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MHT CET202311 May 2023Evening ShiftChemistryPractical ChemistryActual

Which from following cations in their respective oxidation states develops colourless aqueous solution?

Options

  1. AFe ³⁺
  2. BFe ²⁺
  3. CCu ²⁺
  4. DCu ⁺

Correct answer

D. Cu ⁺

Step-by-step solution

array |c|c|c| Ion & array c Outer electronic configuration array & array c No. of unpaired electrons array Fe ³⁺ & 3 ~d ^5 & 5 Fe ²⁺ & 3 ~d ^6 & 4 Cu ²⁺ & 3 ~d ^9 & 1 Cu ⁺ & 3 ~d ¹⁰ & 0 array Cu ⁺ is colourless because of the absence of unpaired electrons.

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