Indentify the unsaturated compounds from the following.
(i) Propane
(ii) Propene
(iii) Propyne
(iv) Chloropropane

Options

A. (i) and (ii)
B. (ii) and (iv)
C. (iii) and (iv)
D. (ii) and (iii)

Explanation

To identify the unsaturated compounds from the given list, we will analyze each compound based on the presence of double or triple bonds between carbon atoms.

### Step-by-Step Solution:

1. **Understanding Unsaturated Compounds**:
- Unsaturated compounds are those that contain at least one double bond (C=C) or triple bond (C≡C) between carbon atoms. Saturated compounds, on the other hand, only have single bonds (C-C).

2. **Analyzing Each Compound**:
- **(i) Propane (C₃H₈)**:
- Structure: CH₃-CH₂-CH₃
- All bonds between carbon atoms are single bonds.
- Conclusion: Propane is a saturated compound.

- **(ii) Propene (C₃H₆)**:
- Structure: CH₃-CH=CH₂
- Contains a double bond (C=C) between two carbon atoms.
- Conclusion: Propene is an unsaturated compound.

- **(iii) Propyne (C₃H₄)**:
- Structure: CH₃-C≡CH
- Contains a triple bond (C≡C) between two carbon atoms.
- Conclusion: Propyne is an unsaturated compound.

- **(iv) Chloropropane (C₃H₇Cl)**:
- Structure: CH₃-CH₂-CH₂Cl
- One hydrogen atom is replaced by a chlorine atom, but all carbon-carbon bonds are single bonds.
- Conclusion: Chloropropane is a saturated compound.

3. **Final Identification**:
- From the analysis, the unsaturated compounds identified are:
- Propene (ii)
- Propyne (iii)

### Answer:
The unsaturated compounds from the given options are **Propene (ii) and Propyne (iii)**.