A-LevelChemistryGroup 2May/June 2016Paper 1 Q161 Mark
A solid, T, was placed in an excess of the liquid U. A colourless gas was given off and a white precipitate was seen. The precipitate was not T. What could be the identities of T and U? T U BaCO₃ H₂O Ca dilute H₂SO₄ Mg dilute H₂SO₄ SrCO₃ dilute HCl
ABaCO₃ H₂O
BCa dilute H₂SO₄
CMg dilute H₂SO₄
DSrCO₃ dilute HCl
✓ Correct Answer
The correct answer is B. 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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