If sodium chloride is heated in vapours of sodium, the colour changes because of

excess of sodium ions.

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excess of chloride ions.

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excess of salt.

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electron trapped in anionic sites.

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Solution

The correct option is D
electron trapped in anionic sites.

Trapped electron in anionic site creates a F-center. The electronst absorbs energy from the visible light falling on the crystals. So the colour changes.

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If sodium chloride is heated in vapours of sodium, the colour changes because of

The correct option is D electron trapped in anionic sites. Trapped electron in anionic site creates a F-center. The electronst absorbs energy from the visible light falling on the crystals. So the colour changes.

The correct option is D
electron trapped in anionic sites.

Trapped electron in anionic site creates a F-center. The electronst absorbs energy from the visible light falling on the crystals. So the colour changes.