What are metal excess defects in crystals ? How are these caused ?

What are point defects in crystals ? Describe the Schottky defects in crystals.

Schottky defect in crystals is observed when

What are non-stoichiometry defects in crystals ? Explain.

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

What are impurity defects ? Explain.

Assertion: p-type semiconductors are good conductors of electricity due to metal excees defects Reason: f-centres are created due to metal excess defects

What are vacancy and interstitial defects? How do these defects affect the density of a non-ionic crystal?

What is Frenkel defect? What type of ionic solids are likely to develop this defect? Why does the presence of Frenkel defect in a crystal not affect the density of the crystal?

Which stoichiometric defect in crystals increses the density a solid?