For a gas at a temperature the root-mean-square velocity ${\mathrm{v}}_{\mathrm{rms}}$ , the most probable speed ${\mathrm{v}}_{\mathrm{mp}}$ , and the average speed ${\mathrm{v}}_{\mathrm{av}}$ obey the relationship

1. ${\mathrm{v}}_{\mathrm{av}}>{\mathrm{v}}_{\mathrm{rms}}>{\mathrm{v}}_{\mathrm{mp}}$

2. ${\mathrm{v}}_{\mathrm{rms}}>{\mathrm{v}}_{\mathrm{av}}>{\mathrm{v}}_{\mathrm{mp}}$

3. ${\mathrm{v}}_{\mathrm{mp}}>{\mathrm{v}}_{\mathrm{av}}>{\mathrm{v}}_{\mathrm{rms}}$

4. ${\mathrm{v}}_{\mathrm{mp}}>{\mathrm{v}}_{\mathrm{rms}}>{\mathrm{v}}_{\mathrm{av}}$

Concept Questions :-

Types of velocity
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

If  and ${\mathrm{V}}_{\mathrm{O}}$ denote the root-mean square velocities of molecules of hydrogen, nitrogen and oxygen respectively at a given temperature, then

1. ${\mathrm{V}}_{\mathrm{N}}>{\mathrm{V}}_{\mathrm{O}}>{\mathrm{V}}_{\mathrm{H}}$

2. ${\mathrm{V}}_{\mathrm{H}}>{\mathrm{V}}_{\mathrm{N}}>{\mathrm{V}}_{\mathrm{O}}$

3. ${\mathrm{V}}_{\mathrm{O}}>{\mathrm{V}}_{\mathrm{N}}>{\mathrm{V}}_{\mathrm{H}}$

4. ${\mathrm{V}}_{\mathrm{O}}>{\mathrm{V}}_{\mathrm{H}}>{\mathrm{V}}_{\mathrm{N}}$

Concept Questions :-

Types of velocity
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

The r.m.s. speed of a group of 7 gas molecules having speeds  is

1.

2.

3.

4.

Concept Questions :-

Types of velocity
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

If the ratio of vapour density for hydrogen and oxygen is $\frac{1}{16}$ , then under constant pressure the ratio of their rms velocities will be

1. $\frac{4}{1}$

2. $\frac{1}{4}$

3. $\frac{1}{16}$

4. $\frac{16}{1}$

Concept Questions :-

Types of velocity
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

Molecular motion shows itself as

1. Temperature

2. Internal Energy

3. Friction

4. Viscosity

Concept Questions :-

Kinetic energy of gas

Difficulty Level:

What is the velocity of wave in monoatomic gas having pressure 1 kilopascal and density  ?

1.

2.

3.  Zero

4.  None of these

Concept Questions :-

Types of velocity
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

If the pressure in a closed vessel is reduced by drawing out some gas, the mean free path of the molecules

1. Is decreased

2. Is increased

3. Remains unchanged

4. Increases or decreases according to the nature of the gas

Concept Questions :-

Kinetic energy of gas
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

At constant volume, temperature is increased. Then

1. Collision on walls will be less

2. Number of collisions per unit time will increase

3. Collisions will be in straight lines

4. Collisions will not change

Concept Questions :-

Types of velocity
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

The r.m.s. speed of a certain gas is n at 400K. The temperature at which the r.m.s. speed becomes two times, will be

1.  800 K

2.  1600 K

3.  1200 K

3.  None of these

Concept Questions :-

Types of velocity
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

A cubical box with porous walls containing an equal number of ${\mathrm{O}}_{2}$ and ${\mathrm{H}}_{2}$ molecules is placed in a large evacuated chamber. The entire system is maintained at constant temperature T. The ratio of ${\mathrm{v}}_{\mathrm{rms}}$ of ${\mathrm{O}}_{2}$ molecules to that of the ${\mathrm{v}}_{\mathrm{rms}}$ of ${\mathrm{H}}_{2}$ molecules, found in the chamber outside the box after a short interval is

1.  $\frac{1}{2\sqrt{2}}$

2.  $\frac{1}{4}$

3.  $\frac{1}{\sqrt{2}}$

4.  $\sqrt{2}$

Concept Questions :-

Types of velocity