A-LevelChemistryReaction kineticsMay/June 2012Paper 1 Q11 Mark
The molecular energy distribution curve represents the variation in energy of the molecules of a gas at room temperature. [Figure 1.1] Which curve applies for the same gas at a lower temperature?
A[Diagram of distribution curve: peak is higher and slightly shifted left, narrower]
B[Diagram of distribution curve: peak is lower and shifted left, wider]
C[Diagram of distribution curve: peak is highest and shifted furthest left, narrowest]
D[Diagram of distribution curve: peak is shifted right and lower, wider]
✓ Correct Answer
The correct answer is C. 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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