Predict the major product of acid-catalyzed dehydration of butan-$1$-ol.

Reaction of Grignard reagent,$C_{2}H_{5}MgBr$ with $C_{8}H_{8}O$ followed by hydrolysis gives compound $A$ which reacts instantly with Lucas reagent to give compound $B$,$C_{10}H_{13}Cl$. The compound $B$ is

For the given reaction,if the final product is a mixture of $C_4H_8Br_2$ isomers,what is the value of $X$ (the number of alkenes formed in the mixture)?

Which of the following alcohols undergo a dehydration reaction with $Cu$ (copper) metal at $573 \ K$ temperature?

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:

Write the structures of the isomers of alcohols with molecular formula $C_4H_{10}O$. Which of these will exhibit optical activity?