The increasing order of the boiling points for the following compounds is:

• C₂H₅OH
• C₂H₅Cl
• C₂H₅CH₃
• C₂H₅OCₕ₃

A. (III) < (IV) < (II) < (I)

B. (II) < (III) < (IV) < (I)

C. (III) < (II) < (I) < (IV)

D. (IV) < (III) < (I) < (II)

The boiling points of compounds can be influenced by factors such as molecular weight, polarity, and the presence of functional groups. Let's analyze the given compounds:

Compounds Overview

• C₂H₅OH (Ethanol) - Contains a hydroxyl group, making it polar and capable of hydrogen bonding.
• C₂H₅Cl (Ethyl chloride) - A polar molecule due to the chlorine atom, but lacks hydrogen bonding.
• C₂H₅CH₃ (Ethyl methane) - A non-polar hydrocarbon with lower boiling point due to weak van der Waals forces.
• C₂H₅OCₕ₃ (Ethyl methyl ether) - An ether that is polar but does not form hydrogen bonds like alcohols.

Boiling Points Ranking

Based on the analysis, the order of boiling points from lowest to highest is:

1. C₂H₅CH₃ (Ethyl methane)
2. C₂H₅Cl (Ethyl chloride)
3. C₂H₅OCₕ₃ (Ethyl methyl ether)
4. C₂H₅OH (Ethanol)

Thus, the increasing order of boiling points is:

III, II, IV, I