A-LevelChemistryChemical bondingFeb/Mar 2024Paper 1 Q61 Mark
Aluminium chloride exists as Al₂Cl₆ molecules at room temperature. When heated to a high temperature, AlCl₃ molecules are formed. What are the arrangements of the bonding pairs of electrons around the aluminium atom in the two forms of aluminium chloride?
AAlCl₃: planar, Al₂Cl₆: planar
BAlCl₃: planar, Al₂Cl₆: tetrahedral
CAlCl₃: tetrahedral, Al₂Cl₆: tetrahedral
DAlCl₃: tetrahedral, Al₂Cl₆: octahedral
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The correct answer is B. 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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