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

Interstitial defect

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Vacancy defect

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Frenkel defect

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Schottky defect

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Solution

The correct option is C Frenkel defect
In a solid lattice, the cation has left a lattice site and is located at interstitial position, the lattice defect is Frenkel defect. This defect is observed in compounds having low coordination number and low radius ratio. It is also found in compounds having highly polarizing cation and an easily polarisable anion.

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