A-LevelChemistryAtoms, molecules and stoichiometryMay/June 2020Paper 1 Q61 Mark
In this question you should assume air contains 21% oxygen. What is the minimum volume of air required to ensure complete combustion of 10 cm³ of butane gas, under room conditions?
A14 cm³
B27 cm³
C65 cm³
D310 cm³
✓ Correct Answer
The correct answer is D. This question tests the candidate's understanding of atoms, molecules and stoichiometry within the Chemistrysyllabus. The examiner's mark scheme requires...
📋 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...
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