Why does table salt, NaCl, sometimes appear yellow in colour ?

1.	Why does table salt, NaCl, sometimes appear yellow in colour ?
Answer» Correct Answer - Yellow colour of NaCl is due to metal excess defect as some `Cl^(-)` ions ( anions) leave their lattice sites and occupied by unpaired electronws. These sites are called F -centres. These electrons absorb energy from bisible reigon for exictation so that complementary colour is yellow .

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Why does table salt, NaCl, sometimes appear yellow in colour ?

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