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JEE Main 3 August 2021, Shift 2, Chemistry Q47

Question 47 of 90 in this shift, Chemistry question 17 of 30, Section A.

\xrightarrow[\text{2) Heat}]{\text{1) }\mathrm{NaNO_{2(aq.)}},\ \mathrm{HCl}}

\xrightarrow[\text{conc. }\mathrm{H_2SO_4}]{\mathrm{NO_2^+}}

2,4,6-trinitrophenol (picric acid) In the above reaction sequence the compounds A and B respectively are

The figure, in words

Reaction scheme: A --(1) NaNO2(aq.), HCl; 2) Heat)--> B --(NO2+, conc. H2SO4)--> product drawn as benzene ring with OH at top and NO2 groups at 2,4,6 positions (2,4,6-trinitrophenol). Options show structures of A and B.

(1)[figure: phenol, aniline] (A = phenol, B = aniline)
(2) $\mathrm{CH_3CH_2CONH_2}$ , [figure: phenol]
(3)[figure: aniline, phenol] (A = aniline, B = phenol)Official answer
(4)[figure: bromobenzene, benzoic acid]

Official answer

Option 3

NTA final key.

Chapter: Amines
Topic: Diazonium Salts
Idea tested: Replacement by H or OH

JEE Main 3 August 2021, Shift 2, Chemistry Q47

Same idea in other shifts