26. A sphere, a cube and thin circular plate, all having the same mass and made of the same material are heated to the same temperature and then allowed to cool, which of them cools fastest?

1. 1. Sphere

   
   
   

   2. Cube

   
   
   

   3. Circular plate

   
   
   

   4. All at the same rate

   
   
   

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   N/A

   Correct Option: C

   N/A

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27. 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

   N/A

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28. The best conductor of heat among the following is

1. 1. Alcohol

   
   
   

   2. Mercury

   
   
   

   3. Ether

   
   
   

   4. Water

   
   
   

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   N/A

   Correct Option: B

   N/A

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29. 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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   N/A

   Correct Option: A

   N/A

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30. If an ideal gas i isothermally expanded, its internal energy will

1. 1. Increase

   
   
   

   2. Decrease

   
   
   

   3. Remain the same

   
   
   

   4. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: C

   N/A

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