O-LevelChemistryBonding & Structure5070/12 · Oct/Nov 2023 · Q151 Mark

Physical changes and chemical changes can occur in substances. Which process describes a chemical change?

Acovalent bonds in methane molecules are broken

Bintermolecular attractions between water molecules are broken

Cionic bonds in a sodium chloride lattice are broken

Dthe manufacture of brass from copper and zinc

✓ Correct answer

A: covalent bonds in methane molecules are broken

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Topic: Bonding & Structure, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, Oct/Nov 2023 Paper 1 Variant 2, question 15.

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