MCQ Questions for Class 11 Physics Chapter 13 Kinetic Theory with Answers

Here you will find NCERT MCQ Questions for Class 11 Physics with Answers PDF Free Download based on the important concepts and topics given in the textbook as per CBSE new exam pattern. This may assist you to understand and check your knowledge about the chapters. Students also can take a free test of the Multiple Choice Questions of Class 11 Physics. Each question has four options followed by the right answer. These MCQ Questions are selected supported by the newest exam pattern as announced by CBSE.

Q1. Energy supplied to convert unit mass of substance from solid to liquid state at its melting point is called

(a) Latent heat of fusion
(b) Evaporation
(c) Solidification
(d) Latent heat of fission

(a) Latent heat of fusion

Q2. Which of the following is the unit of specific

(a) J kg/°c
(b) J/kg°c
(c) kg°c/J
(d) J kg/°c²

(b) J/kg°c

Q3. An ideal gas is that which can

(a) Be solidified
(b) Liquefied
(c) Not be liquefied
(d) Not be solidified

Q4. One mole of an ideal gas requires 207 J heat to raise the temperature by 10 K, when heated at constant pressure. If the same gas is heated at constant volume to raise the temperature by 10K, then heat required is

(a) 96.6 J
(b) 124 J
(c) 198.8 J
(d) 215.4 J

(b) 124 J

Q5. If 2 kcal, of heat is supplied to a system cause to change the internal energy of a gas is 5030 J, and external work done is 3350 J, then what is mechanical equivalent of heat?

(a) 41.90 J/kcal
(b) 4190 J/cal
(c) 4.19 J/kcal
(d) 4.19 J/cal

(d) 4.19 J/cal

Q6. For a gas, the r.m.s. speed at 800K is

(a) Half the value at 200 K
(b) Double the value at 200 K
(c) Same as at 200 K
(d) Four times the value at 200 K

(b) Double the value at 200 K

Q7. The specific heat of a gas

(a) Has only one value
(b) Has two values CP and CV
(c) Is proportional to the square root of its absolute temperature
(d) Can have any value between 0 and infinity

(d) Can have any value between 0 and infinity

Q8. The phenomenon of Browninan movement may be taken as evidence of

a) kinetic theory of matter
b) electromagnetic theory of radiation
c) corpuscular theory of light
d) photoelectric phenomenon

a) kinetic theory of matter

Q9. According to kinetic theory of gases, at absolute zero temperature

a) molecular motion stops
b) liquid hydrogen freezes
c) liquid helium freezes
d) water freezes

a) molecular motion stops

Q10. At a given temperature the force between molecules of a gas as a function of intermolecular distance is

a) first decreases and then increases
b) always increases
c) always decreases
d) always constant

a) first decreases and then increases

Q11. Real gases show mark able deviation from that of ideal gas behavior at

(a) High temperature and low pressure
(b) Low temperature and high pressure
(c) High temperature and high pressure
(d) Low temperature and low pressure

(b) Low temperature and high pressure

Q12. One mole of mono atomic gas (g = 5/3) is mixed with one mole of diatomic gas (g = 7/5) what will be the value of g for the mixture?

(a) 1.5
(b) 2.5
(c) 1.0
(d) 2

(a) 1.5

Q13. A room temperature the r.m.s. velocity of the molecules of a certain diatomic gas is found to be 1930 m/sec. the gas is

(a) H²
(b) F²
(c) O²
(d) Cl²

(a) H²

Q14. The temperature at which the r.m.s. velocity of H² becomes escape velocity from the earth is,

(a) 10059°C
(b) 10059 K
(c) 10332°C
(d) 10332 K

(b) 10059 K

Q15. The average kinetic energy of the molecules of a gas at 27°C is 9 10-20 J. what is its average K.E. at 227°C?

(a) 5 10-20 J
(b) 10 10-20 J
(c) 15 10-20 J
(d) 20 10-20 J

Q16. Moon has no atmosphere because

(a) It is far away form the surface of the earth
(b) Its surface temperature is 10°C
(c) The r.m.s. velocity of all the gas molecules is more then the escape velocity of the moons surface
(d) The escape velocity of the moons surface is more than the r.m.s velocity of all molecules

Q17. At a certain temperature, hydrogen molecules have r.m.s. velocity of 3 km/s. what is the r.m.s velocity of the oxygen molecules at the same temperature?

(a) 0.25 km/s
(b) 0.5 km/s
(c) 0.75 km/s
(d) 6 km/s

Q18. Latent heat of ice is

(a) Less than external latent heat of fusion
(b) Equal to external latent heat of fusion
(c) More then external latent heat of fusion
(d) Twice the external latent heat of fusion

Q19. Energy supplied to convert unit mass of substance from solid to liquid state at its melting point is called