See image — AITS & Test Series Chemistry Question

💡 Solution & Explanation

H2O is a weak field ligand, so cannot force pairing of electron(s)   6 4 2 2g g 6 Zn H O t e n 0           3 1 2 2g g 6 Cr H O t e n 4           3 2 2 2g g 6 Mn H O t e n 5           6 3 2 2g g 6 Cu H O t e n 1        