UPSC NDA II 2018 General Ability Solved Paper

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Question : 81 of 150

Marks: +1, -0

Which one of the following statements is not correct?

[NDA II 2018]

All carbons in diamond arc linked by carbon-carbon single bond.
Graphite is layered structure in which layers are held together by weak van der Waals forces,
Graphite layers are formed by hexagonal rings of carbon atoms.
Graphite layers are held together by carbon carbon single bond.

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