JEE Main 2021 · ChemistryMultiple choiceSingle correctMediumMulti-step

JEE Main 25 July 2021, Shift 2, Chemistry Q50

Question 50 of 90 in this shift, Chemistry question 20 of 30, Section A.

A reaction of benzonitrile with one equivalent

\mathrm{CH_3MgBr}

followed by hydrolysis produces a yellow liquid "P". The compound "P" will give positive ________.

(1)Tollen's test
(2)Ninhydrin's test
(3)Iodoform testOfficial answer
(4)Schiff's test

Official answer

Option 3

NTA final key.

Chapter: Aldehydes, Ketones and Carboxylic Acids
Topic: Nucleophilic Addition
Idea tested: Grignard Reagent Addition

Same idea in other shifts

Asked 7× in all

12 Apr 2023, Shift 1 · Q76In the following reaction [figure: CH3-C(=O)-CH2-CH(CH3)-Br, (i) Mg (ii) $\mathrm{H_2O}$ -> 'A' (Major Product)] A isHardSingle correctHas a figure
25 Jun 2022, Shift 2 · Q76In the given reaction $2\mathrm{A}$ $\xrightarrow[\text{(iii) } \mathrm{H_2O\ /\ H^+}]{\text{(i) 2 Mg, THF; (ii) Methyl benzoate}}$ [drawn…MediumDiagram basedHas a figure
26 Jun 2022, Shift 1 · Q75[figure: drawn structure with the label MgBr at its upper end and the label MgBr at its lower end, the two joined by a bracket-shaped…HardOtherHas a figure
4 Aug 2021, Shift 2 · Q44The major products A and B in the following reaction sequence are [reaction scheme: see figure_note] (Ph = - $\mathrm{C_6H_5}$ )MediumDiagram basedHas a figure
27 Aug 2021, Shift 2 · Q44Which one of the following is the major product of the given reaction ? [reaction drawn: a fused bicyclic compound - a benzene ring (drawn…HardDiagram basedHas a figure
9 Jan 2020, Shift 1 · Q45Identify (A) in the following reaction sequence : (A) Gives Positive iodoform test…HardDiagram basedHas a figure

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.