Identify the alcohol that reacts immediately with Lucas reagent.

Which of the following gives a $2^{\circ}$ alcohol as a major product upon reaction with $CH_{3}MgBr$ followed by $H_{2}O$?

An alcohol $X$ $(C_5H_{12}O)$ on dehydration gives $Y$ (major product). Reaction of $Y$ with $HBr$ gave $Z$ ($C_5H_{11}Br$,major product). $Z$ undergoes nucleophilic substitution in two steps. What are $X$ and $Y$?

The major product of the following reaction is:

Which of the following compounds cannot be synthesized by the reaction of a Grignard reagent?

Which of the following reactions takes place when tertiary butanol is passed over heated copper at $573 \ K$?