Short Answer Type

Arrange the following in decreasing order of their acidic strength. Give explanation for the arrangement.

${\mathrm{C}}_6{\mathrm{H}}_5\mathrm{COOH}, {\mathrm{FCH}}_2\mathrm{COOH}, {\mathrm{NO}}_2{\mathrm{CH}}_2\mathrm{COOH}$

Alkenes and carbonyl compounds , both contain a$\mathrm{\pi }$ bond but alkenes show electrophilic addition reactions whereas carbonyl compounds show nucleophilic addition reactions. Explain.

Carboxylic acids contain carbonyl group but do not show the nucleophilic addition reaction like aldehydes or ketones. Why?

Identify the compounds$\mathrm{A}, \mathrm{B}$and $\mathrm{C}$ in the following reaction

Why are carboxylic acids more acidic than alcohols or phenols although all of them have hydrogen atom attached to an oxygen atom$(—\mathrm{O}—\mathrm{H})$?

Complete the following reaction sequence.

Ethylbenzene is generally prepared by acetylation of benzene followed by reduction and not by direct alkylation. Think of a possible reason.

Can Gattermann-Koch reaction be considered similar to Friedel Craft’s acylation? Discuss.