The anionic sites occupied by unpaired electrons are called F-centres or colour centres . They impart __(X)__ colour to the crystals of NaCl. Excess of lithium makes LiCl crystals __(Y)__and excess of potassium makes KCl crystals _(Z)___. (X),(Y) and (Z) are
A. yellow, green and pink respectively
B. pink , yellow and violet (or lilac) respectively
C. yellow, pink and violet (or lilac ) respectively
D. red, yellow and pink respectively
A. yellow, green and pink respectively
B. pink , yellow and violet (or lilac) respectively
C. yellow, pink and violet (or lilac ) respectively
D. red, yellow and pink respectively
Correct Answer – C