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Question

At what temperature most probable speed of O2 molecules have the samevalue of root mean square speed of O2 molecules at 300 K?

A
150 K
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B
600 K
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C
750 K
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D
900 K
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Solution

The correct option is D 900 K
We know,
URMS=3RTM
UMP=2RTM
Given,
URMS=UMP
3TRMS=2TMP
So,
TMP=32×TRMS=450K

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