A-LevelChemistryChemical bondingMay/June 2015Paper 1 Q321 Mark
Why does aluminium chloride, Al₂Cl₆, sublime at the relatively low temperature of 180°C? 1 The intermolecular forces between the Al₂Cl₆ molecules are weak. 2 The co-ordinate bonds between aluminium and chlorine are weak. 3 The covalent bonds between aluminium and chlorine are weak.
A1, 2 and 3 are correct
B1 and 2 only are correct
C2 and 3 only are correct
D1 only is correct
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The correct answer is D. This question tests the candidate's understanding of chemical bonding within the Chemistrysyllabus. The examiner's mark scheme requires...
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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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