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QJEEM05Ch7665: JEE Main 2005 Chemistry - Class 12 JEEM05Ch7665 Solution: Which one of the following cyano complexes would exhibit the…

Which one of the following cyano complexes would exhibit the lowest value of paramagnetic behaviour?
(At. No. Cr = 24, Mn = 25, Fe = 26, Co = 27)

Multiple Choice Options

  • A [Cr(CN)6]-3
  • B [Mn(CN)6]-3
  • C [Fe(CN)6]-3
  • D [Co(CN)6]-3

Step-by-Step Verified Solution

No. of unpaired electron
a) Co3+ 0
b) Fe3+ 1
c) Mn3+ 2
d) Cr3+ 3


The effective magnetic moment is given by the number of unpaired electrons in a substance, the lesser the number of unpaired electrons lower is its magnetic moment in Bohr −- Magneton and lower shall be its paramagnetism

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