Give the major product of the reaction:

The major product $(P)$ formed in the reaction below is: $HC \equiv C-CH_2-CH=CH_2 \xrightarrow[CCl_4, 253 \ K]{Br_2(1 \ mol)} P$

Which of the species shown below is the most stable form of the intermediate in the electrophilic addition of $Cl_2$ in water to cyclohexene to form a halohydrin?

Predict the major alkene product formed upon heating the following ester:

The number of hydrogen atoms which can participate in hyperconjugation in $Y$ is
$CH_3CH_2COCH_3$ $\xrightarrow{LiAlH_4} X$ $\xrightarrow{conc. H_2SO_4, \Delta} Y \text{ (Major)}$

$CH_3-CH=CH_2$ $\xrightarrow{Br_2, hv (\text{low conc.})} \dots$ $\xrightarrow{Mg, \text{Dry ether}} \dots$ $\xrightarrow{CH_3-CO-CH_3, NH_4Cl} \dots$ $\xrightarrow{H^{+}, \Delta} (X)$. The end product $(X)$ of the above reaction is: