Match the metal ions given in Column I with the spin magnetic moments of the ions given in Column II and asign the correct code:

Options

A. `{:(A,B,C,D),(iv,v,ii,i):}`
B. `{:(A,B,C,D),(i,ii,iii,iv):}`
C. `{:(A,B,C,D),(iv,i,ii,iii):}`
D. `{:(A,B,C,D),(iii,v,i,ii):}`

Answer

A

Explanation

Spin magnetic moment `(mu)` of all the cations may be calculated as follows:
A.`Co^(3+),[Ar]3d^(6)(n=4),mu=sqrt(4(4+2))=sqrt(24)BM`
B. `Cr^(3+),[Ar]3d^(3)(n=3),mu=sqrt(3(3+2))=sqrt(15)BM`
C. `Fe^(3+),[Ar]3d^(5)(n=5),mu=sqrt(5(5+2))=sqrt(35)BM`
D. `Ni^(2+),[Ar]3d^(8)(n=2),mu=sqrt(2(2+2))=sqrt(8)BM`
Thus, A-iv,B-v,C-ii,D-I
Therefore, a is the correct match.