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The equilibrium constant K(p1) and K(p2)...

The equilibrium constant `K_(p1)` and `K_(p2)` for the reactions `X hArr 2Y` and `Z hArr P+Q`, respectively, are in the ratio of `1:9`. If the degrees of dissociation of `X` and `Z` are equal, then the ratio of total pressure at equilibria is

A

`1 : 6`

B

`1 : 1`

C

`1 : 3`

D

`1 : 9`

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