Alcohols

Ethylene glycol (C H O ) contains two primary alcohol groups, meaning two –OH groups are attached to two different carbon atoms, and each carbon is attached to one other carbon atom (making them primary alcohols). The structure of glycerol contains three hydroxyl groups attached to different carbons, but two of these carbons are secondary alcohols because they are bonded to two other carbons. Isopropyl alcohol (C H OH) only has one primary alcohol group and a secondary alcohol group. Thus, Ethylene glycol is the correct answer because it contains two primary –OH groups.

Ethanol is often made unfit for consumption by the addition of methanol, a toxic substance. The process of adding methanol to ethanol is known as "denaturing," and it renders the ethanol undrinkable. Methanol itself is highly toxic and can cause severe poisoning if ingested.
Thus, the correct answer is .

An allylic alcohol is a compound where the hydroxyl group is attached to a carbon atom that is adjacent to a double bond. In option (B), the structure fits the definition of allylic alcohol because the hydroxyl group is attached to the carbon adjacent to the double bond. Step 1: Understand allylic alcohol.
Allylic alcohols have a hydroxyl group attached to a carbon that is part of the allyl group (adjacent to a C=C bond).
Step 2: Conclusion.
Therefore, the correct answer is option (B).
Final Answer: (B)