‘X’ ml of H2 gas effuses through a hole of a container in 5 seconds. The time taken for effusion of same volume of the gas specified below under identical conditions is
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a
10 seconds, He
b
20 seconds, O2
c
25 seconds, CO
d
35 seconds, CO2
answer is B.
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Detailed Solution
t2t1=M2M1 Since r1r2=M2M1=t2t1 Given , t1= 5 sec, M1= 2 Consider t2= 20 sec (from options)205=M22 ∴M2=32 (Oxygen)