A-LevelChemistryGroup 29701/12 · May/June 2014 · 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.
✓ Correct answer
D: The solubility of the hydroxides increases from Mg(OH)2 to Ba(OH)2.
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