$C_2H_5OH$ can be differentiated from $CH_3OH$ by:

How many primary alcohol isomers are there for $C_5H_{11}OH$?

$1-$Propanol can be distinguished from $2-$propanol by which test?

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 the product $B$ in the following sequence of reactions:
$CH_3-CH_2-CH_2-OH$ $\xrightarrow[623 \ K]{Al_2O_3} A$ $\xrightarrow[(ii) H_2O, \Delta]{(i) conc. H_2SO_4} B$

Reaction of Grignard reagent,$C_{2}H_{5}MgBr$ with $C_{8}H_{8}O$ followed by hydrolysis gives compound $A$ which reacts instantly with Lucas reagent to give compound $B$,$C_{10}H_{13}Cl$. The compound $B$ is