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KCET2021Chemistryd and f Block Elements

Which of the following does not represent property stated against it?

Options

  1. ACO ²⁺ < Fe ²⁺ < Mn ²⁺ - Ionic size
  2. BTi < V < Mn - Number of oxidation states
  3. CCr ²⁺ < Mn ²⁺ < Fe ²⁺ - Paramagnetic behaviour
  4. DSc > Cr > Fe - Density

Correct answer

C. Cr ²⁺ < Mn ²⁺ < Fe ²⁺ - Paramagnetic behaviour

Step-by-step solution

The property stated against option (c) is incorrect. The electronic configuration of given elements (ions) are It is clear from above electronic configuration that Mn ²⁺ has maximum number of unpaired electrons (5). It shown maximum paramagnetic behaviours among the given ions.

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