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

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is D Both Assertion and Reason are incorrect
Quartz is a mineral with the chemical formula SiO2, and like almost all minerals, it is a crystalline solid.
Quartz glass is an amorphous solid because it is formed by fusing the crystal and then cooling it rapidly. Crystalline solids have regular ordered arrays of components held together by uniform inter-molecular forces, whereas the components of amorphous solids are not arranged in regular arrays. Crystalline solids have a certain pattern of atoms that is repeated over and over in three dimensions.
Hence, Assertion and reason both are incorrect.
So, correct answer is option D.

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