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KCET2021Chemistryd and f Block Elements

Which one of the following is correct for all elements from Sc to Cu?

Options

  1. AThe lowest oxidation state shown by them is +2
  2. B4 s orbital is completely filled in the ground state
  3. C3 d orbital is not completely filled in the ground state
  4. DThe ions in +2 oxidation states are paramagnetic

Correct answer

D. The ions in +2 oxidation states are paramagnetic

Step-by-step solution

From Sc ²⁺ to Cu ²⁺ all the ions are paramagnetic in nature as they all contain unpaired electrons as shown below.

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