If mercury in a barometer is replaced by water, the height of 3.75 cm of mercury will be following cm of water___________________?

Related Mcqs:

1. Mercury is often used in barometer because _________________?

   A. it is the best liquid
   B. the height of barometer will be less
   C. its vapour pressure is so low that it may be neglected
   D. both B. and C.
   E. it moves easily

2. A piece of metal of specific gravity 13.6 is placed in mercury of specific gravity 13.6, what fraction of it volume is under mercury ?

   A. the metal piece will simply float over the mercury
   B. the metal piece will be immersed in mercury by half
   C. whole of the metal piece will be immersed with its top surface just at mercury level
   D. metal piece will sink to the bottom
   E. none of the above

3. A piece of metal of specific gravity 7 floats in mercury of specific gravity 13.6. What fraction of its volume is under mercury ?

   A. 0.5
   B. 0.4
   C. 0.515
   D. 0.5
   E. none of the above

4. Barometer is used to measure__________________?

   A. pressure in pipes, channels etc.
   B. atmospheric pressure
   C. very low pressure
   D. difference of pressure between two points
   E. rain level

5. The surface tension of mercury at normal temperature compared to that of water is____________________?

   A. more
   B. less
   C. same
   D. more or less depending on size of glass tube
   E. none of the above.

6. Viscosity of water in comparison to mercury is ______________________?

   A. higher
   B. lower
   C. same
   D. higher/lower depending on temperature
   E. unpredictable.

7. Mercury does not wet glass. This is due to property of liquid known as_________________?

   A. adhesion
   B. cohesion
   C. surface tension
   D. viscosity
   E. compressibility

8. Specific weight of sea water is more that of pure water because it contains ________________?

   A. dissolved air
   B. dissolved salt
   C. suspended matter
   D. all of the above
   E. heavy water

9. A bucket of water is hanging from a spring balance. An iron piece is suspended into water without touching sides of bucket from another support. The spring balance reading will__________________?

   A. increase
   B. decrease
   C. remain same
   D. increase/decrease depending on depth of immersion
   E. unpredictable

10. An open vessel of water is accelerated up an inclined plane. The free water surface will___________________?

    A. be horizontal
    B. make an angle in direction of inclination of inclined plane
    C. make an angle in opposite direction to inclination of inclined plane
    D. any one of above is possible
    E. none of the above