JEE Main 2020 — Coordination Compounds Question with Solution
From: JEE Main 2020 (Online) 2nd September Evening Slot
Question
Simplified absorption spectra of three
complexes ((i), (ii) and (iii)) of Mn+ ion are
provided below; their max values are marked
as A, B and C respectively. The correct match
between the complexes and their max values is
(i) [M(NCS)6](–6 + n)
(ii) [MF6](–6 + n)
(iii) [M(NH3)6]n+
(i) [M(NCS)6](–6 + n)
(ii) [MF6](–6 + n)
(iii) [M(NH3)6]n+
This question includes a diagram. The text above accompanies the figure.
Choose an option
Show full solutionCorrect option: D
Correct answer
DA-(iii), B-(i), C-(ii)
Step-by-step explanation
Stronger the ligand greater is splitting of d orbitals and smaller will be wavelength of light absorbed.
The splitting of ligand is F– < NCS– < NH3
So order of wavelength of light absorbed is
(max)NH3 < (max)NCS– < (max)F–
The splitting of ligand is F– < NCS– < NH3
So order of wavelength of light absorbed is
(max)NH3 < (max)NCS– < (max)F–
Practice this on the real CBT interface
Solve this JEE Main question (and the rest of the Coordination Compounds chapter) on PrepSharp's TCS iON-style CBT player — with timer, bookmarks and session analytics.
Solve interactively →About this question
This is a previous-year question from JEE Main 2020, covering the Coordination Compounds chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.