In the given reaction
$CH_3CH_2CH=CHCH_3$ $\xrightarrow{X}$ $CH_3CH_2COOH + CH_3COOH$
The $X$ is

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

Which reaction is not possible?

Identify the correct statements with respect to $cis/trans$-but$-2$-ene from the following:
$I$. $cis$-but$-2$-ene is more polar than $trans$-but$-2$-ene
$II$. Melting point of $cis$-but$-2$-ene is greater than that of $trans$-but$-2$-ene
$III$. Boiling point of $cis$-but$-2$-ene is greater than that of $trans$-but$-2$-ene
Correct answer is

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

Two isomeric alkenes $A$ and $B$ have the molecular formula $C_5H_9Cl$. Upon hydrogenation,$A$ gives an achiral compound,while $B$ gives a chiral compound. Identify $A$ and $B$ respectively.