What is the number of hydroxyl groups present in propylene glycol?

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.

The products obtained in the following reaction are:

An organic compound $X$ on treatment with acidified $K_2Cr_2O_7$ gives a compound $Y$ which reacts with $I_2$ and sodium carbonate to form tri-iodomethane. The compound $X$ is

Which of the following is a secondary benzylic alcohol?

The compound which gives turbidity immediately with Lucas reagent at room temperature is