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For which of the following reaction, the...

For which of the following reaction, the degree of dissociation `(alpha)` and equilibrium constant `(K_(p))` are related as `K_(p)=(4alpha^(2)P)/((1-alpha))?`

A

`N_(2)O_(4(g))hArr2NO_(2)(g)`

B

`H_(2(g))+I_(2(g))hArr2HI(g)`

C

`N_(2(g))+3H_(2(g))hArr2NH_(3(g))`

D

`PCl_(3(g))+Cl_(2(g))hArrPCl_(5(g))`

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The correct Answer is:
A
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