Kinetic Theory of Gases MCQ. We covered all the Kinetic Theory of Gases MCQ in this post for free so that you can practice well for the exam.
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MCQ on Kinetic Theory of Gases for NEET Students
The average translational kinetic energy of the molecules of gas will be treble if, at constant
(A) volume, its pressure is treble.
(B) temperature, its pressure is treble.
(C) pressure, its volume is one-third.
(D) temperature, its volume is treble.
Option a – volume, its pressure is treble.
The average kinetic energy of the molecules of a gas is
(A) independent of the absolute temperature of the gas.
(B) directly proportional to the absolute temperature of the gas.
(C) inversely proportional to the absolute temperature of the gas.
(D) directly proportional to the square of the absolute temperature of the gas.
Option b – directly proportional to the absolute temperature of the gas.
What is the temperature of an ideal gas whose molecules have an average kinetic energy of 1 EV
(A) 3590 °C
(B) 4460 °C
(C) 5197 °C
(D) 7457 °C
Option d – 7457 °C
If a beaker is completely filled with water at 4 °C, then it will overflow
(A) when heated, but not when cooled.
(B) when cooled, but not when heated.
(C) both when heated or cooled.
(D) when kept at a constant temperature.
Option c – both when heated or cooled.
If R is the universal gas constant, then the amount of heat needed to raise the temperature of 3 moles of a monoatomic gas from 273 K to 373 K, when no work is done is
(A) 100 R
(B) 300 R
(C) 450 R
(D) 500 R
Option c – 450 R
A perfect gas of volume 20 liter is compressed isothermally to a volume of 2 liters, the RMS speed of the molecules will
(A) increase by 5 times.
(B) decrease by 5 times.
(C) increase by 10 times.
(D) not change.
Option d – not change.
Two non-reactive monoatomic ideal gases have their atomic masses in the ratio 2 : 3. The ratio of their partial pressures when enclosed in a vessel kept at a constant temperature is 3 : 4. The ratio of their densities is
(A) 1 : 4
(B) 1 : 2
(C) 6 : 9
(D) 8 : 9
Option b – 1 : 2
An atom has …….. degrees of freedom.
(A) two
(B) three
(C) five
(D) seven
Option b – three
A triatomic gas has ……… degrees of freedom.
(A) two
(B) four
(C) six
(D) eight
Option c – six
The temperature of a gas is 73 °C. To what temperature should it be heated, so that the r.m.s. the velocity of the molecules be doubled?
(A) 357 °C
(B) 457 °C
(C) 527 °C
(D) 820 °C
Option c – 527 °C
One mole of an ideal monatomic gas requires 200 J of 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 10 K, then the heat required is
(A) 120 J
(B) 210 J
(C) 238 J
(D) 350 J
Option a – 120 J
The number of molecules in a gram molecule of a gas is called
(A) universal gas constant.
(B) Boltzmann constant.
(C) Avogadro’s number.
(D) Planck’s constant.
Option c – Avogadro’s number.
The ratio of the mean kinetic energy of oxygen and hydrogen at a given temperature is
(A) 1:16
(B) 1 : 8
(C) 1 : 4
(D) 1 : 1
Option d – 1 : 1
For an ideal monoatomic gas, the universal gas constant R is n times the molar heat capacity at constant pressure Cp, then the value of n is
(A) 0.4
(B) 0.67
(C) 1.4
(D) 1.67
Option a – 0.4
1 mole of a gas occupies a volume of 100 ml at 50 mm pressure. The volume occupied by four moles of gas at 100 mm pressure and at the same temperature is
(A) 50 ml
(B) 100 ml
(C) 200 ml
(D) 150 ml
Option c – 200 ml
If the R.M.S velocity of oxygen molecules at N.T.P is 0.5 km/s, then the R.M.S velocity for the hydrogen molecule at N.T.P is
(A) 4 km/s
(B) 2 km/s
(C) 3 km/s
(D) 1 km/s
Option b – 2 km/s
If the temperature of a gas is increased at constant volume, the time required to travel means free path ……..
(A) decreases.
(B) increases.
(C) becomes uncertain.
(D) remains constant.
Option a – decreases.
The temperature value for which Kelvin and Fahrenheit’s scales are equal is
(A) 574.25 °F
(B) 574.25 °C
(C) 100 °F
(D) 273 K
Option a – 574.25 °F
The temperature at which the mean kinetic energy of a molecule of an ideal gas will be tripled that at 337 °C is
(A) 540 °C
(B) 1527 °C
(C) 1356 °C
(D) 1629 °C
Option b – 1527 °C
According to the assumptions of the kinetic theory of gases, the gas molecules
(A) repel each other.
(B) collide elastically.
(C) move with uniform velocity.
(D) are massless particles.
Option b – collide elastically.
If the pressure is kept constant, then at what temperature will the r.m.s velocity of gas on behalf of its value at 0 °C?
(A) 0 °C
(B) 32 °C
(C) -273 °C
(D) -205 °C
Option d – -205 °C
The mass of He required to fill a 4.0-liter balloon to a pressure of 1.1 atm at 42 °C is
(A) 865 g
(B) 665 g
(C) 216 g
(D) 90 g
Option b – 665 g
A pyrometer is used for the measurement of
(A) higher temperature.
(B) lower temperature.
(C) latent heat.
(D) specific heat.
Option a – higher temperature.
The RMS velocity of the gas at T °C is double the value at 37 °C. The temperature T of the gas in °C is (assume that the pressure remains constant)
(A) 967
(B) 820
(C) 1000
(D) 195
Option a – 967
80 calories of heat are required to raise the temperature of a monoatomic gas at constant pressure from 30 °C to 35 °C. The amount of heat required to raise the temperature of the same gas through the same range (30 °C to 35 °C) at constant volume is
(A) 30 cal
(B) 48 cal
(C) 70 cal
(D) 105 cal
Option b – 48 cal
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