Question

Identify the type of reactions alkenes undergo.

Answer 1

Addition reaction

• Addition Of Hydrogen $\left({\mathrm{H}}_2\right)$ to Ethene (Alkene) in presence of catalyst called Nickel $\left(\mathrm{Ni}\right)$ to form Ethane (Alkane).
• Double bond is present between atoms of Carbon $\left(\mathrm{C}\right)$ in Ehtene (Alkene) which is replaced by Hydrogen to form Ethane (Alkane) (Single bond between Carbon atoms).

Formula

Ethane - ${\mathrm{C}}_2{\mathrm{H}}_4$ $(\mathrm{CH}\equiv \mathrm{CH})$

Ethane - ${\mathrm{C}}_2{\mathrm{H}}_6$ $({\mathrm{CH}}_3-{\mathrm{CH}}_3)$

Chemical reaction

$\underset{\underset{\left(\mathrm{Alkene}\right)}{\mathrm{Ethene}}}{{\mathrm{CH}}_2={\mathrm{CH}}_2}\stackrel{\mathrm{Ni}/{\mathrm{H}}_2}{\to }\underset{\underset{\left(\mathrm{Alkane}\right)}{\mathrm{Ethane}}}{{\mathrm{CH}}_3-{\mathrm{CH}}_3}$