Salt A commonly used in bakery products on heating gets converted into another salt B which itself is used for removal of hardness of water and a gas C is evolved. The gas C when passed through lime water, turns it milky. Identify A, B and C.

Explanation

To solve the problem, we need to identify three substances: Salt A, Salt B, and Gas C based on the given clues.

### Step-by-Step Solution:

1. **Identify Salt A**:
- The question states that Salt A is commonly used in bakery products. One of the most common salts used in baking is sodium bicarbonate, which is also known as baking soda.
- **Salt A = Sodium Bicarbonate (NaHCO₃)**.

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