See image — AITS & Test Series Chemistry Question

💡 Solution & Explanation

  3 3 6 Co NH      - Octahedral and diamagnetic   2 3 6 Fe NH      - Octahedral and paramagnetic.   2 4 Pt CN      - Square planar,   2 4 CuCl - Tetrahedral   2 3 6 Ni NH      - Primary valency = 2   3 3 6 Cr NH      - Primary valency = 3