Home/Transition Elements
General Features (Atomic radius, Electronic structure, Binding energy, Variable oxidation state, paramagnetic and diamagnetic behavior, Color complexes)
Question#1
The Calculated spin only magnetic moment of Cr2+ ion is ? [NEET-2020]
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Solution:
Electronic configuration of Cr _ [Ag]3d54s1
Electronic configuration of Cr- [Ag]3d4
Number of unpaired e_ = 4
Spin only magnetic moment = \( \sqrt{n(n+2} \)
n = Number of unpaired e_
Spin only magnetic moment = \( \sqrt{4(4+2} \) = \( \sqrt{24} \ BM \)
= 4.9 BM
Question#2
Which of the following transition metal show 3d5 configuration in its +2 oxidation state [MDCAT2023]
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Solution:
Mn = [Ar]4s2,3d5
Mn+2 = [Ar],3d5
Question#3
The coordination number of a metal in coordination compounds is [MP PET 1996; KCET (Engg./Med.) 1999]
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Solution:
Question#4
The coordination number of Pt in \( [Pt(NH_3)_4Cl_2]^{++} \) ion is [MP PET 1995]
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Solution:
Question#5
Scandium has the atomic number 21, which one will be its electronic configuration MDCAT2017
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Solution:
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7. Reaction kinetics
8. Thermochemistry
9. Electrochemistry
11. s and p block Elements
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15. Benzene
16. Alcohol and phenols
18. Aldehyde and ketones
19. Carboxylic acid
20. Macromolecules