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Two solid compounds X and Y dissociates ...

Two solid compounds `X` and `Y` dissociates at a certain temperature as follows
`X(s) hArr A(g)+2B(g),K_(p_1)=9xx10^(-3)atm^(3)`
`Y(s) hArr 2B(g)+C(g),K_(p_2)=4.5xx10^(-3)atm^(3)`
The total pressure of gases over a mixture of `X` and `Y` is `:`

A

4.5 atm

B

0.85 atm

C

0.6 atm

D

0.45 atm

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