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General Knowledge :: Physics

  1. A fresh egg when placed in salt water will

  2. A.

     Sink and go to the bottom

    B.

     Sink but will not go to the bottom

    C.

     Float

    D.

     Burst


  3. Burns caused by steam are much severe than those caused by boiling water because

  4. A.

     Steam pierces through the pores of body quickly

    B.

     Steam has latent heat

    C.

     Steam is gas and engulfs the body quickly

    D.

     Temperature of steam is higher


  5. Which of the following has got more heat capacity ?

  6. A.

     Iron piece

    B.

     Water

    C.

     Gold piece

    D.

     Benzene


  7. Which of the following produces more severe burns ?

  8. A.

     Boiling water

    B.

     Hot water

    C.

     Steam

    D.

     Melting iceberg


  9. Heat stored in water vapour is

  10. A.

     Specific heat

    B.

     Latent heat

    C.

     Absolute heat

    D.

     Relative heat


  11. Which one of the following has the highest value of specific heat?

  12. A.

     Glass

    B.

     Copper

    C.

     Lead

    D.

     Water


  13. Water is not suitable as a calorimetric substance because it :

  14. A.

     Has high specific heat

    B.

     Is a good conductor

    C.

     Has high boiling point

    D.

     Low latent heat of vapourization


  15. Water is used in car radiator because of its

  16. A.

     Low density

    B.

     Easy availability

    C.

     High specific heat capacity

    D.

     Low boiling point


  17. How much mechanical work must be done to completely melt 1 gram of ice at 0°C ?

  18. A.

     4.2 J

    B.

     80 J

    C.

     336 J

    D.

     2268 J


  19. Water pipes in hilly areas often burst on a cold frosty night, because

  20. A.

     The material of which pipes are made contracts due to cold and so breaks

    B.

     Water in the pipes freezes and on freezing water expands, so pipes break

    C.

     Frost makes the pipes rusty, so they break

    D.

     None of these