A-LevelChemistryGroup 2May/June 2014Paper 1 Q151 Mark
Which statement about the oxides and hydroxides of the Group II elements Mg, Ca, Sr and Ba is correct?
AEach of the oxides reacts readily with water to form a solution of pH 12 or above.
BMagnesium oxide is used as a furnace lining because it has a giant molecular structure and hence a high melting point.
CThe hydroxides are produced directly by the thermal decomposition of the corresponding nitrates.
DThe solubility of the hydroxides increases from Mg(OH)2 to Ba(OH)2.
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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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