g of water is heated from 30^@C to 50^@C. Ignoring the slight expan...

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  17. The work of 146 kJ is performed in order to compress one kilo mole of ...

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  18. A thermally insulated vessel contains an ideal gas of molecular mass M...

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  19. A Carnot refrigerator absorbs heat from water at O °C and gives it to ...

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  20. A Carnot engine, having an efficiency of eta= 1/10 as heat engine, is ...

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