JEE PYQ: Coordination Compounds Question 9
Question 9 - 2021 (25 Feb Shift 2)
If which of the following order the given complex ions are arranged correctly with respect to their decreasing spin only magnetic moment?
(i) $[\text{FeF}_6]^{3-}$ (ii) $[\text{Co(NH}_3)_6]^{3+}$ (iii) $[\text{NiCl}_4]^{2-}$ (iv) $[\text{Cu(NH}_3)_4]^{2+}$
(a) (ii) > (i) > (iii) > (iv) (b) (iii) > (iv) > (ii) > (i) (c) (ii) > (iii) > (i) > (iv) (d) (i) > (iii) > (iv) > (ii)
Show Answer
Answer: (d)
Solution
$[\text{FeF}_6]^{3-}$: 5 unpaired; $[\text{Co(NH}_3)_6]^{3+}$: 0 unpaired; $[\text{NiCl}_4]^{2-}$: 2 unpaired; $[\text{Cu(NH}_3)_4]^{2+}$: 1 unpaired. Order: (i) 5 > (iii) 2 > (iv) 1 > (ii) 0.
BETA
