A-LevelChemistryReaction kineticsOct/Nov 2009Paper 1 Q331 Mark
Why does a mixture of hydrogen gas and bromine gas react together faster at a temperature of 500 K than it does at a temperature of 400 K? 1 A higher proportion of effective collisions occurs at 500 K. 2 Hydrogen molecules and bromine molecules collide more frequently at 500 K. 3 The activation energy of the reaction is lower at 500 Κ.
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 B. 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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