JEE Main 2021 · ChemistryMultiple choiceDiagram basedMediumConceptual

JEE Main 24 February 2021, Shift 2, Chemistry Q45

Question 45 of 90 in this shift, Chemistry question 15 of 30, Section A.

The correct order of the following compounds showing increasing tendency towards nucleophilic substitution reaction is : (i) [figure: benzene ring with Cl] (ii) [figure: benzene ring with Cl and, opposite it,

\mathrm{NO_2}

] (iii) [figure: benzene ring with Cl and two

\mathrm{NO_2}

groups] (iv) [figure: benzene ring with Cl and three

\mathrm{NO_2}

groups]

The figure, in words

Four drawn benzene rings (inner circle). (i) one Cl only. (ii) Cl at the top and NO2 at the bottom (para). (iii) Cl at the top, NO2 at the upper right (adjacent to Cl) and NO2 at the bottom. (iv) Cl at the top, O2N at the upper left, NO2 at the upper right and NO2 at the bottom.

(1)(iv) $<$ (iii) $<$ (ii) $<$ (i)
(2)(iv) $<$ (i) $<$ (iii) $<$ (ii)
(3)(i) $<$ (ii) $<$ (iii) $<$ (iv)Official answer
(4)(iv) $<$ (i) $<$ (ii) $<$ (iii)

Official answer

Option 3

NTA final key.

Chapter: Haloalkanes and Haloarenes
Topic: Aromatic Hydrocarbons
Idea tested: SNAr and Meisenheimer Complex

JEE Main 24 February 2021, Shift 2, Chemistry Q45

Same idea in other shifts