When $but-3-en-2-ol$ reacts with aqueous $HBr$,the product formed is:

Assertion : Alkylbenzene is not prepared by Friedel-Crafts alkylation of benzene.
Reason : Alkyl halides are less reactive than acyl halides.

Which of the following compounds is a tertiary alkyl halide?

Which of the following products can be obtained from the above reaction?

When $but-3-en-2-ol$ reacts with aqueous $HBr$,which of the following products is obtained?

What happens when
$(i)$ $n$-butyl chloride is treated with alcoholic $KOH$.
$(ii)$ bromobenzene is treated with $Mg$ in the presence of dry ether.
$(iii)$ chlorobenzene is subjected to hydrolysis.
$(iv)$ ethyl chloride is treated with aqueous $KOH$.
$(v)$ methyl bromide is treated with sodium in the presence of dry ether.
$(vi)$ methyl chloride is treated with $KCN$?