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Consider the following equilibrium react...

Consider the following equilibrium reactions at `25^oC`,
`A(g)+3B(g)hArr2C(g),K_(eq)=x`
`A(g)+D(g)hArr2E(g),K_(eq)=y`
`B(g)+D(g)hArrF(g),K_(eq)=z`
then the value of equilibrium constant for the reaction `2C+4DhArr2E+3F`, at `25^oC` is

A

`frac{yz^3}{x}`

B

`frac{xy}{z^3}`

C

`frac{xz}{y}`

D

`frac{y^2z}{x}`

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