Distinguish on the basis of heating in dry test tube
Zinc nitrate and copper nitrate

Explanation

To distinguish between zinc nitrate and copper nitrate based on their behavior when heated in a dry test tube, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Compounds**:
- Zinc nitrate is represented as \( \text{Zn(NO}_3\text{)}_2 \cdot 6\text{H}_2\text{O} \).
- Copper nitrate is represented as \( \text{Cu(NO}_3\text{)}_2 \cdot 6\text{H}_2\text{O} \).

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