O-LevelChemistryBonding & Structure5070/12 · Oct/Nov 2019 · Q211 Mark

Part of the Periodic Table is shown with four elements, W, X, Y and Z. These are not the elements’ actual symbols. Some pairs of these elements may react to form compounds. Which formulae are correct?

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AWX and YZ

BWY2 and WZ

CWZ and XZ

DX2Z3 and YZ

✓ Correct answer

B: WY2 and WZ

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Topic: Bonding & Structure, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, Oct/Nov 2019 Paper 1 Variant 2, question 21.

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