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Nickel (Z = 28) combines with a uninegative monodentate ligand X- to form a paramagnetic complex [NiX4]2-. The number of unpaired electron(s) in the nickel and geometry of this complex ion, respectively are
(AIEEE 2006)
  • a)
    one ,tetrahedral
  • b)
    two ,tetrahedral
  • c)
    one ,square planer
  • d)
    two ,square planer
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
Nickel (Z = 28) combines with a uninegative monodentate ligand X-to fo...
28Ni = [Ar] 4s2, 3d8
Ni2+ = [Ar] 3d8

Nickel has two unpaired electrons and geometry is tetrahedral due to sp3 hybridisation.
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Nickel (Z = 28) combines with a uninegative monodentate ligand X-to fo...

Answer:

Explanation:

- **Number of unpaired electrons in nickel**:
- The complex [NiX4]2- has a total charge of 2-.
- Since X is a uninegative monodentate ligand, it will have a charge of -1.
- Therefore, the total charge contributed by X ligands is 4-.
- To balance the overall charge of the complex as 2-, the nickel atom must have a charge of 2+.
- Nickel in its +2 oxidation state has two unpaired electrons.

- **Geometry of the complex ion**:
- The complex [NiX4]2- has a coordination number of 4 (tetrahedral) as there are four ligands (X) attached to the central nickel atom.
- The geometry of a complex depends on the number of bonding pairs and lone pairs of electrons around the central metal atom.
- In this case, with two unpaired electrons in the nickel atom, the geometry is tetrahedral.

Therefore, the correct answer is option 'B': two unpaired electrons, tetrahedral geometry.
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Nickel (Z = 28) combines with a uninegative monodentate ligand X-to form a paramagnetic complex [NiX4]2-. The number of unpaired electron(s) in the nickel and geometry of this complex ion, respectively are(AIEEE 2006)a)one ,tetrahedralb)two,tetrahedralc)one ,square planerd)two,square planerCorrect answer is option 'B'. Can you explain this answer?
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Nickel (Z = 28) combines with a uninegative monodentate ligand X-to form a paramagnetic complex [NiX4]2-. The number of unpaired electron(s) in the nickel and geometry of this complex ion, respectively are(AIEEE 2006)a)one ,tetrahedralb)two,tetrahedralc)one ,square planerd)two,square planerCorrect answer is option 'B'. Can you explain this answer? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about Nickel (Z = 28) combines with a uninegative monodentate ligand X-to form a paramagnetic complex [NiX4]2-. The number of unpaired electron(s) in the nickel and geometry of this complex ion, respectively are(AIEEE 2006)a)one ,tetrahedralb)two,tetrahedralc)one ,square planerd)two,square planerCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Nickel (Z = 28) combines with a uninegative monodentate ligand X-to form a paramagnetic complex [NiX4]2-. The number of unpaired electron(s) in the nickel and geometry of this complex ion, respectively are(AIEEE 2006)a)one ,tetrahedralb)two,tetrahedralc)one ,square planerd)two,square planerCorrect answer is option 'B'. Can you explain this answer?.
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