Q.

Schottky defect in crystals is observed when

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a

 Unequal number of cations and anions are missing from the lattice

b

Density of the crystal is increased

c

Equal number of cations and anions are missing from the lattice

d

An ion leaves its normal site and occupies an interstitial site

answer is D.

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Detailed Solution

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Schottky defect in crystals is observed when equal numbers of cations and anions are missing from the lattice. It is important that an equal number of cations and anions are missing, otherwise the electrical neutrality of the crystal will get affected

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