What is the product of the mild oxidation of glycerol using $H_2O_2/FeSO_4$?

Identify the reagents used for the following conversion in the correct order.

$2, 4$-hexadiyne $(CH_3-C\equiv C-C\equiv C-CH_3)$ is allowed to react with $Li$ in $NH_3$ $(liq)$. The product obtained is treated with $1$ equivalent of $Cl_2$ in $CCl_4$. Which of the following constitutional isomers are possible products?

In the following reactions:
$1.$ Compound $X$ is
$2.$ The major compound $Y$ is
Give the answer for question $1$ and $2.$

Reactant $(A)$ can be

What are $X$ and $Y$ respectively in the following sets of reactions?
$I. \ CH_3CH_2CH_2OH \xrightarrow{PBr_3} X$
$II. \ CH_3CH=CH_2 \xrightarrow{HBr, (C_6H_5COO)_2} Y \text{ (major)}$