Aldehyde ketones & carboxylic Acid MCQs for NEET — Chemistry Questions with Answers

(a) Resonance in carboxylate ions give rise to identical bond lengths.

(c) 2HgCl2 + HCOOH  ----->  Hg2Cl2  + 2HCl +CO2

(c) ${\mathrm{CH}}_2={\mathrm{CH}}_2 + {\mathrm{PdCl}}_2 + {\mathrm{H}}_2\mathrm{O} \stackrel{{\mathrm{CuCl}}_2}{\to }{\mathrm{CH}}_3\mathrm{CHO} + \mathrm{Pd} + 2\mathrm{HCl}$;

This is Wacker method.

(b) ${\mathrm{CH}}_3\mathrm{COOH} + {\mathrm{N}}_3\mathrm{H} \to {\mathrm{CH}}_3{\mathrm{NH}}_2 + {\mathrm{N}}_2 + {\mathrm{CO}}_2$

(C) ${\mathrm{CH}}_3\mathrm{COOH} \stackrel{X_2,\mathrm{P}}{\to }{\mathrm{CH}}_{2}X-\mathrm{COOH}$

(d) ${\mathrm{NH}}_2{\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{SO}}_3\mathrm{H} \rightleftharpoons \stackrel{+}{{\mathrm{NH}}_3}{\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{SO}}_3^{-}$

p-amino benzene sulphonic acid

(c) Hydrated oxalic acid is ${\mathrm{H}}_2{\mathrm{C}}_2{\mathrm{O}}_4·2{\mathrm{H}}_2\mathrm{O}.$

The given reaction is the Schmidt reaction, where a carboxylic acid is converted into a primary amine using hydrazoic acid (N3H) and concentrated sulfuric acid as a catalyst. This reaction involves the replacement of the -COOH group by -NH2.

(a) Tamarind contains dextro-rotatory pot. Salt of tartaric acid.

Tamarind is a leguminous tree in the family Fabaceae indigenous to tropical Africa. The genus Tamarindus is a monotypic taxon. The tamarind tree produces pod-like fruit that contains an edible pulp.

(c) $R\mathrm{CH}={\mathrm{CHCOOC}}_2{\mathrm{H}}_5\stackrel{\left[\mathrm{H}\right]}{\to }R{\mathrm{CH}}_2{\mathrm{CH}}_2{\mathrm{COOC}}_2{\mathrm{H}}_5$