Question

$K_{c}$ for $A+B \rightleftharpoons C+D$ is 10 at $25^{\circ} C$. If a container contains 1,2,3 and 4 mol per litre of $A, B, C$ and $D$ respectively at $25^{\circ} C$, then

• A. forward reaction should be favoured
• B. backward reaction should be favoured
• C. the reaction should be at equilibrium
• D. none of these.

Answer 1

Answer: (A)

For the reaction, $A+B \rightleftharpoons C+D$

$Q=\frac{[C][D]}{[A][B]}=\frac{3 \times 4}{1 \times 2}=6$

But $K_{c}-10 ;$ as $Q<\, K_{c}$ thus forward rcaction should occur.