A-LevelChemistryChemical periodicityOct/Nov 2018Paper 1 Q131 Mark
Which observations are made when a sample of silicon chloride, SiCl4, is added to a beaker of water?
ANo visible change is observed.
BSteamy fumes and a precipitate are both observed.
CThe appearance of a precipitate is the only observation.
DThe appearance of steamy fumes is the only observation.
✓ 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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