A-LevelChemistryGroup 2Feb/Mar 2022Paper 1 Q211 Mark
Which row gives correct comparisons between the solubilities of calcium hydroxide and barium hydroxide and the thermal stabilities of calcium carbonate and barium carbonate? [Figure 21.1]
Ahigher, lower, higher, lower
Bhigher, lower, lower, higher
Clower, higher, higher, lower
Dlower, higher, lower, higher
✓ Correct Answer
The correct answer is D. This question tests the candidate's understanding of group 2 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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