156. A real gas can be liquefied by the application of pressure when its temperature is

1. 1. Above the room temperature

   
   
   

   2. Above the inversion temperature

   
   
   

   3. At the Boyle temperature

   
   
   

   4. At the critical temperature

   
   
   

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   N/A

   Correct Option: D

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157. A polished metal plate with rough black spot on it is heated to about 2000 K and quickly taken to a dark room. Then the spot

1. 1. Will appear brighter than the plate

   
   
   

   2. Will appear darker than the plate

   
   
   

   3. And the plate will appear equally bright

   
   
   

   4. None of the above

   
   
   

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   N/A

   Correct Option: A

   N/A

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158. Low temperatures (cryogenise) find application in

1. 1. Space travel, surgery and magnetic levitation

   
   
   

   2. Surgery, magnetic levitation and telemetry

   
   
   

   3. Space travel, surgery and telemetry

   
   
   

   4. Space travel, magnetic levitation and telemetry

   
   
   

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   N/A

   Correct Option: A

   N/A

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159. Metal tea pots have wooden handless because

1. 1. Wood is bad conductor of heat

   
   
   

   2. It prevents electric shock

   
   
   

   3. It gives beauty to the pots

   
   
   

   4. It is hygienic

   
   
   

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   N/A

   Correct Option: A

   N/A

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160. The specific heat of a gas at constant pressure is greater than the specific heat at constant volume because

1. 1. Work is done in the expansion of the gas at constant pressure

   
   
   

   2. Work is done in the expansion of the gas at constant volume

   
   
   

   3. The attraction between the molecules increases at constant pressure

   
   
   

   4. The molecular collision increases at constant pressure

   
   
   

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1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: A

   N/A

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