A-LevelChemistryGroup 29701/12 · Feb/Mar 2023 · Q241 Mark
Four properties of beryllium, Be, or a beryllium compound are listed. Which property is different from the property of magnesium or the equivalent magnesium compound?
ABe reacts with O2 when heated in air; Mg does not.
BBe reacts with aqueous H2SO4 to form a metal sulfate and H2; Mg does not.
CBe(NO3)2 decomposes on heating to form a metal oxide, NO2 and O2; Mg(NO3)2 does not.
DBeCl2 reacts with water to form fumes of HCl; MgCl2 does not.
✓ Correct answer
D: BeCl2 reacts with water to form fumes of HCl; MgCl2 does not.
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