What is the product formed when ethyl alcohol reacts with chlorine in the presence of $NaOH$?

Major product of the reaction is

The dehydration of $butan-2-ol$ in the presence of $H^{+}$ yields $[F]$. How many structural isomers of $[F]$ are possible?

What is the nature of alcohols in aqueous medium?

Order of boiling points of the given compounds is:
$(a)$ $\text{pentan-1-ol}$
$(b)$ $\text{butan-1-ol}$
$(c)$ $\text{butan-2-ol}$
$(d)$ $\text{propan-1-ol}$

Consider the following reaction:
$CH_3CH_2OH$ $\xrightarrow{PBr_3} X$ $\xrightarrow{alc. KOH} Y$ $\xrightarrow[(ii) H_2O, \text{heat}]{(i) H_2SO_4, \text{room temperature}} Z$
The product $Z$ is