Write the appropriate equilibrium constant expression $K_{c}$ for the following reaction:
$2 C O (g) + O_{2} (g) ⟺ 2 {C O}_{2} (g)$

K_{c} = {k [C O]}^{2} [O_{2}]

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K_{c} = \frac{{[C O]}^{2} [O_{2}]}{{[{C O}_{2}]}^{2}}

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K_{c} = \frac{[{C O}_{2}]}{[C O] [O_{2}]}

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K_{c} = \frac{{[{C O}_{2}]}^{2}}{{[C O]}^{2} [O_{2}]}

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Solution

The correct option is D $K_{c} = \frac{{[{C O}_{2}]}^{2}}{{[C O]}^{2} [O_{2}]}$
Equilibrium constant; $K_{c}$ for the given equation; $2 C O + O_{2} ⇌ 2 C O_{2}$ can be written as:
$K_{c} = \frac{[C O_{2}]^{2}}{[C O]^{2} [O_{2}]}$

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