Question

For a gaseous reaction 2B $\rightleftharpoons$ A , the equilibrium constant. $K_p$ is ____________ to/ than $K_c$.

• A. lesser
• B. greater
• C. equal
• D. half

Answer 1

The correct option is A lesser

$K_p=K_c(RT{)}^{\Delta n}$

For a reaction, $2B\rightleftharpoons A$

Here, $\Delta n=1-2=-1$

Thus, $K_p$ is less than $K_c$.

Hence, option A is correct.