Quartz is__________________? – McqOptions

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1.	Quartz is__________________?
A.	Stable form of silica upto 870°C
B.	Converted to Tridymite on firing between 870 to 1470°C
C.	Transformed to Cristobalite on heating above 1470°C
D.	All A., B. and C.
Answer» E.

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