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Q.

Two gases A and B having the same volume diffuse through a porous partition in 20 and 10 seconds respectively. The molecular mass of A is 49 u . Molecular mass of B will be

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a

25.00 u

b

50.00 u

c

12.25 u

d

6.50 u

answer is C.

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Detailed Solution

rArB=MBMA⇒vAtA×tBvB=MBMA⇒1020=MB49⇒14=MB49∴MB=494=12.25
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