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Q. No.An ideal gas is confined in a closed container and slowly heated. As the temperature rises, which of the following statements are correct?
| (A) | The mean free path of gas molecules decreases. |
| (B) | The mean collision time between the molecules decreases. |
| (C) | The mean free path remains unchanged. |
| (D) | The mean collision time remains unchanged. |
Choose the correct option from the given ones:
| 1. | (C) and (D) only |
| 2. | (A) and (B) only |
| 3. | (A) and (D) only |
| 4. | (B) and (C) only |
Subtopic: Â Mean Free Path |
From NCERT
JEE
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If the ratio of the number density per cm3 of the two gases is \(5:3\) and the ratio of the diameters of the molecules of the two gases is \(4:5,\) then, the ratio of the mean free path of molecules of two gases is:
| 1. | \(\dfrac{16}{15}\) | 2. | \(\dfrac{15}{16}\) |
| 3. | \(\dfrac{3}{4}\) | 4. | \(\dfrac{4}{3}\) |
Subtopic: Â Mean Free Path |
 72%
From NCERT
JEE
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According to the kinetic theory of gases,
Choose the most appropriate answer from the options given below:
| (A) | the motion of the gas molecules freezes at \(0^\circ\text C.\) |
| (B) | the mean free path of gas molecules decreases if the density of molecules is increased. |
| (C) | the mean free path of gas molecules increases if the temperature is increased keeping the pressure constant. |
| (D) | average kinetic energy per molecule per degree of freedom is \(\dfrac32k_B T\) (for monoatomic gases). |
| 1. | (A) and (C) only |
| 2. | (B) and (C) only |
| 3. | (A) and (B) only |
| 4. | (C) and (D) only |
Subtopic: Â Mean Free Path |
 59%
From NCERT
JEE
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NEET 2026 - Target Batch - Vital
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NEET 2026 - Target Batch - Vital
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