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Statement I: - Potassium ferrocyanide is not paramagnetic whereas potassium ferricyanide is paramagnetic.
Statement II: - Crystal Field splitting in the ferrocyanide ion is stronger than that of ferricyanide.
  • a)
    Both Statement I and Statement II are correct.
  • b)
    Both Statement I and Statement II are incorrect.
  • c)
    Statement I is correct and Statement II is incorrect
  • d)
    Statement I is incorrect and Statement II is correct.
Correct answer is option 'A'. Can you explain this answer?
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Statement I: - Potassium ferrocyanide is not paramagnetic whereas pota...
The formula of potassium ferrocyanide is K4[Fe(CN)6]
  • K4[Fe(CN)6]  → 4K+ + [Fe(CN)6]4-
  • Let O.S. of Fe is x 
  • O.S. of CN- is -1 
  • The charge on complex anion is -4
  • Thus x + 6 (-1) = -4
  • x = +2
  • So Fe is in a +2 oxidation state
  • The electronic configuration of Fe is [Ar] 3d64s2 
  • Electronic configuration of Fe2+ is [Ar]3d6
  • Now CN- is a strong field ligand thus electron pairing occurs 
  • So there is no unpaired electron , thus the complex is diamagnetic 
The formula of potassium ferricyanide is K3[Fe(CN)6]
  • K3[Fe(CN)6] → 3K+ [Fe(CN)6]3-
  • let O.S. of Fe is y
  • O.S. of CN- is -1 
  • The charge on complex anion is -3
  • Thus y + 6 (-1) = -4
  • y = +3
  • So Fe is in a +3 oxidation state
  • The electronic configuration of Fe is [Ar] 3d64s2 
  • Electronic configuration of Fe2+ is [Ar]3d5
  • Now CN- is a strong field ligand thus electron pairing occurs 
  • So there is one unpaired electron, thus the complex is paramagnetic 
Again in potassium ferrocyanide, Fe is in a +2 oxidation state, and in potassium ferricyanide Fe is in a +3 oxidation state
Now increasing the oxidation state the crystal field splitting increases
So, crystal field splitting in potassium ferricyanide is greater than in potassium ferrocyanide
So, Both Statement I and Statement II are correct.
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Statement I: - Potassium ferrocyanide is not paramagnetic whereas potassium ferricyanide is paramagnetic.Statement II: - Crystal Field splitting in the ferrocyanide ion is stronger than that of ferricyanide.a)Both Statement I and Statement II are correct.b)Both Statement I and Statement II are incorrect.c)Statement I is correct and Statement II is incorrectd)Statement I is incorrect and Statement II is correct.Correct answer is option 'A'. Can you explain this answer?
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Statement I: - Potassium ferrocyanide is not paramagnetic whereas potassium ferricyanide is paramagnetic.Statement II: - Crystal Field splitting in the ferrocyanide ion is stronger than that of ferricyanide.a)Both Statement I and Statement II are correct.b)Both Statement I and Statement II are incorrect.c)Statement I is correct and Statement II is incorrectd)Statement I is incorrect and Statement II is correct.Correct answer is option 'A'. Can you explain this answer? for UGC NET 2024 is part of UGC NET preparation. The Question and answers have been prepared according to the UGC NET exam syllabus. Information about Statement I: - Potassium ferrocyanide is not paramagnetic whereas potassium ferricyanide is paramagnetic.Statement II: - Crystal Field splitting in the ferrocyanide ion is stronger than that of ferricyanide.a)Both Statement I and Statement II are correct.b)Both Statement I and Statement II are incorrect.c)Statement I is correct and Statement II is incorrectd)Statement I is incorrect and Statement II is correct.Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for UGC NET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Statement I: - Potassium ferrocyanide is not paramagnetic whereas potassium ferricyanide is paramagnetic.Statement II: - Crystal Field splitting in the ferrocyanide ion is stronger than that of ferricyanide.a)Both Statement I and Statement II are correct.b)Both Statement I and Statement II are incorrect.c)Statement I is correct and Statement II is incorrectd)Statement I is incorrect and Statement II is correct.Correct answer is option 'A'. Can you explain this answer?.
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