The color of LiCl due to F-centers is ....... | vedclass

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(B) When $LiCl$ crystals are heated in an atmosphere of $Li$ vapor,excess $Li$ atoms deposit on the surface of the crystal.$Cl^-$ ions diffuse to the

Vedclass · Accepted Answer

Pale pink

Vedclass · Answer

(B) When $LiCl$ crystals are heated in an atmosphere of $Li$ vapor,excess $Li$ atoms deposit on the surface of the crystal.$Cl^-$ ions diffuse to the surface and combine with $Li$ atoms to form $LiCl$.This process releases electrons which diffuse into the crystal and occupy the anionic sites (vacancies) previously held by $Cl^-$ ions.These anionic sites occupied by unpaired electrons are called $F$-centers (from the German word $Farbenzenter$,meaning color centers).These $F$-centers absorb energy from visible light and impart a characteristic color to the crystal.For $LiCl$,the presence of $F$-centers results in a $Pale  pink$ color.

The color of $LiCl$ due to $F$-centers is .......

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