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Q.

Which of the following indicates RMS velocity of a gas?

a) 2RTM

b) 3Pd

c) 8RTπM

d) 1.58×TM×104 cm/sec

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a

c, d

b

a, c

c

b, d

d

a, b

answer is B.

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Detailed Solution

Formula Used: Vrms=3RTM 

Detailed Solution:

We know that 

Vrms=3RTM 

The equation 3Pdcan be obtained from ideal gas equation i.e. 

PV=nRT Pd=RTM

Vrms=3RTM=3×8.314×107ergs×TN               =1.58×TM×104cm/sec

Hence, b), and d) are correct.

Therefore, option(B) is the answer.

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