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Friday, 9 October

JEE Main 2024 · ChemistryNumerical answerNumerical valueHardMulti-step

JEE Main 9 April 2024, Shift 2, Chemistry Q87

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

Consider the following test for a group-IV cation. M2++H2S→A\mathrm{M^{2+} + H_2S \rightarrow A} (Black precipitate) + byproduct A\mathrm{A} + aqua regia →B+NOCl+S+H2O\rightarrow \mathrm{B + NOCl + S + H_2O} B+KNO2+CH3COOH→C\mathrm{B + KNO_2 + CH_3COOH \rightarrow C} + byproduct The spin-only magnetic moment value of the metal complex C is ________ BM (Nearest integer)

Official answer

0

NTA final key.

Chapter
Coordination Compounds
Topic
Cation Analysis
Idea tested
Group IV Sulfides

Same idea in other shifts

Asked 2× in all
  1. 4 Apr 2026, Shift 2 · Q69Among Fe3+\mathrm{Fe^{3+}}, Pb2+\mathrm{Pb^{2+}}, Cu2+\mathrm{Cu^{2+}} and Mn2+\mathrm{Mn^{2+}}, identify the one that gets precipitated out while…MediumSingle 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.