MEDIUMMCQ SINGLEJEE Mains ChemistryInorganic Chemistryd and f Block elementsPrevious Year Questions
Which of the following statements about the interstitial compounds is incorrect? (NEET 2013)
A.Ti3+
B.They have higher melting points than the pure
C.They retain metallic conductivity.
D.They are chemically reactive.✓ Correct
Explanation
The magnetic moment is calculated as, μ = n(n+2) Where n is the number of unpaired electrons and μ is the magnetic moment. The electronic configuration of 3+ Ti Z=22 is 3+ 1 Ti 3d It has 1 unpaired electron. The spin moment is, μ = 1(1+2) = 2 =1.41B.M. The electronic configuration of 2+ Ni Z=28 is 2+ 8 Ni 3d It has 2 unpaired electrons. The spin moment is, μ = 2(2+2) = 8 = 2.84 B.M. The electronic configuration of 3+ Cr Z=24 is 3+ 1 Cr 3d It has 3 unpaired electrons. The spin moment is, μ = 3(3+2) = 15 =3.87 B.M. The electronic configuration of 2+ Mn Z=
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