A-LevelChemistryReaction kineticsOct/Nov 2014Paper 1 Q11 Mark
Which solid-line curve most accurately represents the distribution of molecular energies in a gas at 500K if the dotted-line curve represents the corresponding distribution for the same gas at 300 K?
A[Diagram option: molecular energy distribution where the 500K solid curve is shifted to higher energy and is broader and lower than the 300K dotted curve.]
B[Diagram option: molecular energy distribution where the 500K solid curve is shifted to lower energy and is narrower and taller than the 300K dotted curve.]
C[Diagram option: molecular energy distribution where both 300K dotted and 500K solid curves peak at the same energy, but the 500K curve is broader.]
D[Diagram option: molecular energy distribution where the 500K solid curve is shifted to higher energy and is taller and narrower than the 300K dotted curve.]
✓ Correct Answer
The correct answer is A. This question tests the candidate's understanding of reaction kinetics 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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