Question

Explain the following reaction with example.

Addition reaction

Answer 1

The reaction in which the addition of a substance occurs across the carbon-carbon double or triple bond is called an addition reaction. Addition reactions occur in unsaturated hydrocarbons.

e.g. 

\[\begin{array}{cc}
\phantom{................................}\ce{H}\phantom{...}\ce{H}\\
\phantom{................................}|\phantom{....}|\\
\ce{H - C = C - H \underset{\text{Hydrogen}}{+ H - H} ->[Ni/Pt] H - C - C - H}\\
|\phantom{.....}|\phantom{..........................}|\phantom{....}|\\
\ce{\phantom{.}\underset{\text{Ethene}}{H \phantom{...}H}}\phantom{.........................}
\ce{\underset{\text{Ethane}}{H \phantom{...}H}}
\end{array}\]