Assertion :All molecules of an ideal gas move with the same speed. Reason: There is no attraction between the molecules in an ideal gas.
A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
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B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
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C
Assertion is correct but Reason is incorrect
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D
Assertion is incorrect but Reason is correct
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Solution
The correct option is D Assertion is incorrect but Reason is correct Individual gas molecules have different speeds. Collisions between these molecules can change individual molecular speeds, but this does not affect the overall average speed of the system.The lighter gas molecules will generally move faster than heavier gases at the same temperature. Attractive and repulsive forces between gas molecules is negligible between ideal gas molecules.