132. Define substitution reaction.

1.	132. Define substitution reaction.
Answer» The reaction in which one (or more )hydrogen atoms of a hydrocarbon are replaced bysome other atoms is called a substitution reaction. A good example of a substitution reaction ishalogenation. When chlorine gas (Cl-Cl) is irradiated, some of the molecules are split into two chlorine radicals (Cl.) whose free electrons are stronglynucleophilic. One of them breaks a weak C-Hcovalentbond and grabs the liberated proton to form the electrically neutral H-Cl. The other radical reforms a covalent bond with the CH3.to form CH3Cl (methyl chloride).

Answer»

The reaction in which one (or more )hydrogen atoms of a hydrocarbon are replaced bysome other atoms is called a substitution reaction.

A good example of a substitution reaction ishalogenation. When chlorine gas (Cl-Cl) is irradiated, some of the molecules are split into two chlorine radicals (Cl.) whose free electrons are stronglynucleophilic. One of them breaks a weak C-Hcovalentbond and grabs the liberated proton to form the electrically neutral H-Cl. The other radical reforms a covalent bond with the CH3.to form CH3Cl (methyl chloride).

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