VBQs Kinetic Theory Class 11 Physics with solutions has been provided below for standard students. We have provided chapter wise VBQ for Class 11 Physics with solutions. The following Kinetic Theory Class 11 Physics value based questions with answers will come in your exams. Students should understand the concepts and learn the solved cased based VBQs provided below. This will help you to get better marks in class 11 examinations.

**Kinetic Theory VBQs Class 11 Physics**

**Question. In Maxwell speed distribution curve v _{1} represents **

(a) r.m.s. speed

(b) Average speed

(c) Most probable speed

(d) Average velocity

## Answer

C

**Question. If ratio of density ρ and pressure P of an ideal gas is x, then the root mean square speed of gas molecules is**

(a) √3x

(b) √3/x

(c) √3x^{2}

(d) √3/x^{2}

## Answer

B

**Question. If the speed of sound in a gas is v and the rms velocity of the gas molecule is v _{rms}, then the ratio of v/v_{rms} = **

## Answer

D

**Question. The pressure and density of two di-atomic mixture of gases ( γ = 7/5) change adiabatically from (P, ρ) to (P′, ρ′ ). If P/P’ = 128 the value of ρ/ρ’ is equal to**

(a) 16

(b) 32

(c) 64

(d) 128

## Answer

B

**Question. n moles of ideal gas is heated at constant pressure from 50°C to 100°C, the increase in internal energy of the gas is **

## Answer

A

**Question. During an experiment an ideal gas obeys an additional law P2V = constant. The initial temperature and volume of the gas are T and V respectively. If it expands to a volume 2V, then its temperature will be**

(a) 2T

(b) √3T

(c) √2T

(d) T

## Answer

B

**Question. An insulated box containing 1 mole O3 gas of mass M moving with velocity v0 and suddenly stopped. ****Find the increase in temperature as a result of stopping the box**

## Answer

D

**Question. The specific heat of a diatomic gas undergoing the process P ^{2} = V5 is**

(a) 7/2R

(b) 31 R/4

(c) 39R/14

(d) 10 R/14

## Answer

A

**Question. A diatomic gas is at very high temperature T such that it possesses translatory, rotational as well as vibrational motion. The energy associated with each molecule due to their vibration is (k = Boltzman constant)**

(a) kT

(b) kT/2

(c) 2kT

(d) kT/4

## Answer

A

**Question. A mixture of ideal gases has 2 moles of He, 4 moles, of oxygen and 1 mole of ozone at absolute temperature T. The internal energy of mixture is **

(a) 13RT

(b) 11RT

(c) 16RT

(d) 14RT

## Answer

C

**Question. The rms speed of gas molecules of molecular weight M at temperature T is given by **

## Answer

D

**Question. If N1 and N2 are the number of air molecules in an open room in peak winter and peak summer respectively, then**

(a) N1 = N2

(b) N1 < N2

(c) N1 > N2

(d) N1 > 2N2

## Answer

C

**Question. If pressure of a gas is increased at constant temperature by 2%, then the rms velocity of the gas will**

(a) Increase by 2%

(b) Increase by 1%

(c) Not change

(d) Decrease by 1%

## Answer

C

**Question. The mean or average speed of gas molecules of a gas having molar mass M at absolute temperature T is given by**

(a) √(3RT/M)

(b) √(38RT/πM)

(c) √(2RT/M)

(d) √(8RT/M)

## Answer

B

**Question. A vessel contains a mixture of oxygen gas and hydrogen gas. The average kinetic energy of a H _{2} molecule is K_{1} and that of O_{2} molecule is K_{2}, then the ratio K_{1}/K_{2} is equal to (the temperature in the vessel is uniform)**

(a) 1 : 16

(b) 1 : 8

(c) 1 : 4

(d) 1 : 1

## Answer

D

**Question. The mean free path for a gas is equal to (n is the number density and d is the diameter of a molecule of the gas) **

## Answer

B

**Question. If pressure, absolute temperature and Boltzman constant for a gas are P, T and K respectively for a gas, then mean free path of the gas molecules of diameter d is **

## Answer

A

**Question. Four particles have speeds 2 c m/s, 3 c m/s, 4 c m/ s and 5 cm/s respectively. Their rms speed is**

(a) 3.5 c m/s

(b) √54 cm / s

(c) 27/2 cm / s

(d) √54/2 cm / s

## Answer

D

**Question. Four moles of O2 gas and two moles of Argon gas and one mole of water vapour is mixed. Then molar heat capacity at constant pressure of the mixture is**

(a) 16/7 R

(b) 7 /16 R

(c) R **(d) 23/7 R**

## Answer

D

**Question. Two gases of same amount under different pressure and volume. The graph of their total kinetic energy (K) versus volume (V) as shown in figure, then **

(a) P_{1} > P_{2}

(b) P_{1} < P_{2}

(c) P_{1} = P_{2}

(d) Cannot be calculate

## Answer

A

**Question. If E is the energy density of one mole of monoatomic in an ideal gas, then the pressure of the ideal gas is**

(a) P = 2/3 E

(b) P = 3/2 E

(c) P = 5/2 E

(d) P = 2/5 E

## Answer

A