InterviewSolution
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InterviewSolution
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An excess of potassium ions makes KCL crystals appear violet or lilac in colour since …………. .A. some of the anionic sites are occupied by an unpaired electronB. some of the anionic sites are occupied by an pair of electronsC. there are vacancies at some anionic sitesD. F - centres are created which impart colour to the crystals |
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Answer» Correct Answer - A,D When KCl crystals are heated it leads the diposition of potassium ion on surface fo KCl the `Cl^(-)` ions diffuse to the surface of crystal and loss electron by potassium atom to from `K^(+)` ion relared electron occupies anionic site which is known as F - centre and imparta colour to the crystal . |
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