The degree of hydrolysis of a salt of weak acid and weak base in its `0.1M` solultion is found to be `50%`. If the molarity of the solution is `0.2M`, the percentage hydrolysis of the salt should be:

Options

A. `100%`
B. `50%`
C. `25%`
D. None of these

Explanation

To solve the problem, we need to understand the concept of hydrolysis of salts formed from weak acids and weak bases. The degree of hydrolysis is defined as the fraction of the salt that undergoes hydrolysis in solution.

### Step-by-step Solution:

1. **Understanding Degree of Hydrolysis**:
- The degree of hydrolysis (α) is defined as the fraction of the salt that has hydrolyzed. In this case, we are given that the degree of hydrolysis in a 0.1 M solution is 50%. This means that 50% of the salt has hydrolyzed.

2. **Hydrolysis Constant**:
...