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Statement 1: Solids having more F-centres possess intense colours.
Statement 2: Excess of ${Na}^{+}$ in NaCl solid having F-centres makes it appear pink.

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Both Statement 1 and Statement 2 are true

Both Statement 1 and Statement 2 are false.

Statement 1 is true but Statement 2 is false.

Statement 1 is false but Statement 2 is true.

answer is C.

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Detailed Solution

Excess ${Na}^{+}$ in NaCl solid at F-centres develops yellow colours.

The electrons trapped in anionic vacancies absorb energy of visible light giving yellow colour to NaCl ,pink colour to LiCl and lilac colour to KCl

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