Kinetic Theory of Gases Test

Result

Kinetic Theory of Gases Test - 61

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Weekly Quiz Competition

Question 1
4 / -1

The average translational energy and the r.m.s. speed of molecules in a sample of oxygen gas at 300 K are 6.21 × 10^–21J and 484 m/s respectively. The corresponding values at 600 K are nearly (assuming ideal gas behaviour)

A
12.42 × 10²¹ J, 968 m/s

B
8.78 × 10²¹ J, 684 m/s

C
6.21 × 10²¹ J, 968 m/s

D
12.42 × 10²¹ J, 684 m/s

Solution
Question 2
4 / -1

A polyatomic gas with n degrees of freedom has a mean energy per molecule given by
(N is Avogadro\'s number)

A

B

C

D

Solution
Question 3
4 / -1

At the same temperature and pressure and volume of two gases, which of the following quantities is constant

A
Total number of molecules

B
Average kinetic energy

C
Root mean square velocity

D
Mean free path

Solution
Question 4
4 / -1

If temperature of gas increases from 27°C to 927°C the K.E. will be

A
Double

B
Half

C
One fourth

D
Four times

Solution
Question 5
4 / -1

An ideal gas is filled in a vessel, then

A
If it is placed inside a moving train, its temperature increases

B
Its centre of mass move randomly

C
Its temperature remains constant in a moving car

D
None of the above

Solution
Question 6
4 / -1

The average kinetic energy of a helium atom at 30°C is

A
Less than 1 eV

B
A few keV

C
50 – 60 eV

D
13.6 eV

Solution
Question 7
4 / -1

The kinetic energy of one mole gas at 300 K temperature, is E. At 400 K temperature kinetic energy is E\'. The value of E\'/E is

A
1.33

B

C

D
2

Solution
Question 8
4 / -1

The capacity of a vessel is 3 litres. It contains 6 g oxygen, 8 g nitrogen and 5 g CO₂ mixture at 27°C. If R = 8.31 J/mole × kelvin, then the pressure in the vessel in N/m² will be (approx.)

A
5 × 10⁵

B
5 × 10⁴

C
10⁶

D
10⁵

Solution
Question 9
4 / -1

Vapour is injected at a uniform rate in a closed which was initially evacuated. The pressure in the vessel

A
Increases continuously

B
Decreases continuously

C
First increases and then decreases

D
First increases and then becomes constant
Question 10
4 / -1

In kinetic theory of gases, which of the following statements regarding elastic collision of the moleculesis wrong

A
Kinetic energy is lost in collisions

B
Kinetic energy remains constant in collision

C
Momentum is conserved in collision

D
Pressure of the gas remains constant in collisions