The compound which contains both ionic and covalent bonds is

Options

A. `CH_(4)`
B. `H_(2)`
C. `KCN`
D. `KCl `

Answer

To determine which compound contains both ionic and covalent bonds, we will analyze the given options one by one.

### Step-by-Step Solution:

1. **Identify the Compounds**: The question provides four options. We need to analyze each one to see if it contains both ionic and covalent bonds.

2. **Analyze Option 1: CH₄ (Methane)**:
- Methane consists of one carbon atom bonded to four hydrogen atoms.
- The bonds between carbon and hydrogen are formed by sharing electrons, which means they are covalent bonds.
- **Conclusion**: CH₄ contains only covalent bonds.

3. **Analyze Option 2: H₂ (Hydrogen)**:
- H₂ consists of two hydrogen atoms.
- The bond between the two hydrogen atoms is formed by sharing their single electrons, resulting in a covalent bond.
- **Conclusion**: H₂ contains only covalent bonds.

4. **Analyze Option 3: KCN (Potassium Cyanide)**:
- KCN consists of potassium (K), carbon (C), and nitrogen (N).
- The bond between carbon and nitrogen involves sharing electrons, which indicates a covalent bond.
- Potassium donates one electron to form K⁺, while CN⁻ (cyanide) is formed by the covalent bonding between C and N.
- **Conclusion**: KCN contains both ionic (between K and CN) and covalent bonds (between C and N).

5. **Analyze Option 4: KCl (Potassium Chloride)**:
- KCl consists of potassium (K) and chlorine (Cl).
- Potassium loses one electron to chlorine, resulting in K⁺ and Cl⁻ ions, which are held together by ionic bonds.
- **Conclusion**: KCl contains only ionic bonds.

### Final Answer:
The compound that contains both ionic and covalent bonds is **KCN (Potassium Cyanide)**.

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