1.

`1`mole `NH_(3)` gas is introduced in a `4 litre` vessel containing `5gram` of He and heated at `400K` temperature. `NH_(3)` is `40%` dissociated and following equilubrium is established `:-` `NH_(3)hArr(1)/(2)N_(2)+(3)/(2)H_(2)` Find total pressure at equilibrium `:-`A. `2.87atm`B. `21.76atm`C. `2.17atm`D. `28.7atm`

Answer» Correct Answer - B
PV=nRT
`P(4)=2.65xx0.0821xx400`
`n_(He)=(5)/(4)=1.25`
`n(NH_(3)+H_(2)+N_(2))=1.4`


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