JEE Main 2019 — p Block Elements (Group 13 & 14) Question with Solution
JEE Main 2019 (09 Apr Shift 2)
Question
The amorphous form of silica is:
Choose an option
Show full solutionCorrect option: B
Correct answer
Bkieselguhr
Step-by-step explanation
Kieselguhr, an amorphous form of silica is used in filtration plants.
Quartz is one of the most common minerals in the earth’s crust having a specific crystalline form.
Cristobalite is a high temperature polymorph of silica, having same chemical formula as quartz but distinct crystal structure.
Tridymite is also a high temperature polymorph of silica and occurs as hexagonal crystals.
Quartz is one of the most common minerals in the earth’s crust having a specific crystalline form.
Cristobalite is a high temperature polymorph of silica, having same chemical formula as quartz but distinct crystal structure.
Tridymite is also a high temperature polymorph of silica and occurs as hexagonal crystals.
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This is a previous-year question from JEE Main 2019, covering the p Block Elements (Group 13 & 14) chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.