9. कौन से संक्रमण धातु आयन प्रायः रंगहीन होते हैं ?
Which transition metal ion are generally colourless ?
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Scandium(III) complexes are colourless because no visible light is absorbed. In the zinc case, the 3d level is completely full - there aren't any gaps to promote an electron in to. Zinc complexes are also colourless. Simple tetrahedral complexes have four ligands arranged around the central metal ion.
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Answer:
Scandium metal ion are colourless
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