Q. With respect to Graphene, which of the statements given above is not correct?:

[A] Graphene is a one-atom-thick layer of carbon atoms arranged in a heptagonal lattice

[B] It is the thinnest, most electrically and thermally conductive material in the world.

[C] Graphene could increase the lifespan of a traditional lithium-ion battery.

[D] Graphene oxide membranes are capable of forming a perfect barrier when dealing with liquids and gases.

Answer: A
Notes:

About Graphene: Graphene is a one-atom-thick layer of carbon atoms arranged in a hexagonal lattice. It is the thinnest, most electrically and thermally conductive material in the world. It is also flexible, transparent, and incredibly strong.

Application of Graphene

Biomedical: Targeted drug delivery; improved brain penetration; DIY health-testing kits and ‘smart’ implants.

Composites and Coatings: One of the simplest and most effective ways of harnessing the potential of graphene is to combine it with existing products – so-called composite materials.

Electronics: Graphene has the potential to create the next generation of electronics, currently limited to sci-fi. Faster transistors; semiconductors; bendable phones and other electronics.

Battery: Graphene could dramatically increase the lifespan of a traditional lithium-ion battery, meaning devices can be charged quicker – and hold more power for longer.

Graphene Membranes: Graphene oxide membranes are capable of forming a perfect barrier when dealing with liquids and gases. They can effectively separate organic solvent from water and remove water from a gas mixture to an exceptional level.

Sensors: Ultra-sensitive sensors made from graphene could detect minute dangerous particles, helping to protect potentially dangerous environments.

Source:  Chemistry and related aspects

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