Mercuric oxide (HgO) is a red powder. When heated in a dry test tube, it gives out liquid mercury and colourless oxygen gas as : Mercuric oxide `to` Mercury + Oxygen What conclusion will you draw regarding these three substances : mercuric oxide, mercury and oxygen?

Explanation

To analyze the reaction of mercuric oxide (HgO) when heated and draw conclusions about the three substances involved, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Reaction:**
- When mercuric oxide (HgO) is heated, it decomposes into two products: liquid mercury (Hg) and oxygen gas (O₂).
- The reaction can be represented as:
\[
...