Question

(a) Write the dehydration reaction of ethanol and write the name of dehydrating agent.
(b) Choose correct series for the following.

Compund	Series
(i) Ethane	(a) unsaturated hydrocarbon
(ii) Benzene	(b) long chained saturated hydrocarbon
(iii) Hexane	(c) hydrocarbon having odd atom
(iv) Methyl alcohol	(d) saturated hydrocarbon

Answer 1

(a) Ethanol can be dehydrated to give ethene by heating it with an excess of concentrated sulphuric acid at about ${170}^{\circ }C$.

$C{H}_{3}C{H}_{2}OH\underset{{170}^{o}C}{\overset{H_{2}S{O}_4}{\to }}C{H}_2=C{H}_2+H_{2}O$

b) Correct series:-

Compound	Series
Ethane	saturated hydrocarbon
Benzene	unsaturated hydrocarbon
Hexane	long-chain saturated hydrocarbon
Methyl alcohol	Hydrocarbon having odd atom