A-LevelChemistryAtoms, molecules and stoichiometryFeb/Mar 2025Paper 1 Q81 Mark

An excess of zinc reacts with x cm³ of 2.00 mol dm⁻³ hydrochloric acid. The gas produced is dried and collected. The gas occupies 1.534 dm³ at 101000 Pa and 293 K. The gas produced behaves as an ideal gas. What is the value of x?

Q: What is the correct answer to this A-Level Chemistry question?

The correct answer is C: 63.6 cm³.

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.

A31.8 cm³

B34.7 cm³

C63.6 cm³

D69.4 cm³

✓ Correct Answer

The correct answer is C: 63.6 cm³

📋 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 2025 examination, Paper 1 Variant 2.

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