Identify the correct order as indicated in the given diagram of different kind of speed of molecules of same gas.
vmp→ Most probable speed vrms→ Root mean square speed vav→ Average speed
A
vmp−3,vav−2,vrms−1
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B
vmp−1,vav−2,vrms−3
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C
vmp−2,vav−1,vrms−3
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D
vmp−3,vav−1,vrms−2
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Solution
The correct option is Bvmp−1,vav−2,vrms−3 We know that, vrms=√3RTM=√3k=1.7k [Let RTM=k] vav=√8RTπM=√8πk=1.6k vmp=√2RTM=√2k=1.4k We can see that, vrms>vav>vmp and speed at 3>2>1 Therefore, correct order is vmp−1,vav−2,vrms−3