Question

The increasing order of paramagnetism of :
(I) $MnS{O}_4.4H_{2}O$ (II) $FeS{O}_4.7H_{2}O$ (III) $NiS{O}_4.6H_{2}O$ (IV) $CuS{O}_4.5H_{2}O$

• A. I < II < III < IV
• B. IV < III < II < I
• C. III < IV < II < I
• D. III < IV < I < II

Answer 1

The correct option is A I < II < III < IV

$M{n}^{2+}$ n = 5 ; $F{e}^{2+}$ n = 4 ; $N{i}^2$+ n = 2 and $Cu^{2}+ n = 1n = number of unpaired electron and n $\alpha$ paramagnetism.