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NEET2013Chemistryd and f Block ElementsActual

Sc ( Z =21) is transition element but Zn (Z=30) is not because:

Options

  1. Aboth Se ³¹ and Zn ^ 2 ions are colourless and form white compounds
  2. Bin case of Sc , 3 d orbitals are partially filled but in Zn these are completely filled
  3. Cleast electron is assumed to be added to 4 s level in case of Zn
  4. Dboth Sc and Zn do not exhibit variable oxidation

Correct answer

B. in case of Sc , 3 d orbitals are partially filled but in Zn these are completely filled

Step-by-step solution

Scandium has incompletely filled 3 d -orbitals hence it is transition element, while there are no incompletely filled d -orbitals in zinc.

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