A-LevelChemistryChemical periodicityOct/Nov 2021Paper 1 Q351 Mark
The following statements compare some properties of the oxides and chlorides of sodium and silicon. Which statements are correct? 1 The melting point of SiCl4 is higher than the melting point of SiO2. 2 SiCl4 reacts with water, NaCl does not. 3 The melting point of SiCl4 is lower than the melting point of NaCl.
A1, 2 and 3 are correct
B1 and 2 only are correct
C2 and 3 only are correct
D1 only is correct
✓ Correct Answer
The correct answer is C. 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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