For the Compounds :
(A) \(\mathrm{H}_3 \mathrm{C}-\mathrm{CH}_2-\mathrm{O}-\mathrm{CH}_2-\mathrm{CH}_2-\mathrm{CH}_3\)
(B) \(\mathrm{H}_3 \mathrm{C}-\mathrm{CH}_2^2-\mathrm{CH}_2-\mathrm{CH}_2-\mathrm{CH}_3\)
(C) (D) The increasing order of boiling point is :
Choose the correct answer from the options given below :
To determine the increasing order of boiling points for the given compounds, we need to consider the factors affecting boiling points such as hydrogen bonding, polarity, and molecular weight.
Let's analyze each compound:
1. **Compound (A):** $\mathrm{H}_3 \mathrm{C}-\mathrm{CH}_2-\mathrm{O}-\mathrm{CH}_2-\mathrm{CH}_2-\mathrm{CH}_3$ (an ether)
- Ethers generally have lower boiling points than alcohols due to the absence of hydrogen bonding.
- The presence of the oxygen atom provides some polarity, but it's relatively low.
2. **Compound (B):** $\mathrm{H}_3 \mathrm{C}-\mathrm{CH}_2-\mathrm{CH}_2-\mathrm{CH}_2-\mathrm{CH}_3$ (a straight-chain alkane)
- Alkanes are non-polar and have the lowest boiling points among similar-sized molecules.
- Boiling point increases with molecular weight, but this is a simple alkane, so it is expected to have a low boiling point.
3. **Compound (C):** Cyclohexane (a cyclic alkane)
- Cycloalkanes have slightly higher boiling points than their straight-chain counterparts due to the ring structure, which increases van der Waals forces.
4. **Compound (D):** 1-Butanol (an alcohol)
- Alcohols have higher boiling points due to hydrogen bonding.
- The presence of the hydroxyl group allows for strong intermolecular hydrogen bonds.
**Order of Boiling Points:**
- **Lowest:** Compound (B) is a non-polar alkane, hence the lowest boiling point.
- **Next:** Compound (A) is an ether, which has some polarity but no hydrogen bonding.
- **Higher:** Compound (C) is a cycloalkane, which has higher boiling points than straight-chain alkanes due to stronger van der Waals forces.
- **Highest:** Compound (D) is an alcohol with hydrogen bonding, leading to the highest boiling point.
Thus, the increasing order of boiling points is: $ \text{(A)} < \text{(B)} < \text{(C)} < \text{(D)} $
Therefore, the correct answer is: $ \boxed{\text{C}} $
