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Chemistry Co-ordinatios Compounds General Single Correct MCQ

Published by: CGP EDU Academic Team

Published on: August 12, 2026

Potassium ferrocyanide and potassium ferricyanide can be differentiated by measuring the solid state magnetic moment.

The complex [Co(NH3)5Br]SO4 and [Co(NH3)5 SO4]Br can be differentiated by adding aqueous solution of barium chloride

The complex [Co(NH3)5Cl]Br and [Co(NH3)5Br]Cl can be differentiated by adding aqueous solution of silver nitrate.

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The correct answer is:

K4[Fe(CN)6] ; 3d6 ,

CN– is strong field ligand and thus compels for the pairing of electrons.

K3 [Fe(CN)6] ; 3d5 ,

CN– is strong field ligand and thus compels for the pairing of electrons.

SO42– (aq) + Ba2+ (aq) BaSO4 ↓ (white); Br– (aq) + Ba2+ (aq) no visible change.

Cl– (aq) + Ag+ (aq) AgCl ↓ (white); Br– (aq) + Ag+ (aq) AgBr ↓ (pale yellow)

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