Question

The increasing order of paramagnetism of the following compound is:

(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 B IV < III < II < I

${Mn}^{2+},{Fe}^{2+},{Ni}^{2+},{Cu}^{2+}-$ central metal atoms

${3d}^5{3d}^6{3d}^8{3d}^9$

$n=5n=4n=2n=1$

$\Rightarrow I>II>III>IV$

decreasing order of paramagnetism.