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Vapour density of the equilibrium mixtur...

Vapour density of the equilibrium mixture of `NO_(2)` and `N_(2)O_(4)` is found to be `40` for the equilibrium
`N_(2)O_(4) hArr 2NO_(2)`
Calculate

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Verified by Experts

The correct Answer is:
B
a. `N_(2)O_(4) hArr 2NO_(2)`
Observed value of vapour density `(d)=40`
Hence, abnormal molecular weight `=40xx2=80`
b. `Dxx2`= Theoretical molecular weight
`:. D=92/2=46`
`:. x=(D-d)/d=(46-40)/40=0.15`
c. `{:(,N_(2)O_(4),hArr,2NO_(2)),("Initial",1,,0),("At equilibrium",(1-x),,2x),(,0.85,,0.30):}`
Total moles at equilibrium `=(1+x)=1+0.15=1.15`
`:.` Percentage of `NO_(2)=(2x)/(1+x)xx100`
`=0.30/1.15xx100=26.08%`
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