46. A piece of glass is heated to high temperature and then allowed to cool. If it cracks, a possible reason for this is the following property of glass

1. 1. Low thermal conductivity

   
   
   

   2. High thermal conductivity

   
   
   

   3. High specific heat

   
   
   

   4. Low specific heat

   
   
   

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   N/A

   Correct Option: A

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47. At a given volume and temperature, the pressure of a gas

1. 1. Varies inversely as its mass

   
   
   

   2. Varies inversely as the square of its mass

   
   
   

   3. Varies linearly as its mass

   
   
   

   4. Is independent of its mass

   
   
   

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   N/A

   Correct Option: C

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48. Two bodies A and B are of same mass and same amount of heat is given to both of them.
    If the temperature of A increases more than that of B because of heat addition, then.

1. 1. The specific heat capacity of A is more than that of B

   
   
   

   2. The specific heat capacity of A is less than that of B

   
   
   

   3. Both A and B have the same specific heat capacity but A has greater thermal conductivity

   
   
   

   4. Both A and B have the same specific heat capacity but B has greater thermal conductivity

   
   
   

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   N/A

   Correct Option: B

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49. The temperature of a body is an indicator of

1. 1. The total energy of the molecules of the body

   
   
   

   2. The average energy of the molecules of the body

   
   
   

   3. The total velocity of the molecules of the body

   
   
   

   4. The average kinetic energy of the molecules of the body

   
   
   

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   N/A

   Correct Option: D

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50. How can boiling point of a liquid be reduced?

1. 1. By adding a solid of lower melting point

   
   
   

   2. By dissolving a soluble solid in it

   
   
   

   3. By increasing the pressure on the liquid

   
   
   

   4. By decreasing the pressure on the liquid

   
   
   

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   N/A

   Correct Option: D

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