If the half-life period of a first order reaction in A is 2 minutes, how long will it take [A] to reach `25%` of its initial concentration ?

Explanation

To solve the problem, we need to determine the time it takes for the concentration of substance A to reach 25% of its initial concentration in a first-order reaction, given that the half-life (t₁/₂) is 2 minutes.

### Step-by-step Solution:

1. **Understand the Given Information:**
- The half-life (t₁/₂) of the reaction is 2 minutes.
- We need to find the time required for the concentration of A to reach 25% of its initial concentration.

...