A-LevelChemistryChemical periodicityOct/Nov 2023Paper 1 Q201 Mark
Four mixtures are added to four separate 50 cm³ samples of water and stirred. Which mixture results in a solution with the highest pH?
A1.0 g of aluminium oxide and 1.0 g of aluminium chloride
B1.0 g of magnesium oxide and 1.0 g of magnesium chloride
C1.0 g of phosphorus oxide and 1.0 g of phosphorus chloride
D1.0 g of silicon dioxide and 1.0 g of silicon chloride
✓ Correct Answer
The correct answer is B. This question tests the candidate's understanding of chemical periodicity 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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