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Worksheets

More about Liquid chemistry

Total questions: 24

Worksheet time: 12mins

Name
Class
Date
1.

If we are given butane with boiling point 272.5 k and another butane with boiling point 261.3 k , then which butane has greater london dispersion forces?

a)

1st butane

b)

2nd butane

2.

Neon has smaller size than Xenon, then which of the following has greater london dispersion forces?

a)

Xenon

b)

Neon

3.

First molecule has london dispersion forces and a second molecule has dipole-dipole forces, then which of the following molecule has greater boiling point?

a)

first molecule

b)

second molecule

4.

Stronger the intermolecular forces,.........will be the rate of evaporation.

a)

slower

b)

faster

5.

At dynamic equilibrium,which of the following order is correct regarding rate of evaporation and condensation?

a)

evaporation>condensation

b)

evaporation<condensation

c)

evaporation=condensation

6.

Liquid with stronger intermolecular forces have.........vapour pressure.

a)

low

b)

high

c)

variable

7.

Vapour pressure of liquids ........with temperature.

a)

decreases

b)

increases

c)

variable

8.

If the vapour pressure of water at 250 C is 24 mm Hg, then vapour pressure at 50 0 C is ...........

a)

93 mm Hg

b)

355 mm Hg

c)

760 mm Hg

9.

Vapour pressure of liuid is measured by the ........in mercury level in barometric method.

a)

fall

b)

rise

10.

The vapour pressure of ether is..........at 250 C.

a)

760 mm Hg

b)

537 mm Hg

11.

The difference in mercury height gives the ........in manometric method.

a)

vapou pressure

b)

boiling point

c)

melting pont

12.

At boiling temperature which of the following is correct?

a)

vapour pressure>atmospheric pressure

b)

vapour pressure<atmospheric pressure

c)

vapour pressure=atmospheric pressure

13.

At boiling point , the temperature of liquid remains constant.

a)

True

b)

False

14.

At same atmospheric pressure , the boiling point of two liquids are..........

a)

same

b)

different

15.

Pressure Cooking is an example of .........pressure.

a)

increased

b)

decreased

16.

Vacuum distillation is an example of ...........pressure.

a)

increased

b)

decreased

17.

Glycerine boils at 2900 C under normal atmospheric pressure,but when pressure is ............. the boiling point decreases to 2100 C.

a)

increased

b)

reduced

18.

Polar substances have........value of molar heat of fusion,vapourization and sublimation.

a)

higher

b)

lower

19.

The molecules of liquid at the surface feels an inward net attraction , this is called as .............

a)

surface tension

b)

viscosity

20.

The surface tension of a liquid .........with increase in temperature.

a)

increases

b)

decreases

21.

Liquids like honey,or glycerine have.........viscosities.

a)

high

b)

low

22.

Molten sulphur at 1400C with ring shape is .........viscous than long chained sulphur molecule.

a)

less

b)

more

23.

Viscosity of liquid is taken relative to.........

a)

water

b)

ice

c)

vapours

24.

At liquid crystalline phase,liquid exists between ...........and clearing temperature.

a)

melting temperature

b)

boiling temperature