A-LevelChemistryGroup 2Feb/Mar 2023Paper 1 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.
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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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