Question

$K_c$ for $A+B\rightleftharpoons C+D$ is $10$ at ${25}^{o}C$. If a container contains $1,2,3$ and $4$ mole per litre of $A,B,C$ and $D$ respectively at ${25}^{o}C$, the reaction shall:

• A. Proceed from left to right
• B. Proceed from right to left
• C. Be at equilibrium
• D. None of these

Answer 1

Answer: (A)

Proceed from left to right

$K_c$ for $A+B\rightleftharpoons C+D$ is $10$ at ${25}^{o}C$. If a container contains $1,2,3$ and $4$ mole per litre of $A,B,C$ and $D$ respectively at ${25}^{o}C$, the reaction shall Proceed from left to right

$Q_c=\frac{\left[C\right]\left[D\right]}{\left[A\right]\left[B\right]}$

$Q_c=\frac{3\times 4}{1\times 2}$

$Q_c=6$

$K_c=10$

$Q_C<K_c$

The product concentration is less than equilibrium concentration. The reactant concentration is more than equilibrium concentration.

Thus, the correct option is $A$