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Saturday, 31 October

JEE Main 2020 · ChemistryMultiple choiceSingle correctHardMulti-step

JEE Main 9 January 2020, Shift 1, Chemistry Q37

Question 37 of 75 in this shift, Chemistry question 12 of 25, Section A.

Complex X of composition Cr(H2O)6Cln\mathrm{Cr(H_2O)_6Cl_n} has a spin only magnetic moment of 3.83 BM. It reacts with AgNO3\mathrm{AgNO_3} and shows geometrical isomerism. The IUPAC nomenclature of X is :
  1. (1)Hexaaqua chromium(III) chloride
  2. (2)Tetraaquadichlorido chromium(IV) chloride dihydrate
  3. (3)Tetraaquadichlorido chromium(III) chloride dihydrateOfficial answer
  4. (4)Dichloridotetraaqua chromium(IV) chloride dihydrate

Official answer

Option 3

NTA final key (Jan 2020).

Chapter
Coordination Compounds
Topic
Coordination Nomenclature
Idea tested
IUPAC Ligand Naming

Same topic in other shifts

All Coordination Nomenclature questions
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  3. 6 Apr 2023, Shift 2 · Q72The IUPAC name of K3[Co(C2O4)3]\mathrm{K_3[Co(C_2O_4)_3]} is:-EasySingle correct
  4. 29 Jul 2022, Shift 2 · Q86Sum of oxidation state (magnitude) and coordination number of cobalt in Na[Co(bpy)Cl4]\mathrm{Na[Co(bpy)Cl_4]} is ____. (Given: bpy = [figure:…EasyNumerical valueHas a figure
  5. 30 Jul 2022, Shift 2 · Q50In the ring test of NO3−\mathrm{NO_3^-} ion what is the oxidation number of iron in the complex (brown ring)…MediumSingle correct
  6. 3 Aug 2021, Shift 2 · Q40The oxidation states of Fe in [Fe(NCS)(NH3)5]SO4\mathrm{[Fe(NCS)(NH_3)_5]SO_4}, Na3[Fe(S2O3)3]\mathrm{Na_3[Fe(S_2O_3)_3]} and [Fe(CO)5]\mathrm{[Fe(CO)_5]} respectively areEasySingle 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 108 of the 174 JEE Main shifts held from 2017 to 2026.