JEE Mains Chemistry Past PapershardMCQ SINGLE

Simplified absorption spectra of three complexes ((i) and (ii) and (iii)) of M+n ion are provided beJEE Mains Chemistry Past Papers Chemistry Question

Question

Simplified absorption spectra of three complexes ((i) and (ii) and (iii)) of M+n 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: Absorption max max max Wavelength (nm) A B C (i) [M(NCS)6](–6 + n) (ii) [MF6](–6 + n) (iii) [M(NH3)6]n+ (A) A-(i), (B)-(ii), C-(iii) (B) A-(ii), (B)-(iii), C-(i) (C) A-(ii), (B)-(i), C-(iii) (D) A-(iii), (B)-(i), C-(ii)

Answer: D

💡 Solution & Explanation

Stronger the ligand greater is splitting of d orbitals and smaller will be wave length of light absorbed. The splitting power of ligands is NH3 > S NC > F– So order of wave length of light absorbed is – F S NC NH     

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