Lucas test is used for the determination of

The decreasing order of dehydration of the following alcohols is:

Compound $A, C_{8}H_{10}O,$ is found to react with $NaOI$ (produced by reacting $Y$ with $NaOH$) and yields a yellow precipitate with a characteristic smell. $A$ and $Y$ are respectively:

Identify the organic product formed when ethylene glycol is heated with acidic potassium permanganate $(KMnO_4)$.

The compound which gives the most stable carbocation on dehydration is:

The relative rate of acid-catalyzed dehydration of the following alcohols would be: