AP EAPCET 7 Sep 2021 Shift 1 Paper

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Question : 145 of 160

Marks: +1, -0

An excess of potassium ions makes KCl crystals appear violet or lilac in colour because ______

of the presence of impurities.
some of the anionic and cationic sites are vacant.
some of the anionic vacancies are occupied by unpaired electron.
some of the cationic vacancies are occupied by unpaired electron.

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