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1. Mention the use of amorphous silica. 2. How many sodium and chloride ions are present in the unit cell of sodium chloride? 3. Mention

1. Mention the use of amorphous silica.

2. How many sodium and chloride ions are present in the unit cell of sodium chloride?

3. Mention the conditions causing Schottky defects.

4. Mention the conditions causing Frenkel defects.

5. How many octahedral voids are there in 1 mole of an element having cubic close packed structure?

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