Kinetic Theory of Gases Test

Result

Kinetic Theory of Gases Test - 35

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Weekly Quiz Competition

Question 1
4 / -1

A gas is filled in the cylinder shown in the figure. The two pistons are joined by a string. If the gas is heated, the pistons will

A
Move towards left

B
Move towards right

C
Remain stationary

D
None of these
Question 2
4 / -1

A closed vessel contains 8g of oxygen and 7g of nitrogen. The total pressure is 10 atm at a given temperature. If now oxygen is absorbed by introducing a suitable absorbent pressure of the remaining gas in atm will be

A
2

B
10

C
4

D
5

Solution
Question 3
4 / -1

CO₂(O–C–O) is a triatomic gas. Mean kinetic energy of one gram gas will be (If N-Avogadro\'s number, k-Boltzmann\'s constant and molecular weight of CO₂ = 44)

A
(3/88) NkT

B
(5/88) NkT

C
(6/88) NkT

D
(7/88) NkT

Solution
Question 4
4 / -1

40 calories of heat is needed to raise the temperature of 1 mole of an ideal monoatomic gas from 20°C to 30°C at a constant pressure. The amount of heat required to raise its temperature over the same interval at a constant volume (R = 2 cal mole^–1 K^–1) is

A
20 cal

B
40 cal

C
60 cal

D
80 cal

Solution
Question 5
4 / -1

Find the ratio of specific heat at constant pressure to the specific heat constant volume for NH₃

A
1.33

B
1.44

C
1.28

D
1.67

Solution
Question 6
4 / -1

The pressure and volume of saturated water vapour are P and V respectively. It is compressed isothermally thereby volume becomes V/2, the final pressure will be

A
More than 2P

B
P

C
2P

D
4P
Question 7
4 / -1

If the intermolecular forces vanish away, the volume occupied by the molecules contained in 4.5 kg water at standard temperature and pressure will be

A
5.6 m³

B
4.5 m³

C
11.2 litres

D
11.2 m³

Solution
Question 8
4 / -1

When an air bubble of radius \'r\' rises from the bottom to the surface of a lake, its radius becomes 5r/4 (the pressure of the atmosphere is equal to the 10 m height of water column). If the temperature is constant and the surface tension is neglected, the depth of the lake is

A
3.53 m

B
6.53 m

C
9.53 m

D
12.53 m

Solution
Question 9
4 / -1

A horizontal uniform glass tube of 100 cm, length sealed at both ends contain 10 cm mercury column in the middle. The temperature and pressure of air on either side of mercury column are respectively 81°C and 76 cm of mercury. If the air column at one end is kept at 0°C and the other end at 273°C, the pressure of air which is at 0°C is (in cm of Hg)

A
76

B
68.2

C
102.4

D
122

Solution
Question 10
4 / -1

The temperature of 5 moles of a gas which was held at constant volume was changed from 100°C to 120°C. The change in internal energy was found to be 80 J. The total heat capacity of the gas at constant volume will be equal to

A
8 J/K

B
0.8 J/K

C
4.0 J/K

D
0.4 J/K

Solution