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Saturday, 10 October

JEE Main 2024 · ChemistryNumerical answerNumerical valueHardMulti-step

JEE Main 6 April 2024, Shift 2, Chemistry Q87

Question 87 of 90 in this shift, Chemistry question 27 of 30, Section B.

Consider the following reactions NiS+HNO3+HCl→A+NO+S+H2O\mathrm{NiS + HNO_3 + HCl \rightarrow A + NO + S + H_2O} A+NH4OH+H3C−C=N−OH/H3C−C=N−OH→B+NH4Cl+H2O\mathrm{A + NH_4OH + H_3C-C{=}N-OH / H_3C-C{=}N-OH \rightarrow B + NH_4Cl + H_2O} (dimethylglyoxime, two H3C−C=N−OH\mathrm{H_3C-C=N-OH} units, one drawn below the other) The number of protons that do not involve in hydrogen bonding in the product B is ________.

Official answer

12

NTA final key.

Chapter
Coordination Compounds
Topic
Cation Analysis
Idea tested
Nickel DMG Complex

Same idea in other shifts

Asked 2× in all
  1. 24 Jun 2022, Shift 1 · Q80During the qualitative analysis of salt with cation y2+y^{2+}, addition of a reagent (X) to alkaline solution of the salt gives a bright…EasySingle correct

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 42 of the 174 JEE Main shifts held from 2017 to 2026.