Consider the reaction : `A rarr B + C`. Initial concentration of A is 1 M. 20 minutes time is required for completion of 20% reaction. If `(d[B])/(dt) =k[A],` then calculate half life `(t_(1//2))` of reaction.

Explanation

To solve the problem step by step, we will follow the procedure outlined in the video transcript while adding clarity and detail.

### Step 1: Understanding the Reaction
The reaction is given as:
\[ A \rightarrow B + C \]
The initial concentration of A is 1 M. We are told that 20% of the reaction is completed in 20 minutes.

### Step 2: Determine the Change in Concentration
...