Write chemical reactions Involved In preparation of `HClO_3` & `HClO_4` by displacement from their salts.

Explanation

To prepare HClO3 (chloric acid) and HClO4 (perchloric acid) by displacement from their salts, we can follow these steps:

### Step 1: Preparation of HClO3
1. **Identify the salt**: Barium chlorate (Ba(ClO3)2) is used.
2. **React with sulfuric acid**: When barium chlorate reacts with sulfuric acid (H2SO4), it produces barium sulfate (BaSO4) and chloric acid (HClO3).

**Chemical Reaction**:
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