A-LevelChemistryGroup 2May/June 2013Paper 1 Q141 Mark
In which row of the table are all statements comparing the compounds of calcium and barium correct? [Figure 14.1]
Asolubility of calcium hydroxide: higher, solubility of barium hydroxide: lower, thermal stability of calcium carbonate: higher, thermal stability of barium carbonate: lower
Bsolubility of calcium hydroxide: higher, solubility of barium hydroxide: lower, thermal stability of calcium carbonate: lower, thermal stability of barium carbonate: higher
Csolubility of calcium hydroxide: lower, solubility of barium hydroxide: higher, thermal stability of calcium carbonate: higher, thermal stability of barium carbonate: lower
Dsolubility of calcium hydroxide: lower, solubility of barium hydroxide: higher, thermal stability of calcium carbonate: lower, thermal stability of barium carbonate: higher
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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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