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Question

# For gaseous state, if most probable speed is denoated by Câˆ—, average speed by Â¯Â¯Â¯Â¯C and mean square speed by C, then for a large number of molecules the ratios of these speeds are:

A
C:¯¯¯¯C:C=1.128:1.225:1
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B
C:¯¯¯¯C:C=1:1.128:1.225
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C
C:¯¯¯¯C:C=1:1.125:1.128
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D
C:¯¯¯¯C:C=1.225:1.128:1
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Solution

## The correct option is B C∗:¯¯¯¯C:C=1:1.128:1.225Most probable speed =C∗=√2RTMAverage speed =¯¯¯¯C=√8RTπMMean square speed =C=√3RTMC∗:¯¯¯¯C:C=1:1.128:1.225So, the correct option is B

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