What is an ideal crystal ? Name the types of the defects which arise in a crystal.

What do you understand by imperfections in ionic crystals ? Name the types of imperfections which occur in ionic crystals.

If equal number of cations and anions are missing from an ionic crystal of the type MX, then the defect that arises in the crystal is called _______ defect.

What is piezoelectric crystal?

What type of stoichiometric defects are noticed in crystals?

What is dislocation in the crystals ?

Name the crystal defect which lowers the density of an ionic crystal.

Which of the following defects is present in KCl crystals ?

(a) Analysis shows that a metal oxide has the empirical formula M_(0.96)O_(1.00) . Calculate the percentage of M^(2+)andM^(3+) ions in this crystal? (b) What type of defect is found in this crystal?

What do you mean by defect in a crystal? What are point defects in a crystal?

What are non-stoichiometric defects in an ionic crystal? Explain how metal excess defects occur in an ionic crystal.