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Saturday, 31 October

JEE Main 2021 · ChemistryMultiple choiceMatch the listMediumRecall

JEE Main 17 March 2021, Shift 2, Chemistry Q40

Question 40 of 90 in this shift, Chemistry question 10 of 30, Section A.

Match List - I with List - II : List - I List - II (a) [Co(NH3)6] [Cr(CN)6][\mathrm{Co(NH_3)_6}]\ [\mathrm{Cr(CN)_6}] (i) Linkage isomerism (b) [Co(NH3)3 (NO2)3][\mathrm{Co(NH_3)_3}\ \mathrm{(NO_2)_3}] (ii) Solvate isomerism (c) [Cr(H2O)6]Cl3[\mathrm{Cr(H_2O)_6}]\mathrm{Cl_3} (iii) Co-ordination isomerism (d) cis-[CrCl2(ox)2]3−\textit{cis}\text{-}[\mathrm{CrCl_2(ox)_2}]^{3-} (iv) Optical isomerism Choose the correct answer from the options given below :
  1. (1)(a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)
  2. (2)(a)-(ii), (b)-(i), (c)-(iii), (d)-(iv)
  3. (3)(a)-(iii), (b)-(i), (c)-(ii), (d)-(iv)Official answer
  4. (4)(a)-(iv), (b)-(ii), (c)-(iii), (d)-(i)

Official answer

Option 3

NTA final key.

Chapter
Coordination Compounds
Topic
Coordination Isomerism
Idea tested
Structural Isomerism Types

Same topic in other shifts

All Coordination Isomerism questions
  1. 2 Apr 2026, Shift 1 · Q715.335.33 g of CrCl3⋅6H2O\mathrm{CrCl_3{\cdot}6H_2O}, which is a 1:31:3 electrolyte, is dissolved in water and is passed through a cation exchanger.…HardNumerical value
  2. 2 Apr 2026, Shift 2 · Q61Which of the following complexes will show coordination isomerism? A. [Ag(NH3)2][Ag(CN)2][Ag(NH_3)_2][Ag(CN)_2] B. [Co(NH3)6][Cr(CN)6][Co(NH_3)_6][Cr(CN)_6] C.…MediumSingle correct
  3. 5 Apr 2026, Shift 2 · Q61Identify the correct statements from the following A. [Fe(C2O4)3]3−\mathrm{[Fe(C_2O_4)_3]^{3-}} is the most stable complex among…HardOther
  4. 6 Apr 2026, Shift 2 · Q71An excess of AgNO3\mathrm{AgNO_3} is added to 100 mL of a 0.05 M solution of tetraaquadichloridochromium (III) chloride. The number of moles…EasyNumerical value
  5. 3 Apr 2025, Shift 1 · Q72The number of optical isomers exhibited by the iron complex (A) obtained from the following reaction is ______.…MediumNumerical value
  6. 4 Apr 2025, Shift 2 · Q75A metal complex with a formula MCl4⋅3NH3\mathrm{MCl_4\cdot3NH_3} is involved in sp3d2\mathrm{sp^3d^2} hybridisation. It upon reaction with excess of…MediumNumerical value

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.