MHT CET202617 April 2026Morning ShiftChemistryp Block Elements (Group 13 & 14)Actual

Which from the following is NOT polymorphic form of silica ?

Options

ACristobalite
B- quartz
C- quartz
DAragonite

Correct answer

D. Aragonite

Step-by-step solution

Silica ( SiO₂ ) exists in various polymorphic forms such as quartz ( -quartz and -quartz), cristobalite, and tridymite. Aragonite is a naturally occurring crystalline form of calcium carbonate ( CaCO₃ ), not silica. Therefore, Aragonite is not a polymorphic form of silica. Answer: Aragonite

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