alleryWhich is NOT an allotrope of carbon?
ASilica
BGraphite
CFullerene
DDiamond
Answer & Solution
Correct answer: A. Silica
1. Allotropes are different physical forms of the same element.
2. Diamond, graphite and fullerene are all carbon-only forms.
3. Silica is silicon dioxide (SiO2), containing silicon and oxygen.
4. So silica is not an allotrope of carbon.
5. Coal, coke and charcoal are amorphous allotropes of carbon.
_Source: syllabus Science Ch 4 'Carbon and its Compounds' (byjus.com extract)_
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