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JEE Main & Advanced Chemistry The Solid State / ठोस प्रावस्था Question Bank Defects in Crystal

  • question_answer
    In the laboratory, sodium chloride is made by burning the sodium in the atmosphere of chlorine which is yellow in colour. The cause of yellow colour is

    A)                 Presence of \[N{{a}^{+}}\]ions in the crystal lattice

    B)                 Presence of \[C{{l}^{-}}\]ions in the crystal lattice

    C)                 Presence of electron in the crystal lattice

    D)                 Presence of face centered cubic crystal lattice

    Correct Answer: C

    Solution :

                    Yellow colour on heating \[NaCl\] in presence of \[Na\] is due to presence of electrons in anion vacancies (F-centres).


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