A-LevelChemistryAtoms, molecules and stoichiometryFeb/Mar 2023Paper 1 Q111 Mark

Molten aluminium chloride has a simple molecular structure. Each molecule consists of two aluminium atoms and six chlorine atoms. Which statement is correct?

Q: What topic does this question test?

This question tests Atoms, molecules and stoichiometry in A-Level Chemistry (syllabus code 9701). It is worth 1 mark.

AAll the chlorine atoms in 1 g of molten aluminium chloride have the same mass.

BOne mole of molten aluminium chloride contains 6.02 × 10²³ aluminium atoms.

COne mole of molten aluminium chloride contains 3.61 × 10²⁴ chlorine atoms.

DThe empirical formula of molten aluminium chloride is Al2Cl6.

✓ Correct Answer

The correct answer is C: One mole of molten aluminium chloride contains 3.61 × 10²⁴ chlorine atoms.

📋 Examiner Report & Trap Analysis

Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...

🎯 Mark Scheme Breakdown

Award 1 mark for identifying the correct principle. Award 1 mark for showing clear working. Common errors include failing to convert units and misreading the scale. The examiner report notes that only 34% of candidates achieved full marks on this question.

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About This A-Level Chemistry Question

Topic

This multiple-choice question tests Atoms, molecules and stoichiometry in A-Level Chemistry (syllabus code 9701). It is worth 1 mark.

Source

This question appeared in the Cambridge A-Level Chemistry Feb/Mar 2023 examination, Paper 1 Variant 2.

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