Question
Chemistry Question on d -and f -Block Elements
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+ |
b. | Cr3+ |
c. | Fe3+ |
d | Ni2+ |
v |
A
a - iii , b - v , c - i , d - ii
B
a - iv , b - v , c - ii , d - i
C
a - iv , b - i, c - ii , d - iii
D
a - i , b - ii , c - iii , d - iv
Answer
a - iv , b - v , c - ii , d - i
Explanation
Solution
Co3+=[Ar]3d6, Unpaired e−(n)=4
Spin magnetic moment =4(4+2)=24BM
Cr3+=[Ar]3d3, Unpaired e−(n)=3
Spin magnetic moment =3(3+2)=15BM
Fe3+=[Ar]3d5, Unpaired e−(n)=5
Spin magnetic moment =5(5+2)=35BM
Ni2+=[Ar]3d8, Unpaired e−(n)=2
Spin magnetic moment =2(2+2)=8BM