Kinetic Theory of Gases Test

Result

Kinetic Theory of Gases Test - 30

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Weekly Quiz Competition

Question 1
4 / -1

A box contains n molecules of a gas. How will the pressure of the gas be effected, if the number of molecules is made 2n?

A
Pressure will decrease

B
Pressure will remain unchanged

C
Pressure will doubled

D
Pressure will become three times

Solution
Question 2
4 / -1

A cylinder of capacity 20 litres is filled with H₂ gas. The total average kinetic energy of translatory motion of its molecules is 1.5 × 10⁵ J. The pressure of hydrogen in the cylinder is

A
2 × 10⁶ N/m²

B
3 × 10⁶ N/m²

C
4 × 10⁵ N/m²

D
5 × 10⁵ N/m²

Solution
Question 3
4 / -1

The root mean square speed of hydrogen molecules of an ideal hydrogen gas kept in a gas chamber at 0°C is 3180 m/sec. The pressure on the hydrogen gas is (Density of hydrogen gas is 8.99 × 10^–2 kg/m³, 1 atmosphere = 1.01 × 10⁵ N/m²)

A
1.0 atm

B
1.5 atm

C
2.0 atm

D
3.0 atm

Solution
Question 4
4 / -1

Consider a gas with density ρ and ¯c as the root mean square velocity of its molecules contained in a volume. If the system moves as whole with velocity v, then the pressure exerted by the gas is

A

B

C

D

Solution
Question 5
4 / -1

One kg of a diatomic gas is at a pressure of 8 × 10⁴ N/m². The density of the gas is 4 kg/m³. What is the energy of the gas due to its thermal motion?

A
3 × 10⁴ J

B
5 × 10⁴ J

C
6 × 10⁴ J

D
7 × 10⁴ J

Solution
Question 6
4 / -1

For a diatomic gas change in internal energy for unit change in temperature for constant pressure and constant volume is U₁ and U₂ respectively. U₁ : U₂ is

A
5 : 3

B
3 : 5

C
1 : 1

D
5 : 7

Solution
Question 7
4 / -1

The average kinetic energy of a gas at –23° C and 75 cm pressure is 5 × 10^–14 erg for H₂. The mean kinetic energy of the O₂ at 227°C and 150 cm pressure will be

A
80 × 10^–14 erg

B
20 × 10^–14 erg

C
40 × 10^–14 erg

D
10 × 10^–14 erg

Solution
Question 8
4 / -1

The ratio of mean kinetic energy of hydrogen and nitrogen at temperature 300 K and 450 K respectively is

A
3 : 2

B
2 : 3

C
2 : 1

D
4 : 9

Solution
Question 9
4 / -1

The average kinetic energy of a gas molecules can be determined by knowing

A
The number of molecules in the gas

B
The pressure of the gas only

C
The temperature of the gas only

D
None of the above is enough by itself

Solution
Question 10
4 / -1

Mean kinetic energy (or average energy) per g molecule of a monoatomic gas is given by

A

B

C

D

Solution