Among the following , the compound with highest density is

Options

A. `n- C_3H_7Cl`
B. `n - C_3H_7Br`
C. `n - C_3H_7I`
D. `CHCl_3`

Explanation

To determine which compound has the highest density among the given options, we need to analyze the molecular masses of each compound. Density is defined as mass per unit volume, and in this context, we can infer that a higher molecular mass generally leads to a higher density, assuming similar volumes.

### Step-by-Step Solution:

1. **Identify the Compounds**:
- Option A: C3H7Cl (Chloropropane)
- Option B: C3H7Br (Bromopropane)
- Option C: C3H7I (Iodopropane)
- Option D: CHCl3 (Chloroform)

2. **Calculate the Molecular Masses**:
- **Option A (C3H7Cl)**:
- C: 12.01 g/mol × 3 = 36.03 g/mol
- H: 1.008 g/mol × 7 = 7.056 g/mol
- Cl: 35.45 g/mol × 1 = 35.45 g/mol
- Total mass = 36.03 + 7.056 + 35.45 = **78.536 g/mol** (approximately 78.5 g/mol)

- **Option B (C3H7Br)**:
- C: 12.01 g/mol × 3 = 36.03 g/mol
- H: 1.008 g/mol × 7 = 7.056 g/mol
- Br: 79.904 g/mol × 1 = 79.904 g/mol
- Total mass = 36.03 + 7.056 + 79.904 = **123.99 g/mol** (approximately 124 g/mol)

- **Option C (C3H7I)**:
- C: 12.01 g/mol × 3 = 36.03 g/mol
- H: 1.008 g/mol × 7 = 7.056 g/mol
- I: 126.904 g/mol × 1 = 126.904 g/mol
- Total mass = 36.03 + 7.056 + 126.904 = **170.99 g/mol** (approximately 171 g/mol)

- **Option D (CHCl3)**:
- C: 12.01 g/mol × 1 = 12.01 g/mol
- H: 1.008 g/mol × 1 = 1.008 g/mol
- Cl: 35.45 g/mol × 3 = 106.35 g/mol
- Total mass = 12.01 + 1.008 + 106.35 = **119.368 g/mol** (approximately 119 g/mol)

3. **Compare the Molecular Masses**:
- Option A: 78.5 g/mol
- Option B: 124 g/mol
- Option C: 171 g/mol
- Option D: 119 g/mol

4. **Identify the Compound with the Highest Mass**:
- The highest molecular mass is **171 g/mol** for **Option C (C3H7I)**.

5. **Conclusion**:
- Therefore, the compound with the highest density is **C3H7I (Iodopropane)**.