Fresh milk has a pH of 6. When it changes into curd (yogurt) , will its pH value increase or decreases ? Why ?

Explanation

To determine whether the pH of fresh milk increases or decreases when it changes into curd (yogurt), we can follow these steps:

### Step-by-Step Solution:

1. **Understand the pH Scale**:
The pH scale ranges from 0 to 14. A pH of 7 is considered neutral, below 7 is acidic, and above 7 is basic. Fresh milk has a pH of 6, which indicates it is slightly acidic.

**Hint**: Remember that lower pH values indicate higher acidity.
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