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The d & f Block Elements — Chemistry STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 ScienceChemistryThe d & f Block Elements1 Mark
MCQ
D-block elements form complexes because they have:
  • A
    Vacant orbitals.
  • B
    Small sizes.
  • C
    Higher nuclear charge.
  • D
    All of the above.
✓

Answer

  1. All of the above.

Explanation:

Transition metals  has incompletely filled d orbital. They have vacant orbitals to accept coordination bond. Complex compounbs are those in which the metal ion bind a number of anions or neutral molecules giving complex species with characteristics properties. The transition metals form a large no. of complex compounds.

This is due to the comparatively smaller size of the metal ions,their high ionic charges and the availability of d orbitals for bond formation.

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