A reaction is of second order with respect to its reactant. How will its reaction rate be affected if the concentration of the ractant is (i) doubled (ii) reduced to half ?

Explanation

To solve the problem, we need to analyze how the reaction rate changes when the concentration of a second-order reactant is altered. Let's break it down step by step.

### Step-by-Step Solution:

1. **Understand the Rate Law for a Second-Order Reaction:**
For a second-order reaction with respect to reactant A, the rate of reaction (R) can be expressed as:
\[
R = k [A]^2
...