a. Quartz
b. Tridymite
c. Cristobalite
d. Kieselguhr
Ans. d
Explanation : The amorphous form of silica is kieselguhr.
a. Quartz
b. Tridymite
c. Cristobalite
d. Kieselguhr
Ans. d
Explanation : The amorphous form of silica is kieselguhr.
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