Kinetic Theory of Gases Test

Result

Kinetic Theory of Gases Test - 50

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Weekly Quiz Competition

Question 1
4 / -1

The root mean square velocity of the molecules in a sample of helium is 5/7th that of the molecules in a sample of hydrogen. If the temperature of hydrogen sample is 0°C, then the temperature of the helium sample is about

A
0°C

B
0 K

C
273°C

D
100°C

Solution
Question 2
4 / -1

For a gas, the r.m.s. speed at 800 K is

A
Four times the value of 200 K

B
Half the vale of 200 K

C
Twice the value of 200 K

D
Same as at 200 K

Solution
Question 3
4 / -1

The root mean square velocity of a gas molecules of mass m at a given temperature is proportional to

A

B

C

D

Solution
Question 4
4 / -1

A sample of gas is at 0°C. To what temperature it must be raised in order to double the r.m.s speed of the molecule

A
270°C

B
819°C

C
1090°C

D
100°C

Solution
Question 5
4 / -1

A gas is allowed to expand isothermally. The root mean square velocity of the molecules

A
Will increase

B
Will decrease

C
Will remain unchanged

D
Depends on the other factors
Question 6
4 / -1

What is the velocity of wave in mono atomic gas having pressure 1 kilo pascal and density 2.6 kg/m³

A
3.6 m/s

B
8.9 × 10³ m/s

C
Zero

D
None of these

Solution
Question 7
4 / -1

Speed of sound in a gas is v and r.m.s velocity of the gas molecules is c. The ratio of v to c is

A

B

C

D

Solution
Question 8
4 / -1

The molecules of a given mass of a gas have a r.m.s. velocity of 200 m/s at 27°C and 1.0 × 10⁵ N/m² pressure. When the temperature is 127°C and pressure is 0.5 × 10⁵ N/m², the r.m.s velocity in m/s will be

A

B

C

D
None of these

Solution
Question 9
4 / -1

According to the kinetic theory of gases, at absolute temperature

A
Water freezes

B
Liquid helium freezes

C
Molecular motion stops

D
Liquid hydrogen freezes

Solution
Question 10
4 / -1

Molecular motion shows itself as

A
Temperature

B
Internal Energy

C
Friction

D
Viscosity