In which of the following compounds,$-OH$ is the functional group?

Match the reactions given in Column $(A)$ with the names given in Column $(B).$

Column $(A)$	Column $(B)$
$(a)$ $CH_{3}OH + CH_{3}COOH \xrightarrow{H^{+}} CH_{3}COOCH_{3} + H_{2}O$	$(i)$ Addition reaction
$(b)$ $CH_{2}=CH_{2} + H_{2} \xrightarrow{Ni} CH_{3}-CH_{3}$	$(ii)$ Substitution reaction
$(c)$ $CH_{4} + Cl_{2} \xrightarrow{\text{Sunlight}} CH_{3}Cl + HCl$	$(iii)$ Neutralisation reaction
$(d)$ $CH_{3}COOH + NaOH \longrightarrow CH_{3}COONa + H_{2}O$	$(iv)$ Esterification reaction

Intake of small quantity of methanol can be lethal. Comment.

The structural formula of an ester is shown in the image. Write the structural formula of the acid and the alcohol from which it might be prepared. Name the process of formation of ester.

$(a)$ How is vinegar made?
$(b)$ What is glacial acetic acid? What is its melting point?
$(c)$ Why are carboxylic acids called weak acids?
$(d)$ Write the name and the formula of the two compounds formed when the ester $CH_{3}COOC_{2}H_{5}$ undergoes saponification.

What is the molecular formula of sodium ethanoate?