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Q.

Match the metal ions given in Column I with the spin magnetic moments of the ions given in Column II and assign the correct code : Column-I   Column-II   A.  Co3+       (i) 8 B.M  B. Cr3+           (ii) 35 B.M.   C. Fe3+          (iii) 3 B.M.   D.  Ni2+        (iv) 24 B.M.                            (v) 15 B.M.

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Detailed Solution

Co3+=[Ar]3d6, unpaired e-(n)=4 Spin magnetic moment (μ)=4(4+2)=24 B·M Cr3+=[Ar]3d3, unpaired e-(n)=3  Spin magnetic moment (μ)=3(3+2)=15 B.M Fe3+=[Ar]3d5, unpaired e-(n)=5  Spin magnetic moment (μ)=5(5+2)=35 B·M Ni2+=[Ar]3d8, unpaired e-(n)=2  Spin magnetic moment (μ)=2(2+2)=8 B·M
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