What type of stoichiometric defect is shown by:
$(i)$ $ZnS$
$(ii)$ $AgBr$

Given below are two statements.
Statement $I:$ Frenkel defects are vacancy as well as interstitial defects.
Statement $II:$ Frenkel defect leads to colour in ionic solids due to presence of $F$-centres.
Choose the most appropriate answer for the statements from the options given below:

The correct statement$(s)$ regarding defects in solids is/are:

Schottky defect is generally observed in which of the following?

Schottky defect defines imperfection in the lattice structure of a

Write a short note on non-stoichiometric defects.