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Q. No.Consider the following statements for air molecules in an airtight container:
| I. | the average speed of molecules is larger than the root mean square speed. |
| II. | the mean free path of molecules is larger than the mean distance between molecules. |
| III. | the mean free path of molecules increases with temperature. |
| IV. | the RMS speed of a nitrogen molecule is smaller than an oxygen molecule. |
The true statements are:
| 1. | only II |
| 2. | II and III |
| 3. | II and IV |
| 4. | I, II, and IV |
Subtopic: Â Mean Free Path |
Level 3: 35%-60%
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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 |
Level 3: 35%-60%
JEE
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Q. No.
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