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  3. Chemistry
  4. Formation of coloured ions by transition metals signifies;

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Q. Formation of coloured ions by transition metals signifies;

UPSEEUPSEE 2009

Solution:

Transition metals due to the presence of partially filled d-orbitals, are coloured.

The unpaired electron present in partially filled $d$ -orbital is excited to the higher energy $d$ -orbital by absorbing energy from visible light and thus exhibits the complementary colour. Due to which the transition metal ions appear coloured.