Select the incorrect statement from the option given below.

Options

A. The boiling point of alcohols and phenols are higher in comparison to hydrocarbons, ethers, haloalkanes and haloarenes of comparable molecular masses
B. Ethanol and propane have comparable boiling points but differ only in the molecular masses
C. The -OH group in alcohols and phenols is involved in the intermolecular hydrogen bonding
D. None of the above

Answer

To solve the question of selecting the incorrect statement from the options given, we will analyze each statement step by step.

### Step 1: Analyze the First Statement
**Statement:** The boiling point of alcohols and phenols are higher in comparison to hydrocarbons, ethers, haloalkenes, and haloarenes of comparable molecular mass.

**Analysis:** This statement is correct. Alcohols and phenols have higher boiling points than hydrocarbons, ethers, haloalkenes, and haloarenes of similar molecular mass due to the presence of hydrogen bonding in alcohols and phenols, which is not present in the other compounds mentioned.

### Step 2: Analyze the Second Statement
**Statement:** Ethanol and propane have comparable boiling mass, boiling point, but differ only in molecular masses.

**Analysis:** This statement is incorrect. Ethanol (C2H5OH) has a significantly higher boiling point than propane (C3H8) due to the presence of hydrogen bonding in ethanol, while propane only exhibits weak van der Waals forces. Therefore, they do not have comparable boiling points.

### Step 3: Analyze the Third Statement
**Statement:** The OH group in alcohols and phenols is involved in the intermolecular hydrogen bonding.

**Analysis:** This statement is correct. The hydroxyl (OH) group in alcohols and phenols can form hydrogen bonds with other molecules, leading to higher boiling points due to the strong intermolecular forces.

### Step 4: Conclusion
After analyzing all the statements, we find that the incorrect statement is the second one, which claims that ethanol and propane have comparable boiling points.

### Final Answer
The incorrect statement is **Option 2**: Ethanol and propane have comparable boiling mass, boiling point, but differ only in molecular masses.

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