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_(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 options has the maximum boiling point, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Factors Affecting Boiling Point**:
- The boiling point of covalent compounds is influenced by molecular weight and the presence of hydrogen bonding.
- Hydrogen bonding significantly increases the boiling point due to strong intermolecular forces.

2. **Identify the Compounds**:
- We need to analyze the given options, which are all alcohols (as per the video transcript). Let's assume the options are:
- Option A: 1-Butanol (C4H10O)
- Option B: 2-Butanol (C4H10O)
- Option C: 1-Pentanol (C5H12O)
- Option D: 2-Pentanol (C5H12O)

3. **Compare Molecular Weights**:
- Generally, higher molecular weight compounds have higher boiling points due to increased Van der Waals forces.
- Compare the molecular weights:
- 1-Butanol: 74.12 g/mol
- 2-Butanol: 74.12 g/mol
- 1-Pentanol: 88.15 g/mol
- 2-Pentanol: 88.15 g/mol

4. **Assess the Structure**:
- Linear alcohols typically have a higher boiling point than branched alcohols due to a larger surface area that allows for stronger Van der Waals forces.
- 1-Butanol and 1-Pentanol are linear, while 2-Butanol and 2-Pentanol are branched.

5. **Evaluate Hydrogen Bonding**:
- All alcohols can form hydrogen bonds, but the extent of hydrogen bonding can also depend on the structure.
- Linear alcohols can align better for hydrogen bonding compared to branched ones.

6. **Conclusion**:
- Comparing the boiling points based on molecular weight and structure:
- 1-Pentanol (88.15 g/mol) will have a higher boiling point than both 1-Butanol and 2-Butanol due to its higher molecular weight and linear structure.
- Therefore, among the given options, **1-Pentanol has the maximum boiling point**.

### Final Answer:
**1-Pentanol has the maximum boiling point among the given options.**