See image — AITS & Test Series Chemistry Question

💡 Solution & Explanation

     2 2 3 2 3 2 2 Ni in Ni Br PPh NiBr PPh Square planar Tetrahedral Red colour Green coloured Diamagnetic Paramagnetic            Tetrahedral splitting of Ni+2 in   2 3 2 NiBr PPh will have configuration 4 4 2 e t , thus unpaired electrons.