SELECT * FROM question_mgmt as q WHERE id=1734 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=3 AND subId=9 AND chapterId=56 and ex_no='2' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 12th chemistry The Solid State what makes a glass different from a solid such as

Question:

What makes a glass different from a solid such as quartz? Under what conditions could quartz be converted into glass?

Answer:

The first difference between them is that quartz contains almost 99% silicon dioxide while glass contains only 80% silicon dioxide.

Secondly, glass has a irregular molecular structure while quartz has a symmetrical molecular structure.

Thirdly, quartz can withstand high temperature and pressure, whereas glass is unstable at high temperature and pressure.

Fourthly, glass act as an insulator and do not conduct electricity, while quartz conducts electricity.

For the conversion of quartz into glass, the quartz has to be melted and cooled rapidly.


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