1.

In the equilibrium, `2AhArrB+C,` the equilibrium concentrations of `A.B and C at 300K` are `3xx10^(-4)M, 1xx10^(-4)M and 4.5xx10^(-4)M` respectively. Thte vlue of `K_(c)` for the above equilibrium at 300 K isA. `0.5`B. `0.05`C. `5.0`D. `1.5`

Answer» Correct Answer - A
For the equlibrium,
`2AhArrB+C`
`K_(c)=([B][C])/([A]^(2))`
`where [B]=1xx10^(-4)M,[C]=4.5xx10^(-4)M and [A]=3xx10^(-4)M`
Then `k_(c)=((1xx10^(-4))(4.5xx10^(-4)))/((3xx10^(-4))^(2))=(4.5)/(9)=0.5`


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