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Question

The amorphous form of silica is:

A
Quartz
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B
Kieselguhr
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C
Cristobalite
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D
Tridymite
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Solution

The correct option is B Kieselguhr
Quartz is the purest crystalline form of silica. It shows piezoelectric effect.
Kieselguhr is the amorphous form of silica. It is heat resistant and has been used as an insulator and also as abrasive.
Cristobalite and Tridymite were the crystalline polymorph of silica formed at high temperatures.

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