Question

Which of the following is true for a system whose equilibrium constant is less than $1$?

• A. It will take a short time to reach equilibrium.
• B. It will take a long time to reach equilibrium.
• C. The equilibrium lies to the left.
• D. The equilibrium lies to the right.

Answer 1

Answer: (C)

The equilibrium lies to the left.

If equilibrium constant of reaction is less than $1$.

Then, $\because K_{eq}=\frac{K_f}{K_b};K_f$ and $K_b$ are same as defined above.

Now, $K_{eq}<1\Rightarrow K_f<K_b$

So, Rate of forward reaction is less than rate of backward reaction. So, less reactants will react to form products and eqn will lie to the left.