Write chemical equation to represent each of the following types of reactions of organic substances.
(i) Esterification,
(ii) Saponification
(iii) Substitution.

Explanation

(i) `underset("Ethanoic acid")(CH_(3)COOH)+underset("Ethanol")(C_(2)H_(5)OH)tounderset("Ethyl ethanoate")(CH_(3)COOC_(2)H_(5))+H_(2)O`
(ii) `underset("Ethyl ethanoate")(CH_(3)COOC_(2)H_(5))+NaOHtounderset("Sod. Ethanoate")(CH_(3)COONa)+underset("Ethanol")(C_(2)H_(5)OH)`
(iii) `underset("Methane")(CH_(4)+Cl_(2))tounderset("Chloromethane")(CH_(3)Cl)+HCl`