Chemistry - GOC Question with Solution | TestHub

The polarity of organic compounds depends on the presence of polar bonds and their ability to form hydrogen bonds.

Diethyl ether (A) has C-O bonds but lacks hydrogen bonding capabilities, making it the least polar among the given compounds.

Acetone (C) contains a highly polar C=O double bond, making it more polar than ethers, but it cannot act as a hydrogen bond donor.

Ethanol (B) contains an -OH group, which allows it to form strong intermolecular hydrogen bonds, making it more polar than ketones.

Acetic acid (D) contains both a carbonyl group (C=O) and a hydroxyl group (-OH). This allows for extensive hydrogen bonding (often forming dimers), making it the most polar of the given compounds.

Therefore, the increasing order of polarity is A $<$ C $<$ B $<$ D.

Answer: $\text{A}<\text{C}<\text{B}<\text{D}$