A-LevelChemistryGroup 29701/12 · May/June 2016 · 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
B: Ca dilute H₂SO₄
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