In a first-order reaction ` A to p` if it takes 20 minutes to bring about decomposition of 30% of the initial substance, calculate the time to decompose (i) 60% of it, and (ii) all of it.

Explanation

To solve the problem, we will follow these steps:

### Step 1: Understand the first-order reaction
In a first-order reaction, the rate of the reaction is directly proportional to the concentration of the reactant. The formula for the rate constant \( k \) in a first-order reaction is given by:

\[ k = \frac{1}{t} \ln \left( \frac{[A_0]}{[A_t]} \right) \]
...