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Chemistry Question on Equilibrium

In a chemical equilibrium reaction, aA+bB⇋cC+dD, aA+ bB \leftrightharpoons cC + dD, which of the following is correct?

A

Kc=[A]a[B]b[C]c[D]dK_{c}=\frac{\left[A\right]^{a} \left[B\right]^{b}}{\left[C\right]^{c} \left[D\right]^{d}}

B

Kc=[C]c[D]d[A]a[B]bK_{c}=\frac{\left[C\right]^{c} \left[D\right]^{d}}{\left[A\right]^{a} \left[B\right]^{b}}

C

Kc=[A]a[B]bK_{c}=\left[A\right]^{a} \left[B\right]^{b}

D

None of these

Answer

Kc=[C]c[D]d[A]a[B]bK_{c}=\frac{\left[C\right]^{c} \left[D\right]^{d}}{\left[A\right]^{a} \left[B\right]^{b}}

Explanation

Solution

For a reaction,
aA+bB⇋cC+dDaA + bB \leftrightharpoons cC +dD
Kc=[C]c[D]d[A]a[B]bK_{c}=\frac{\left[C\right]^{c} \left[D\right]^{d}}{\left[A\right]^{a} \left[B\right]^{b}}