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 : [table] Column-I | Column-II ; a. $Co^{3+}$ | i. $\sqrt{8}$ B.M. ; b. $Cr^{3+}$ | ii. $\sqrt{35}$ B.M. ; c. $Fe^{3+}$ | iii. $\sqrt{3}$ B.M. ; d. $Ni^{2+}$ | iv. $\sqrt{24}$ B.M. ; | v. $\sqrt{15}$ B.M. [/table]
A) (a)-(iv), (b)-(i), (c)-(ii), (d)-(iii)
B) (a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)
C) (a)-(iv), (b)-(v), (c)-(ii), (d)-(i)
D) (a)-(iii), (b)-(v), (c)-(i), (d)-(ii)
Explanation
[Solution] Unpaired electrons: $Co^{3+}$ ($d^6$) 4 → $\sqrt{24}$; $Cr^{3+}$ ($d^3$) 3 → $\sqrt{15}$; $Fe^{3+}$ ($d^5$) 5 → $\sqrt{35}$; $Ni^{2+}$ ($d^8$) 2 → $\sqrt{8}$. Answer (3).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.