Give reasons for the following:
Why does a candle flame is yellow in colour?

Explanation

**Step-by-Step Solution:**

1. **Understanding Candle Flame**: A candle flame is produced when the wax (which is primarily made of hydrocarbons) melts and vaporizes, allowing it to burn.

2. **Combustion Process**: When the wax vapor combines with oxygen in the air, it undergoes a chemical reaction known as combustion. This process can be complete or incomplete.

3. **Incomplete Combustion**: In the case of a candle flame, the combustion is often incomplete. This means that there is not enough oxygen available to allow all the wax vapor to burn completely.

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