A-LevelChemistryGroup 2Oct/Nov 2023Paper 1 Q231 Mark
Q is a mixture of two compounds of Group 2 elements. Q undergoes thermal decomposition to produce a white solid and only two gaseous products. One of the gaseous products relights a glowing splint. What could be the components of mixture Q?
AMgCl2 and CaCO3
BMgCO3 and Ca(NO3)2
CMg(NO3)2 and Ca(NO3)2
DMgO and CaO
✓ Correct Answer
The correct answer is C. This question tests the candidate's understanding of group 2 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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