Give four properties of electrovalent compounds.

Explanation

### Step-by-Step Solution:

1. **Definition of Electrovalent Compounds**:
- Electrovalent compounds, also known as ionic compounds, are formed through the electrostatic attraction between positively charged ions (cations) and negatively charged ions (anions). This occurs due to the transfer of electrons from metals to non-metals.

2. **Property 1: High Melting and Boiling Points**:
- Electrovalent compounds have high melting and boiling points. This is because the ionic bonds that hold the ions together are very strong, requiring a significant amount of energy to break these bonds.

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