Question:
Which from the following is NOT polymorphic form of silica ?
Which from the following is NOT polymorphic form of silica ?
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Silica forms quartz, tridymite and cristobalite; aragonite is calcium carbonate.
Updated On: Oct 1, 2026
- Cristobalite
- \(α\) - quartz
- \(β\) - quartz
- Aragonite
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Verified By Collegedunia
The Correct Option is D
Solution and Explanation
Step 1: Understanding the Concept
Silica (SiO\(_2\)) exists in several crystalline forms, called polymorphs: quartz (\(\alpha\) and \(\beta\)), tridymite and cristobalite.
Step 2: Detailed Explanation
Cristobalite, \(\alpha\)-quartz and \(\beta\)-quartz are all forms of SiO\(_2\).
Aragonite is a form of calcium carbonate, CaCO\(_3\), and has nothing to do with silica.
So it is the one that is not a polymorph of silica.
Final Answer:
Aragonite is not a form of silica, so the answer is option (D). \[ \boxed{\text{Aragonite (D)}} \]
Silica (SiO\(_2\)) exists in several crystalline forms, called polymorphs: quartz (\(\alpha\) and \(\beta\)), tridymite and cristobalite.
Step 2: Detailed Explanation
Cristobalite, \(\alpha\)-quartz and \(\beta\)-quartz are all forms of SiO\(_2\).
Aragonite is a form of calcium carbonate, CaCO\(_3\), and has nothing to do with silica.
So it is the one that is not a polymorph of silica.
Final Answer:
Aragonite is not a form of silica, so the answer is option (D). \[ \boxed{\text{Aragonite (D)}} \]
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