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If NaCl si dopd with

10-4  mol % of SrCl2  the concentration of cation vacancies will be

a. 6.02 x 1015 mol -1

b. 6.02 x 1016 mol -1

c. 6.02 x 1017 mol -1

d. 6.02 x 1014 mol -1

Ans. c

(7)

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