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In a solid lattice, the cation has left a lattice site and is located at an interstitial position The lattice defect is
(a)type
(b)type
(c)Schottky defect
(d)Frenkel defect

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Important Questions on Solid State
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) Frenkel defect is favored by small difference in the sizes of cation and anion.
) Frenkel defect is a metal excess defect.
) Trapping of electron in the lattice leads to formation of F-centres.
) Schottky defect has no effect on the physical property of solids.

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Given below are two statements:
Statement I : Frenkel defects are vacancy as well as interstitial defects.
Statement II : Frenkel defect leads to colour in ionic solids due to presence of F-centres.
Choose the most appropriate answer for the statements from the options given below:

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