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

Rajasthan BoardEnglish MediumSTD 12 ScienceChemistryThe d & f Block Elements1 Mark
Question
Most copper (I) compounds are found to be colourless. This is due to:
✓

Answer

  1. Completely filled d-level in Cu(I).
Explanation:
In copper (I) ion there are no vacant d orbitals as it is diamagnetic. Copper(I) ion being less charged has small ligand field effect and the transition is in the infrared region in which no color is perceived by human eye.

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