21. The amount of heat required to raise the temperature of a body through 1 K is called its

1. 1. Thermal capacity

   
   
   

   2. Entropy

   
   
   

   3. Specific heat

   
   
   

   4. Water equivalent

   
   
   

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   N/A

   Correct Option: A

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22. Specific heat of a metal at very low temperatures varies as

1. 1. T

   
   
   

   2. T²

   
   
   

   3. T^3/2

   
   
   

   4. T³

   
   
   

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   N/A

   Correct Option: A

   N/A

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23. A sample of gas expands from volume V₁ to V₂ The amount of work done by the gas is greatest when the expansion is

1. 1. Iso-thermal

   
   
   

   2. Isobaric

   
   
   

   3. Adiabatic

   
   
   

   4. Equal in all cases

   
   
   

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   N/A

   Correct Option: B

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24. With rise of boiling point of a water the latent heat of steam

1. 1. Decreases

   
   
   

   2. Increases

   
   
   

   3. Dose not change

   
   
   

   4. None of these

   
   
   

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   N/A

   Correct Option: A

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25. If a bimetallic strip is heated it will

1. 1. Bend towards the metal with lower thermal expansion co-efficient

   
   
   

   2. Bend towards the metal with higher thermal expansion co-officient

   
   
   

   3. Not bend at all

   
   
   

   4. Twist itself into helix

   
   
   

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1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: A

   N/A

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