$A$ solid solution of $CdCl_2$ and $AgCl$ exhibits which type of defect?

Calcium crystallises in a face-centred cubic unit cell with edge length $a = 0.556 \ nm$. Calculate the density. If it contained $0.1 \%$ Frenkel defects,what is the density in $g \ cm^{-3}$?

Which is not correct about the Schottky defects?

The incorrect statement regarding defects in crystalline solid is

Write a short note on impurity defects.

Explain metal deficiency defect.