Write the reaction for the preparation of ethane from the following:
$(i)$ Ethene
$(ii)$ Ethyl chloride

(N/A) The preparation of ethane $(CH_3-CH_3)$ from the given compounds is as follows:
$(i)$ From Ethene:
Ethene undergoes catalytic hydrogenation in the presence of $Pt/Pd/Ni$ to form ethane.
$CH_2=CH_2 + H_2 \xrightarrow{Pt/Pd/Ni} CH_3-CH_3$
$(ii)$ From Ethyl chloride:
Ethyl chloride undergoes reduction with $Zn$ and $H^+$ to form ethane.
$CH_3CH_2Cl + H_2 \xrightarrow{Zn, H^+} CH_3-CH_3 + HCl$