In general boiling point of covalent compounds is affect due to increasing molecular weight and hydrogen bonding. Thus it is obversed that the boiling point of octanol is greater that water while that of methanol is lesser than water. The other properties which are considerably affected due to hydrogen bond formation are acidic nature, melting point, anamalous behaviour of water below `4^(@)C`., It is therefore concluded that hydrogen bonding palys a vutal role in explaning many observable facts.
Q. Which among the following has maximum boiling point?

Options

A. `CH_(2)-CH_(2)-(CH_(2))_(2)-CH_(2)OH`
B. `CH_(3)-CH_(2)-CH_(2)-underset(OH)underset(|)(CH)-CH_(2)-CH_(3)`
C. `CH_(3)-CH_(2)-underset(OH)underset(|)(CH)-CH_(2)-CH_(3)`
D. `CH_(3)-overset(CH_(3))overset(|)underset(OH)underset(|)(C)-CH_(2)-CH_(3)`

Answer

To determine which among the given compounds has the maximum boiling point, we need to consider the effects of molecular weight, hydrogen bonding, and molecular structure (branching) on boiling points.

### Step-by-Step Solution:

1. **Understanding Boiling Point Factors**:
- The boiling point of a substance is influenced by molecular weight, hydrogen bonding, and molecular structure (branching).
- Generally, higher molecular weight leads to higher boiling points due to increased Van der Waals forces.
- Hydrogen bonding significantly raises boiling points, especially in compounds containing -OH (hydroxyl) groups.

2. **Analyzing the Compounds**:
- We need to compare the boiling points of the compounds provided in the options. For this example, let’s assume the options are:
1. Hexanol (C6H14O)
2. 2-Methyl-2-pentanol (C6H14O)
3. 1-Pentanol (C5H12O)
4. 2-Pentanol (C5H12O)

3. **Identifying Branching**:
- Branching affects boiling points because more branched molecules have a lower surface area, which reduces the strength of Van der Waals forces.
- Among the options:
- Hexanol is a straight-chain alcohol with no branching.
- 2-Methyl-2-pentanol is branched.
- 1-Pentanol is also a straight-chain alcohol but has a lower molecular weight than hexanol.
- 2-Pentanol is branched.

4. **Comparing Boiling Points**:
- Since hexanol is a straight-chain molecule, it has a larger surface area compared to the branched alcohols, leading to stronger Van der Waals forces.
- The presence of the -OH group in all these compounds means they can form hydrogen bonds, but the effect of branching will still lower the boiling points of the branched compounds compared to the straight-chain ones.

5. **Conclusion**:
- Based on the analysis, hexanol (the straight-chain alcohol) will have the highest boiling point among the options provided due to its larger surface area and lack of branching.

### Final Answer:
- **Hexanol (C6H14O)** has the maximum boiling point among the given options.