Relevant Competitive Tests:
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.Correct Answer
Correct Option: D. All A., B. and C.
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