O-LevelChemistryBonding & Structure5070/11 · May/June 2016 · Q71 Mark

Which statement shows that graphite and diamond are different forms of the element carbon?

ABoth graphite and diamond have giant molecular structures.

BComplete combustion of equal masses of graphite and diamond produces equal masses of carbon dioxide and no other products.

CGraphite and diamond have different melting points.

DGraphite conducts electricity, whereas diamond does not.

✓ Correct answer

B: Complete combustion of equal masses of graphite and diamond produces equal masses of carbon dioxide and no other products.

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Topic: Bonding & Structure, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, May/June 2016 Paper 1 Variant 1, question 7.

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