Find out the $X$ of the given reaction :-

What is obtained when propene is treated with $N$-bromosuccinimide?

Identify the reagent$(s)$ $A$ and condition$(s)$ for the reaction shown in the image:

Markownikoff's rule provides guidance for the addition of $HBr$ on:

The number of alkene$(s)$ which can produce $2-butanol$ by the successive treatment of $(i)$ $B_{2}H_{6}$ in tetrahydrofuran solvent and $(ii)$ alkaline $H_{2}O_{2}$ solution is:

What is the major product of the following reaction?
$CH_2=CH-CH=CH_2 + Br_2 \text{ (1 eq)} \xrightarrow{\Delta} ?$