Multiple Choice Questions and Answers on Class 11 Chemistry Chapter 5 States of Matter

1 When you heat a sample of gas, what happens to the particles that make up the gas?

A The particles move faster.

B The particles break apart

C The particles get smaller

D The particles become more dense

Answer:The particles move faster.

2 If helium and methane are allowed to diffuse out of the container under the similar conditions of temperature and pressure, then the ratio of rate of diffusion of helium to methane is:

A 2 : 1

B 1 : 2

C 3 : 5

D 4 : 1

View Answer

Answer:2 : 1

3 The law, which states that at constant temperature, the volume of a given mass of gas is inversely proportional is pressure, is known as:

A Boyles law

B Charles law

C Combine gas law

D Avogadros law

View Answer

Answer:Boyles law

4 The rates of diffusion of gases are inversely proportional to square root of their densities . This statement refers to :

A Daltons Law

B Grahams Law

C Avogadros Law

D None of the Above

View Answer

Answer:Grahams Law

5 Falling drop of water is spherical due to:

A Hydrogen Bonding

B Surface Tension

C Capillary Action

D Vlscosity

View Answer

Answer:Surface Tension

6 The theory which explains that gases consist of molecules, which are in rapid option is known as:

A Daltons Atomic Theory

B Bohrs Theory

C Rutherfords Atomic Theory

D Kinetic Molecular Theory

View Answer

Answer: Kinetic Molecular Theory

7 The rise or fall of a liquid within a tube of small bore is called:

A Surface Tension

B Capillary Action

C Viscosity

D Formation of Curvature

View Answer

Answer:Capillary Action

8 The states of matter having no definite shape but definite volume:

A Gas

B Liquid

C Solid

D None of the Above

View Answer

Answer:Liquid

9 How many of the know elements exist as gases at 25°C?

A 9

B 11

C 12

D 15

View Answer

Answer:11

10 If 20cm³ gas at 1 atm. is expanded to 50 cm³ at constant T, then what is the final pressure

A 20 × 150

B 50 × 120

C 1 × 120 × 50

D None of these

View Answer

Answer:20 × 150

11 The volume of 2.8 g of carbon monoxide at 27°C and 0.0821 atm is

A 30 L

B 3 L

C 0.3 L

D 1.5 L

View Answer

Answer:30 L

12 In van der Waal equation of state of gas laws, the constant b is a measure of

A Intermolecular collisions per unit volume

B Intermolecular attraction

C Volume occupied by the molecules

D Intermolecular repulsions

View Answer

Answer:Volume occupied by the molecules

13 Which of the following statement is wrong for gases?

A Gases do not have definite shape and volume

B Volume of the gas is equal to the volume of the container confining the gas

C Confined gas exert uniform pressure on the wall of the container in all directions

D Mass of the gas cannot be determined by weighing a container in which it is contained

View Answer

Answer:Mass of the gas cannot be determined by weighing a container in which it is contained

14 The critical volumes of four gases A, B, C, D are respectively 0.025 L, 0.312 L, 0.245 L, 0.432 L, the gas with highest value of van der Wall constant b is

A A

B B

C C

D D

View Answer

Answer:D

15 The value of universal gas constant R depends on

A Temperature of Gas

B Volume of Gas

C Number of Moles of Gas

D Units of Volume,Temperature and Pressure

View Answer

Answer:Units of Volume,Temperature and Pressure

16 A gas deviates from ideal behavior at a high pressure because its molecules:

A Attract one another

B Show the Tyndall Effect

C Have kinetic energy

D Are bound by covalent bonds

View Answer

Answer:Attract one another

17 The state of matter that shows the uniformity of behavior :

A Solid Liquid

B Liquid

C Gas

D None of the Above

View Answer

Answer:Gas

18 The rate of diffusion methane is twice that of X. The molecular mass of X is

A 64.0

B 32.0

C 40

D 80

View Answer

Answer: 64.0

19 Name the liquid with higher vapour pressure in the following pairs:

A Alcohol, Water, Petrol

B Petrol, Water, Alcohol

C Alcohol, Petrol, Water

D None of these

View Answer

Answer:Alcohol, Petrol, Water

20 The vapour pressure of water at 300 K in a closed container is 0.4 atm. If the volume of container is doubled, its vapour pressure at 300 K will be

A 0.8 atm

B 0.2 atm

C 0.4 atm

D 0.6 atm

View Answer