Out of the following, select the compounds containing ionic, covalent and coordinate bonds.
`CaCl_(2),C_(2)H_(6),MgO,HCl,overset(o+)(NH_(4)),O_(3)`

Explanation

To determine which compounds contain ionic, covalent, and coordinate bonds from the given list (`CaCl2`, `C2H6`, `MgO`, `HCl`, `NH4^+`, `O3`), we will analyze each compound step by step.

### Step 1: Identify Ionic Compounds
1. **Calcium Chloride (CaCl2)**:
- Calcium (Ca) is a metal and Chlorine (Cl) is a non-metal.
- Ca loses two electrons to form Ca²⁺ ions, and each Cl gains one electron to form Cl⁻ ions.
- The electrostatic attraction between Ca²⁺ and 2Cl⁻ ions results in an ionic bond.
- **Conclusion**: CaCl2 contains ionic bonds.
...