Chemistry MCQs for NEET — Practice Questions with Answers

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

During the electrolytic reduction of oxalic acid (COOH-COOH) with a lead cathode, the oxalic acid is reduced to glycollic acid (COOH-CH2OH) and glyoxalic acid (COOH-CHO) as the two main products.

Acetoacetic ester (CH3COCH2COOCH3) behaves as both a keto compound, due to the presence of the keto group (>C=O), and as an unsaturated hydroxy compound, due to the presence of an enol form stabilized by intramolecular hydrogen bonding.

(b) Stinges of bees and wasps contain formic acid.

(b) Tartaric acid reduces Tollens reagent.

(b) LiAlH₄ reduces  -COOH to -CH₂OH but does not influence $\mathrm{C}=\mathrm{C}$