Which of the following substances produces acetic acid upon fermentation?

$R-OH + HX \to R-X + H_2O$. In the above reaction,the reactivity of different alcohols is:

The reaction of $4-(\text{aminomethyl})\text{cyclohexylmethanol}$ with acetic anhydride $(Ac_2O)$ proceeds in two steps to form $P$ and $Q$. Identify $P$ and $Q$ respectively.

Which of the following reactions is incorrect?

The dehydration of alcohols is an example of ...... .

$HO-CH_2CH_2CH_2CH_2-Br \xrightarrow{KOH} \text{Product}$. The product is: