Without change in temperature, a gas is forced in a smaller volume. Its pressure increases because its molecules:

1. strike the unit area of the container wall more often.
2. strike the unit area of the container wall at a higher speed.
3. strike the unit area of the container wall with greater force.
4. have more energy.

Subtopic:  Kinetic Energy of an Ideal Gas |
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A gas at pressure P0 is contained in a vessel. If the masses of all the molecules are halved and their speeds doubled, the resulting pressure would be:

1. 4P0

2. 2P0

3. P0

4. P02

Subtopic:  Kinetic Energy of an Ideal Gas |
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The mean free path for a gas, with molecular diameter \(d\) and number density \(n,\) can be expressed as:
1. \( \frac{1}{\sqrt{2} n \pi \mathrm{d}^2} \)
2. \( \frac{1}{\sqrt{2} n^2 \pi \mathrm{d}^2} \)
3. \(\frac{1}{\sqrt{2} n^2 \pi^2 d^2} \)
4. \( \frac{1}{\sqrt{2} n \pi \mathrm{d}}\)

Subtopic:  Mean Free Path |
 81%
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If at a pressure of \(10^6\) dyne/cm2, one gram of nitrogen occupies \(2\times10^4\) c.c. volume, then the average energy of a nitrogen molecule in erg is:

1. \(14\times10^{-13}\) 2. \(10\times10^{-12}\)
3. \(10^{6}\) 4. \(2\times10^{6}\)
Subtopic:  Kinetic Energy of an Ideal Gas |
 53%
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The graph between volume and temperature in Charle's law is?
1. an ellipse
2. a circle
3. a straight line
4. a parabola

Subtopic:  Ideal Gas Equation |
 88%
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If the pressure of a gas is doubled, then the average kinetic energy per unit volume of the gas will be:

1. half of its initial value. 2. double its initial value.
3. one-fourth of its initial value. 4. four times its initial value.
Subtopic:  Kinetic Energy of an Ideal Gas |
 82%
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The translational kinetic energy of moles of a diatomic gas at absolute temperature is given by:
1. 52nRT
2. 32nRT
3. 5nRT
4. 72nRT

Subtopic:  Kinetic Energy of an Ideal Gas |
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Two isotherms are drawn at temperatures T1 and T2 as shown. The ratio of mean speed  at T1 and T2 is:
  

1. 1: 4 2. 1: 2
3. 2: 1 4. 4: 1
Subtopic:  Types of Velocities |
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The translational kinetic energy of oxygen molecules at room temperature is 60 J. Their rotational kinetic energy will be?

1. 40 J

2. 60 J

3. 50 J

4. 20 J

Subtopic:  Law of Equipartition of Energy |
 68%
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When the gas in an open container is heated, the mean free path:

1. Increases
2. Decreases
3. Remains the same
4. Any of the above depending on the molar mass

Subtopic:  Mean Free Path |
 58%
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