Question

When Hydrogen is added to Ethylene (Ethene) in the presence of nickel $2000-{3000}^{\circ }\mathrm{C}$, which product is formed?

Answer 1

1. Ethene does not show any reaction with Hydrogen under normal condition and temperature.
2. To react Ethene with Hydrogen, catalyst is needed and the reaction takes place under certain temperature range.
3. When Ethene reacts with Hydrogen in the presence of catalyst, the reaction is called as hydrogenation reaction or addition reaction.
4. The reaction occurs in the presence of Nickel catalyst.
5. The temperature of the reaction is about ${150}^{\circ }\mathrm{C}$.
6. The chemical reaction occurs as follows:
   $\underset{\left(\mathrm{Ethene}\right)}{{\mathrm{C}}_2{\mathrm{H}}_4\left(\mathrm{g}\right)}+\underset{\left(\mathrm{Hydrogen}\right)}{{\mathrm{H}}_2\left(\mathrm{g}\right)}\underset{\mathrm{Ni}}{\overset{{150}^{\circ }\mathrm{C}}{\to }}\underset{\left(\mathrm{Ethane}\right)}{{\mathrm{C}}_2{\mathrm{H}}_6\left(\mathrm{g}\right)}$
7. Ethene on reacting with Hydrogen in availability of Nickel catalyst gives Ethane.
8. Hence, Ethane is formed when Ethene reacts with Hydrogen in presence of Nickel.