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Entry Test MCQ :: Liquids and Solids


11.  Hydrogen bonding is involved in
A. Solubility B. Cleansing action of detergents
C. Biological molecules D. All

12.  Actually the vapour pressure on the surface of liquid in the flask is equal to
A. ? h B. Pa - ?h
C. Pa + ?h D. Pt = Pa - ?h

13.  Forces of attraction which may be present between all kinds of atoms and molecules are
A. intramolecular B. intermolecular
C. van der Waal D. Dipole-induced dipole

14.  The density of water may be
A. Equal to that of ice B. Greater than that of ice
C. Less than that of ice D. All are possible

15.  The quantity of heat required to convert one mole of liquid into its vapours at its boiling point is called molar heat of
A. vaporization B. evaporation
C. crystallization D. sublimation

16.  Steam causes more sever burn than the boiling water because it possesses.
A. Latent heat of fusion B. Latent heat of vaporization
C. Latent heat of sublimation D. All of the above

17.  Water has maximum density at
A. 0?C B. 2?C
C. 4?C D. 100?C

18.  The conversion of vapours back into their liquid state is called
A. crystallization B. evaporization
C. vaporization D. condensation

19.  Formation of vapours from the surface of a liquid is called
A. vapourization B. evaporation
C. condensation D. cracking

20.  When water freezes at 0?C its density decreases due to
A. Change of bond angles B. Cubic structure of ice
C. Empty space present in the structure of ice D. Change of bond length




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