Chemistry 11 Chapter 4 Liquids and Solids Test 16

Chemistry 11 Chapter 4
Liquids and Solids
Test 16

1. The number of molecules leaving the surface is ______ number of molecules coming back into it at constant temperature?

a) Equal to
b) None of these
c) Not equal to
d) Different from

2. The spontaneous change of a liquid into its vapours is called?

a) Sublimation
b) Evaporation
c) none of these
d) condensation

3. If the intermolecular forces of attraction are weak then rate of Evaporation_______?

a) slower
b) Remain constant
c) faster
d) None of these

4. Evaporation causes_____?

a) Heating
b) Both
c) Cooling
d) None of these

5. The pressure exerted by the vapours of the liquid in equilibrium with the liquid at a given temperature is called?

a) Sublimation
b) Evaporation
c) Vapour pressure
d) Osmotic pressure

6. At high temperature the rate of Evaporation_______?

a) Decreases
b) None of these
c) Remain constant
d) Increases

7. _______ is of vital importance in the thread making materials?

a) Dipole-induced dipole forces
b) Dipole-Dipole Forces
c) Ion-Dipole Forces
d) Hydrogen bonding

8. The amount of heat required to vapourize one mole of a liquid at its boiling point is called its?

a) Molar heat of vapourization
b) Molar heat of Fusion
c) None of these
d) Molar heat of sublimation

9. Evaporation occurs at______?

a) Some temperature
b) None of these
c) Specific temperature
d) All temperature

10. Gasoline evaporates much _____ than water due to London forces of attraction?a) slower
b) Remain constant
c) Faster
d) None of these

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