Q. 25.0( 1 Vote )

Name the important chemical reactions of hydrocarbons. Give one example for each.

Answer :

Important chemical reactions of hydrocarbons are:

i. Substitution reaction:


Reaction in which an atom or a group in a compound is replaced by another atom or group are called substitution reactions.


Example:



Methane Chloromethane


In the above example, one hydrogen atom of methane is replaced by one chlorine atom.


ii. Addition reaction


When an unsaturated hydrocarbon reacts with hydrogen, gives a saturated hydrocarbon. This reaction is called addition reaction.


Example:


CH2 = CH2 + H2 CH3—CH3



(unsaturated) (saturated)


iii. Polymerization


Polymerization is a process in which a large number of simple molecules combine under suitable conditions to form complex molecules. The molecules formed are called polymers.


Example:



In the above reaction, a large number of ethene molecules combine under higher pressure in the presence of catalyst to form polythene.


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