CBSE Class 12-science Answered
What is the colour of lithium chloride crystal in excess of lithium
Asked by studentrifath | 16 Feb, 2018, 12:25: PM
Expert Answer
The colour of LiCl crystals in excess of lithium is Pink.
In excess of lithium, when crystals of LiCl are heated Cl - Cl ions from crystal diffuse on the surface and
combine with ionised Li to form LiCl.
The released unpaired electrons occupy the anionic sites known as F-centers.
Greater the number of F-centers greater is the intensity of colour.
The excitation of these electrons by absorption of light energy results in the pink colour of LiCl crystals.
Answered by Varsha | 16 Feb, 2018, 12:50: PM
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