When $2-$Methylbut$-2-$ene is treated with hydrogen chloride,the major product obtained is

The correct statement$(s)$ for the following addition reactions is(are):
$(i)$ $trans-but-2-ene \xrightarrow{Br_2/CHCl_3} M \text{ and } N$
(ii) $cis-but-2-ene \xrightarrow{Br_2/CHCl_3} O \text{ and } P$
[$A$] ($M$ and $O$) and ($N$ and $P$) are two pairs of diastereomers
[$B$] Bromination proceeds through trans-addition in both the reactions
[$C$] $O$ and $P$ are identical molecules
[$D$] ($M$ and $O$) and ($N$ and $P$) are two pairs of enantiomers

What is the major product formed by the reaction of $2$-methylpropene with $HBr$?

Which of the following will not give the same product on hydroboration-oxidation and acid-catalysed hydration?

Indicate the organic structure for the product expected when $2-$methylpropene is heated with acetyl chloride in the presence of anhydrous zinc chloride.

$A$ 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: