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Of the following complex ions, which is diamagnetic in nature ? [2011]
- a)[NiCl4]2–
- b)[Ni(CN)4]2–
- c)[CuCl4]2–
- d)[CoF6]3–
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
Of the following complex ions, which is diamagnetic in nature ? [2011]...
Since, the coordination number of Ni in this complex is 4, the configuration of Ni++ at first sight shows that the complex is paramagnetic with two unpaired electron. However, experiments show that the complex is diamagnetic. This is possible when the 3d electrons rearrange against the Hund’s rule as shown below. This is in accordance with the fact that the ligand involved here is strong i.e., CN– ion.
Ni++ (after rearrangement) 
Hence, now dsp2 hybridization involving one 3d, one 4s and two 4p orbitals, takes place leading to four dsp2 hybrid orbitals, each of which accepts four electron pairs from CN– ion forming [Ni (CN)4]2– ion.
Thus, the complex is diamagnetic as it has no unpaired electron.
Most Upvoted Answer
Of the following complex ions, which is diamagnetic in nature ? [2011]...
The complex ion [NiCl4]2- is diamagnetic in nature.
To determine the magnetic nature of a complex ion, we need to consider the electronic configuration of the central metal ion.
In this case, the central metal ion is nickel (Ni), which has an atomic number of 28. The electronic configuration of Ni is 1s2 2s2 2p6 3s2 3p6 4s2 3d8.
In the complex ion [NiCl4]2-, the nickel ion loses two electrons to form the 2+ charge. Therefore, the electronic configuration of the nickel ion in the complex ion is 1s2 2s2 2p6 3s2 3p6 4s0 3d8.
In this configuration, all the orbitals are fully filled or paired, making the complex ion diamagnetic.
To determine the magnetic nature of a complex ion, we need to consider the electronic configuration of the central metal ion.
In this case, the central metal ion is nickel (Ni), which has an atomic number of 28. The electronic configuration of Ni is 1s2 2s2 2p6 3s2 3p6 4s2 3d8.
In the complex ion [NiCl4]2-, the nickel ion loses two electrons to form the 2+ charge. Therefore, the electronic configuration of the nickel ion in the complex ion is 1s2 2s2 2p6 3s2 3p6 4s0 3d8.
In this configuration, all the orbitals are fully filled or paired, making the complex ion diamagnetic.
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Of the following complex ions, which is diamagnetic in nature ? [2011]a)[NiCl4]2–b)[Ni(CN)4]2–c)[CuCl4]2–d)[CoF6]3–Correct answer is option 'B'. Can you explain this answer? for Class 12 2025 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about Of the following complex ions, which is diamagnetic in nature ? [2011]a)[NiCl4]2–b)[Ni(CN)4]2–c)[CuCl4]2–d)[CoF6]3–Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for Class 12 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Of the following complex ions, which is diamagnetic in nature ? [2011]a)[NiCl4]2–b)[Ni(CN)4]2–c)[CuCl4]2–d)[CoF6]3–Correct answer is option 'B'. Can you explain this answer?.
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