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Class 11th Physics - Kinetic Theory - MERIT YARD

Question 1 / 40Boyle's Law is applicable at constant:

A) Pressure

B) Temperature

C) Volume

D) Density

Question 2 / 40Charle's Law states that at constant pressure, volume of a gas is proportional to:

A) Absolute Temperature

B) Square root of temperature

C) Pressure

D) Mass

Question 3 / 40The value of Avogadro's number is:

A) 6.022 x 10²³

B) 6.022 x 10²²

C) 6.022 x 10²⁴

D) 6.022 x 10²³ per mole

Question 4 / 40At absolute zero temperature (-273.15 °C), the kinetic energy of molecules becomes:

A) Maximum

B) Infinite

C) Zero

D) Negative

Question 5 / 40The pressure P exerted by an ideal gas is given by:

A) 1/3 ρ v²

B) 1/2 ρ v²

C) 2/3 ρ v²

D) ρ v²

Question 6 / 40The degree of freedom for a monatomic gas (like Helium) is:

A) 5

B) 3

C) 6

D) 2

Question 7 / 40The degree of freedom for a diatomic gas (like Oxygen) at normal temperature is:

A) 3

B) 5

C) 7

D) 6

Question 8 / 40The average kinetic energy per molecule of a gas is:

A) 1/2 kT

B) 3/2 kT

C) kT

D) 5/2 kT

Question 9 / 40The RMS speed of gas molecules is proportional to:

A) T

B) √T

C) T²

D) 1/T

Question 10 / 40The mean free path of gas molecules decreases with:

A) Increase in density

B) Decrease in pressure

C) Increase in temperature

D) Increase in volume

Question 11 / 40The value of Universal Gas Constant (R) is:

A) 8.31 J/mol-K

B) 0.0821 L-atm/mol-K

C) 1.98 cal/mol-K

D) All of the above

Question 12 / 40Which gas has the highest RMS speed at a given temperature?

A) Hydrogen

B) Oxygen

C) Nitrogen

D) Carbon dioxide

Question 13 / 40If the temperature of a gas is increased 4 times, its RMS speed becomes:

A) 4 times

B) 2 times

C) 16 times

D) Half

Question 14 / 40Dalton's law of partial pressures is applicable to:

A) Reacting gases

B) Non-reacting gases

C) Only noble gases

D) Only solids

Question 15 / 40According to the law of equipartition of energy, energy associated with each degree of freedom is:

A) 1/2 kT

B) 3/2 kT

C) kT

D) 1/2 RT

Question 16 / 40The ratio of Cp/Cv (γ) for a monatomic gas is:

A) 1.40

B) 1.67

C) 1.33

D) 1.00

Question 17 / 40Specific heat capacity of a gas at constant volume (Cv) for a monatomic gas is:

A) 1/2 R

B) 3/2 R

C) 5/2 R

D) 3 R

Question 18 / 40Mean free path (λ) is inversely proportional to:

A) Temperature

B) Density of the gas

C) Volume

D) Speed of molecules

Question 19 / 40A real gas behaves as an ideal gas at:

A) Low Temperature, High Pressure

B) High Temperature, Low Pressure

C) High Temperature, High Pressure

D) 0 °C and 1 atm

Question 20 / 40The number of molecules in 22.4 liters of a gas at STP is:

A) 10²³

B) 1

C) 6.022 x 10²²

D) 6.022 x 10²³

Question 21 / 40The volume of 1 mole of an ideal gas at STP is:

A) 11.2 Liters

B) 22.4 Liters

C) 44.8 Liters

D) 1 Liter

Question 22 / 40The ratio of Cp/Cv for a diatomic gas is:

A) 7/5 (1.40)

B) 5/3 (1.67)

C) 4/3 (1.33)

D) 1

Question 23 / 40Ideal gas equation for 'n' moles of gas is:

A) PV = RT

B) PV = nRT

C) P/V = nRT

D) PV = kT

Question 24 / 40Boltzmann constant (k) is equal to:

A) R / N_A

B) R x N_A

C) N_A / R

D) 1 / R

Question 25 / 40Pressure of a gas is due to:

A) Repulsion between molecules

B) Collision of molecules with walls

C) Attraction of Earth

D) Size of molecules

Question 26 / 40Internal energy of a monatomic ideal gas is:

A) 1/2 nRT

B) 3/2 nRT

C) 5/2 nRT

D) nRT

Question 27 / 40Mean free path λ is given by:

A) 1 / (√2 π d² n)

B) √2 π d² n

C) 1 / (π d² n)

D) d² / n

Question 28 / 40Degrees of freedom for a non-linear triatomic gas (like H₂O) is:

A) 3

B) 5

C) 6

D) 7

Question 29 / 40At constant volume, the pressure of a fixed mass of gas is directly proportional to its absolute temperature. This is:

A) Boyle's Law

B) Charle's Law

C) Gay-Lussac's Law

D) Avogadro's Law

Question 30 / 40For an ideal gas, Cv = 5/2 R. The gas is:

A) Monatomic

B) Diatomic

C) Triatomic

D) None

Question 31 / 40What is the value of Boltzmann constant?

A) 1.38 x 10^-23 J/K

B) 8.31 J/K

C) 6.6 x 10^-34 J-s

D) 1.6 x 10^-19 J

Question 32 / 40In an ideal gas, there is:

A) Large force of attraction

B) Small force of attraction

C) No force of attraction

D) Only repulsion

Question 33 / 40If the pressure of a gas is doubled at constant temperature, its volume becomes:

A) Double

B) Half

C) Four times

D) Unchanged

Question 34 / 40The number of degrees of freedom of a rigid body is:

A) 1

B) 3

C) 6

D) 9

Question 35 / 40The kinetic energy of 1 mole of an ideal gas at T Kelvin is:

A) 1/2 RT

B) 3/2 RT

C) RT

D) 5/2 RT

Question 36 / 40Specific heat of a gas at constant pressure (Cp) is always:

A) Greater than Cv

B) Less than Cv

C) Equal to Cv

D) Zero

Question 37 / 40 Brownian motion is due to:

A) Gravity

B) Collision of molecules

C) Convection

D) Radiation

Question 38 / 40The ratio Cp/Cv for triatomic gas (non-linear) is:

A) 1.67

B) 1.40

C) 1.33

D) 1.25

Question 39 / 40Degrees of freedom for a linear triatomic molecule (like CO₂) is:

A) 3

B) 5

C) 6

D) 4

Question 40 / 40According to KTG, the size of molecules is ________ compared to the distance between them.

A) Large

B) Equal

C) Negligible

D) Infinite

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