Q.

In a solid lattice the cation has left a lattice site and is located at an interstitial position. The lattice defect is known is

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a

Schottky defect

b

Valency defect

c

Interstitial defect

d

Frenkel defect

answer is C.

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Detailed Solution

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The Frenkel defect is a lattice defect where the cation has left a lattice site and is situated in an interstitial position. Compounds with a low coordination number and a low radius ratio exhibit this defect. Additionally, it can be found in compounds with a polar anion and a highly polarising cation.

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