The given reaction is known as :

In the reaction sequence:
$\text{Ethanol}$ $\xrightarrow{PCl_5} X$ $\xrightarrow{\text{alc. } KOH} Y$ $\xrightarrow[H_2O, \Delta]{H_2SO_4, \text{room temp.}} Z$
The product $Z$ is:

Identify $Z$ in the following series:
$CH_2=CH_2$ $\xrightarrow{HBr} X$ $\xrightarrow{Hydrolysis} Y$ $\xrightarrow[I_2 \ \text{excess}]{Na_2CO_3} Z$

The starting material is $butan-2-ol$. The reaction with $H^+/\Delta$ yields $(x)$ possible products,and the subsequent reaction of these products with $Br_2/CCl_4$ yields $(y)$ possible products. Determine the values of $x$ and $y$.

What is formed when glycerol reacts with $HI$?

An organic compound $(A)$ (molecular formula $C_{6}H_{12}O_{2}$) was hydrolysed with dil. $H_{2}SO_{4}$ to give a carboxylic acid $(B)$ and an alcohol $(C).$ $C$ gives white turbidity immediately when treated with anhydrous $ZnCl_{2}$ and conc. $HCl$. The organic compound $(A)$ is