Question

Give reaction:

Addition of ethene with hydrogen

Answer 1

1. Ethene$\left({\mathrm{C}}_2{\mathrm{H}}_4\right)$ has a suffix “-ene” indicating the presence of a double bond.
2. Ethene is the first member of the alkene group and is relatively more reactive than Ethane$\left({\mathrm{C}}_2{\mathrm{H}}_6\right)$.
3. Ethene on reaction with Hydrogen$\left({\mathrm{H}}_2\right)$ undergoes an addition reaction, adding two hydrogen atoms leading to the formation of Ethane.
4. The addition of Hydrogen$\left({\mathrm{H}}_2\right)$ to break the double bond in Ethene using catalyst at high temperature is called catalytic Hydrogenation.
5. The above reaction can be represented as given below:

$\underset{\left(\mathrm{Ethane}\right)}{{\mathrm{C}}_2{\mathrm{H}}_4\left(\mathrm{g}\right)}+\underset{\left(\mathrm{Hydrogen}\right)}{{\mathrm{H}}_2\left(\mathrm{g}\right)}\stackrel{\mathrm{Ni}/{300}^{\mathrm{o}}\mathrm{C}\mathrm{or}\mathrm{Pt}/\mathrm{room}\mathrm{temp}.}{\to }\underset{\left(\mathrm{Ethane}\right)}{{\mathrm{C}}_2{\mathrm{H}}_6\left(\mathrm{g}\right)}$