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Q.

Gaseous compound X-contains 44.4% carbon 51.9% nitrogen and 3.7% hydrogen. Under similar conditions 50cc of x is diffused through a porous plug in 25sec and same volume of hydrogen diffused in 6.8 sec, the molecular formula of “X” is

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a

HCN

b

CH3NH2

c

CH3NO2

d

PhCN

answer is A.

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Detailed Solution

[Step-1] : C=44.412=3.7⇒1N=51.914=3.7⇒1H=3.71=3.7⇒1Formula :HCN[Step-2]: r1r2=M2M1=V1t1×t2V2M2M1=6.825M1=27⇒HCN
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