2025 · Q102
Which one of the following is not a property of ‘graphene’?
General KnowledgeChemistry
- AIt is the thinnest material known so far.
- BIt is almost completely transparent.
- CIt is highly conducting.
- DIt is a wide band-gap semiconductor.
Explanation
Graphene — a single layer of carbon atoms — is the thinnest material known, is almost completely transparent (about 97.7% of light passes through) and is highly conducting. It is, however, a zero-band-gap semiconductor (a semi-metal), not a wide-band-gap one. Statement D is therefore not a property of graphene.