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when a crystal of NaCl is heated in sodium vapour, it acquires a yellow colour. The yellow colour is due to non stoichiometric defect. Name the defect.

when a crystal of NaCl is heated in sodium vapour, it acquires a yellow colour. The yellow
colour is due to non stoichiometric defect. Name the defect.

Grade:Upto college level

1 Answers

Gaurav
askIITians Faculty 164 Points
6 years ago
Hello Student
when a crystal of NaCl is heated in sodium vapour, it acquires a yellow colour. The yellow colour is due to Metal excess defect due to anionic vacancies:The anionic sites occupied by unpaired electrons are called F-centre. They impart yellow colour to the crystals of NaCl.

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