Quartz is – McqOptions

MCQOPTIONS

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 crystoballite on heating above 1470 C.
D.	all (a), (b) and (c).
Answer» E.

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