The product formed when glycerol reacts with $PCl_5$ is -

Select the correct statement regarding acid-catalysed dehydration of $tert$-butyl alcohol.

$4$-chloro-butan-$1$-ol $+ NaOH \to (B)$. The product $(B)$ of the above reaction is:

Compound $A$ reacts with $PCl_5$ to give $B$,which on treatment with $KCN$ followed by hydrolysis gives propionic acid. What are $A$ and $B$ respectively?

In the following sequence of reactions,the product $C$ is: $CH_3-CH_2-CH_2-Br$ $\xrightarrow{KOH(alc)} (A)$ $\xrightarrow{HBr} (B)$ $\xrightarrow{KOH(aq.)} (C)$

The major product obtained by the dehydration of the given alcohol is: