$CH_2 = CH_2 \xrightarrow[KOH / H_2O]{KMnO_4} X$. The product $X$ in the above reaction is:

$A$ hydrocarbon of formula $C_6H_{10}$ absorbs only one molecule of $H_2$ upon catalytic hydrogenation. Upon ozonolysis,the hydrocarbon yields $OHC-CH_2-CH_2-CH_2-CH_2-CHO$. The hydrocarbon is:

The total number of alkyl bromides (including stereoisomers) formed in the reaction $(CH_3)_3C-CH=CH_2 + HBr \rightarrow$ will be

What is the product formed when one molecule of $HBr$ reacts with one molecule of $1,3$-butadiene at $40^{\circ}C$?

Write the $IUPAC$ names of the products obtained by the addition reaction of $HBr$ to $hex-1-ene$:
$(i)$ in the absence of peroxide and
$(ii)$ in the presence of peroxide.

An alkene on ozonolysis gave acetaldehyde. The alkene is: