Question

Match list I with list II and select the correct answer using the codes given below the lists.

List I Metal ion		List II Magnetic moment(BM)
A.	Cr3+	1.	$\sqrt{35}$
B.	Fe2+	2.	$\sqrt{30}$
C.	Ni2+	3.	$\sqrt{24}$
D.	Mn2+	4.	$\sqrt{15}$
		5.	$\sqrt{8}$

Codes

• A. A-l, B-3, C-5, D-4
• B. A-2, B-3, C-5, D-1
• C. A-4, B-3, C-5, D-1
• D. A-4, B-5, C-3, D-1

Answer 1

Answer: (C)

For $Cr^{3+}= 3d^{3} , μ = \sqrt{3\left(3+2\right)}=\sqrt{15} $B.M.
For $Fe^{2+} = 3d^{6} , μ = \sqrt{4\left(4+2\right)} = \sqrt{24}$ B.M.
For $Ni^{2+}=3d^{8}, μ = \sqrt{2\left(2+2\right)}=\sqrt{8}$ B.M.
For $Mn^{2+}=3d^{5}, μ = \sqrt{5\left(5+2\right)}=\sqrt{35} $B.M.