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

Gujarat BoardEnglish MediumSTD 12 ScienceChemistryThe d & f Block Elements1 Mark
MCQ
Which of the following statement regarding transition elements is incorrect?
  • A
    Their atoms contain partially filled $d$ orbitals.
  • B
    They are capable of showing variable valencies.
  • ✓
    All of their ions are colourless.
  • D
    They form complexes readily.
✓

Answer

Correct option: C.
All of their ions are colourless.
Properties of transition elements include:
  1. Have large charge/ radius ratio.
  2. Are hard and have high densities.
  3. Have high melting and boiling points.
  4. Form compounds which are often paramagnetic.
  5. Show variable oxidation states.
  6. Form coloured ions and compounds.
  7. Form compounds with profound catalytic activity.
  8. Form stable complexes.

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