Which of these statements are correct?

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Deviations from ideal arrangement in entire rows of lattice points are called point defects

Deviations from ideal arrangement around a point or an atom in crystalline substance are called line defects

The irregularities in the crystal structure are called crystal defects

F-centre gives lilac colour to KCI crystal

answer is C.

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Detailed Solution

Irregularities or deviations from ideal arrangement in the entire rows of lattice points are called line defects, whereas deviations or irregularities from ideal arrangement around a point or an atom in crystalline substance are called point defects. All these irregularities are called crystal defects.F-centre are responsible for the lilac colour of KCl.

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