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  4. Assertion: Quartz glass is crystalline solid and quartz is an amorphous solid. Reason: Quartz glass has long range order.

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Q. Assertion : Quartz glass is crystalline solid and quartz is an amorphous solid.
Reason : Quartz glass has long range order.

The Solid State

Solution:

The structure of quartz is crystalline and that of quartz glass is amorphous. The two structures are almost identical yet in case of amorphous quartz glass, there is no long range order.