A-LevelChemistryGroup 2Feb/Mar 2017Paper 1 Q141 Mark
Why does barium react more rapidly with cold water than magnesium does?
ABarium atoms are larger and form ions more easily than magnesium atoms.
BBarium floats on the surface of the water but magnesium sinks in the water.
CBarium hydroxide is less soluble than magnesium hydroxide.
DThe sum of the 1st and 2nd ionisation energies of barium is more than that for magnesium.
✓ Correct Answer
The correct answer is A. 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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