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The d-electron configurations of Cr2+, Mn2+, Fe2+ and Ni2+ are 3d4, 3d5, 3d6 and 3d8 respectively. Which one of the following aqua complexes will exhibit the minimum paramagnetic behaviour?
(At No. Cr = 24, Mn = 25, Fe = 26, Ni = 28)
  • a)
    [ CrH2O6]2+
  • b)
    [ MnH2O6]2+
  • c)
    [ FeH2O6]2+
  • d)
    [ NiH2O6]2+
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
The d-electron configurations of Cr2+, Mn2+, Fe2+ and Ni2+ are 3d4, 3d...
Analysis:
To determine the aqua complex that will exhibit the minimum paramagnetic behavior among Cr2+, Mn2+, Fe2+, and Ni2+, we need to consider the number of unpaired electrons present in the d-orbitals of each metal ion.

Explanation:
- Cr2+ (3d4): Cr2+ has 4 unpaired electrons in its d-orbitals, making it paramagnetic.
- Mn2+ (3d5): Mn2+ has 5 unpaired electrons in its d-orbitals, making it paramagnetic.
- Fe2+ (3d6): Fe2+ has 4 unpaired electrons in its d-orbitals, making it paramagnetic.
- Ni2+ (3d8): Ni2+ has 2 unpaired electrons in its d-orbitals, making it less paramagnetic compared to the other options.
Therefore, the aqua complex [Ni(H2O)6]2+ will exhibit the minimum paramagnetic behavior among the given options because Ni2+ has the lowest number of unpaired electrons in its d-orbitals.
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The d-electron configurations of Cr2+, Mn2+, Fe2+ and Ni2+ are 3d4, 3d5, 3d6 and 3d8 respectively. Which one of the following aqua complexes will exhibit the minimum paramagnetic behaviour?(At No. Cr = 24, Mn = 25, Fe = 26, Ni = 28)a)[ CrH2O6]2+b)[ MnH2O6]2+c)[ FeH2O6]2+d)[ NiH2O6]2+Correct answer is option 'D'. Can you explain this answer?
Question Description
The d-electron configurations of Cr2+, Mn2+, Fe2+ and Ni2+ are 3d4, 3d5, 3d6 and 3d8 respectively. Which one of the following aqua complexes will exhibit the minimum paramagnetic behaviour?(At No. Cr = 24, Mn = 25, Fe = 26, Ni = 28)a)[ CrH2O6]2+b)[ MnH2O6]2+c)[ FeH2O6]2+d)[ NiH2O6]2+Correct answer is option 'D'. Can you explain this answer? for JEE 2025 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about The d-electron configurations of Cr2+, Mn2+, Fe2+ and Ni2+ are 3d4, 3d5, 3d6 and 3d8 respectively. Which one of the following aqua complexes will exhibit the minimum paramagnetic behaviour?(At No. Cr = 24, Mn = 25, Fe = 26, Ni = 28)a)[ CrH2O6]2+b)[ MnH2O6]2+c)[ FeH2O6]2+d)[ NiH2O6]2+Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for JEE 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The d-electron configurations of Cr2+, Mn2+, Fe2+ and Ni2+ are 3d4, 3d5, 3d6 and 3d8 respectively. Which one of the following aqua complexes will exhibit the minimum paramagnetic behaviour?(At No. Cr = 24, Mn = 25, Fe = 26, Ni = 28)a)[ CrH2O6]2+b)[ MnH2O6]2+c)[ FeH2O6]2+d)[ NiH2O6]2+Correct answer is option 'D'. Can you explain this answer?.
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