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NEET 2013
Exam
NEET
Year
2013
Subject
Chemistry
Chapter
d and f Block Elements

NEET 2013 · Chemistry · d and f Block Elements

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

Sc(Z=21)\mathrm{Sc}(\mathrm{Z}=21) is transition element but Zn\mathrm{Zn} (Z=30)(Z=30) is not because:

Options

  1. Aboth Se31\mathrm{Se}^{31} and Zn2′\mathrm{Zn}^{2 \prime} ions are colourless and form white compounds
  2. Bin case of Sc,3d\mathrm{Sc}, 3 d orbitals are partially filled but in Zn\mathrm{Zn} these are completely filled
  3. Cleast electron is assumed to be added to 4s4 s level in case of Zn\mathrm{Zn}
  4. Dboth Sc\mathrm{Sc} and Zn\mathrm{Zn} do not exhibit variable oxidation

Correct answer

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

Step-by-step solution

Scandium has incompletely filled 3d3 d-orbitals hence it is transition element, while there are no incompletely filled dd-orbitals in zinc.
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