why does white Zn0(s) becomes yellow upon heating ?

Explanation

**Step-by-Step Solution:**

1. **Understanding Zinc Oxide (ZnO):**
- Zinc oxide is a compound that appears white at room temperature. It has a specific crystal structure and is often used in various applications, including as a pigment.

2. **Heating Zinc Oxide:**
- When zinc oxide is heated, it undergoes a change in its physical and chemical properties. The heat causes the zinc oxide to lose some of its oxygen content.

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