Question

What are the necessary conditions for adding of Alkenes on Hydrogen.

Answer 1

1. When unstaurated hydrocarbons such as Alkene is reacted with Hydrogen, such process is called hydrogenation or addition reaction.
2. The reaction involves catalysts such as Platinum $\mathbf{\left(}\mathbf{Pt}\mathbf{\right)}\mathbf{}$ , Nickel ($\mathbf{Ni}$) and temperature upto ${150}^{\circ }\mathrm{C}$.
3. Addition of hydrogen to alkene gives saturated hydrocarbon Alkane.
4. The chemical reaction which shows the necessary conditions are as follows:
   $\underset{\left(\mathrm{Ethene}\right)}{{\mathrm{C}}_2{\mathrm{H}}_4\left(\mathrm{g}\right)}+\underset{\left(\mathrm{Hydrogen}\right)}{{\mathrm{H}}_2\left(\mathrm{g}\right)}\underset{\mathrm{Ni}}{\overset{{150}^{\circ }\mathrm{C}}{\to }}\underset{\left(\mathrm{Ethane}\right)}{{\mathrm{C}}_2{\mathrm{H}}_6\left(\mathrm{g}\right)}$
5. Therefore, the necessary conditions for adding of Alkenes on Hydrogen is the presence of catalyst and specific temperature.