In the reaction `A+B hArr C+D`, the value of equilibrium constant is `10`. If the rate constant of forward reaction is `80`, the rate constant of backward reaction is …………

Explanation

To find the rate constant of the backward reaction (Kb) in the equilibrium reaction \( A + B \rightleftharpoons C + D \), we can use the relationship between the equilibrium constant (Kc) and the rate constants of the forward (Kf) and backward (Kb) reactions.

### Step-by-Step Solution:

1. **Understand the Equilibrium Constant**:
The equilibrium constant (Kc) for the reaction can be expressed in terms of the concentrations of the products and reactants at equilibrium:
\[
K_c = \frac{[C][D]}{[A][B]}
...