Give examples of displacement defects in solids.

Calcium crystallizes in a face-centred cubic $(FCC)$ lattice with an edge length of $556 \ pm$. Calculate the density if:
$(i)$ There is $0.1 \%$ Schottky defect.
$(ii)$ There is $0.1 \%$ Frenkel defect.

Explain Schottky defect and Frenkel defect.

Which type of defect is observed in $AgBr$?

When $AgCl$ is doped with $10^{-4} \, \text{mole percent}$ $RuCl_3$,what will be the concentration of cationic vacancies per mole of $AgCl$?

Which of the following point defects are shown by $AgBr_{(s)}$ crystals?
$A$. Schottky defect
$B$. Frenkel defect
$C$. Metal excess defect
$D$. Metal deficiency defect