Assertion: In frekel defect in an ionic crystal, an ion is dispalced from its normal site to an interstitial site.
Reason: There is both a vacancy and an intersitial ion.

Which defect in an ionic crystal is a combination of a vacancy defect and an interstitial defect?

In crystalline solid, atoms, ions or molecules are held in an orderly array. But some point defect is observed in a crystal, when a vacancy is created by an atom or ion dislocated from its normal position to an interstitial site. What is the defect called?

In a crystal some ions are missing from normal sites This is an example of:

In a crystal some iron are missing from normal sites. This is an example of

In a crystal, some ions are missing from normal sites. This is an example of :

Assertion : In ZnO, the excess Zn^(2+) ions are present in interstitial sites. Reason : Metal excess crystals have either missing cation or anion in interstitial site.

In a crystal some of the ions are missing from their normal sites. This is an example of

F- centres in an ionic crystal are a. lattice sites containing electrones b. interstitial sites containing electrons c. lattice cites that are vacant