O-LevelChemistryOrganic Chemistry5070/12 · May/June 2023 · Q351 Mark

Which statement about ethane is correct?

AEach ethane molecule contains exactly seven bonds, all of which are single covalent bonds.

BEthane is a member of the homologous series of alkanes, a family of unsaturated hydrocarbons.

CThe equation for the complete combustion of ethane is C2H6 + 3O2 → 2CO2 + 3H2O.

DWhen a molecule of ethane reacts with chlorine, one hydrogen atom is replaced by a chlorine molecule.

✓ Correct answer

A: Each ethane molecule contains exactly seven bonds, all of which are single covalent bonds.

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Topic: Organic Chemistry, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, May/June 2023 Paper 1 Variant 2, question 35.

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