Which of the following compounds has both ions and covalent bonding?

Options

A. NaBr
B. Ba(CN)
C. `PCl_5`
D. `CH_3CH_2OH`

Answer

To determine which of the following compounds has both ionic and covalent bonding, we will analyze each compound step by step.

### Step 1: Identify the nature of bonding in each compound.
1. **NaBr (Sodium Bromide)**:
- Sodium (Na) is an alkali metal, and bromine (Br) is a halogen.
- Sodium tends to lose one electron to form Na⁺, and bromine tends to gain one electron to form Br⁻.
- This results in the formation of an ionic bond between Na⁺ and Br⁻.
- **Conclusion**: NaBr has only ionic bonding.

2. **Ba(CN)₂ (Barium Cyanide)**:
- Barium (Ba) is a metal that forms Ba²⁺ ions.
- The cyanide ion (CN⁻) consists of carbon and nitrogen, which are covalently bonded together.
- Within the cyanide ion, there are covalent bonds (specifically, a triple bond between C and N).
- Therefore, Ba(CN)₂ has both ionic bonding (between Ba²⁺ and CN⁻) and covalent bonding (within the CN⁻ ion).
- **Conclusion**: Ba(CN)₂ has both ionic and covalent bonding.

3. **PCl₅ (Phosphorus Pentachloride)**:
- Phosphorus (P) and chlorine (Cl) are both nonmetals.
- They form covalent bonds with each other, resulting in a molecular compound.
- There are no ions present in PCl₅.
- **Conclusion**: PCl₅ has only covalent bonding.

4. **CH₃CH₂OH (Ethanol)**:
- Ethanol is an organic compound consisting of carbon, hydrogen, and oxygen.
- All the bonds in ethanol are covalent bonds, with no ions present.
- **Conclusion**: CH₃CH₂OH has only covalent bonding.

### Step 2: Summary of Findings
- **NaBr**: Ionic bonding only.
- **Ba(CN)₂**: Both ionic and covalent bonding.
- **PCl₅**: Covalent bonding only.
- **CH₃CH₂OH**: Covalent bonding only.

### Final Answer
The compound that has both ionic and covalent bonding is **Ba(CN)₂**.

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