The absolute temperature of a gas is determined by

1. The average momentum of the molecules

2. The velocity of sound in the gas

3. The number of molecules in the gas

4. The mean square velocity of the molecules

Concept Questions :-

Types of velocity
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Difficulty Level:

At what temperature is the root mean square velocity of gaseous hydrogen molecules is equal to that of oxygen molecules at 47°C

1.  20 K

2.  80 K

3.  – 73 K

4.  3 K

Concept Questions :-

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

Difficulty Level:

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

1. ${\mathrm{m}}^{0}$

2. $\mathrm{m}$

3. $\sqrt{\mathrm{m}}$

4. $\frac{1}{\sqrt{\mathrm{m}}}$

Concept Questions :-

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

Difficulty Level:

At room temperature, the r.m.s. speed of the molecules of certain diatomic gas is found to be 1930 m/s. The gas is :

1. ${\mathrm{H}}_{2}$

2. ${\mathrm{F}}_{2}$

3. ${\mathrm{O}}_{2}$

4. ${\mathrm{Cl}}_{2}$

Concept Questions :-

Types of velocity
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Difficulty Level:

Moon has no atmosphere because :

1. The r.m.s. the velocity of all gases is more than the escape velocity from the moon's surface.

2. Its surface is not smooth.

3. It is quite far away from the earth.

4. It does not have a population and plants.

Concept Questions :-

Types of velocity
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Difficulty Level:

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

1. $\frac{3}{\mathrm{\gamma }}$

2. $\frac{\gamma }{3}$

3. $\sqrt{\frac{3}{\mathrm{\gamma }}}$

4. $\sqrt{\frac{\gamma }{3}}$

Concept Questions :-

Types of velocity
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Difficulty Level:

The molecules of a given mass of a gas have a r.m.s. velocity of 200 m/sec at 27°C and  pressure. When the temperature is 127°C and pressure is  the r.m.s. velocity in m/sec will be

1. $\frac{100\sqrt{2}}{3}$

2. $100\sqrt{2}$

3. $\frac{400}{\sqrt{3}}$

4. None of the above

Concept Questions :-

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

Difficulty Level:

Which of the following statement is true?

1. Absolute zero degree temperature is not zero energy temperature.

2. Two different gases at the same temperature pressure have equal root mean square velocities.

3. The root mean square speed of the molecules of different ideal gases, maintained at the same

temperature are the same.

4. Given sample of 1 cc of hydrogen and 1 cc of oxygen both at NTP; oxygen sample has a large

the number of molecules.

Concept Questions :-

Ideal gas
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Difficulty Level:

At which temperature the velocity of ${\mathrm{O}}_{2}$ molecules will be equal to the velocity of ${\mathrm{N}}_{2}$ molecules at 0°C

1. 40°C

2. 93°C

3. 39°C

4. Cannot be calculated

Concept Questions :-

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

Difficulty Level:

The respective speeds of the molecules are 1, 2, 3, 4 and 5 km/sec. The ratio of their r.m.s. velocity and the average velocity will be

1.

2.

3.

4.

Concept Questions :-

Types of velocity