A-LevelChemistryGroup 29701/12 · May/June 2024 · Q181 Mark

W is a solid that reacts with water to produce an alkaline solution. The addition of two drops of dilute H2SO4 to this alkaline solution produces a white precipitate. What could be the identity of solid W?

Amagnesium hydroxide

Bmagnesium oxide

Cbarium oxide

Dphosphorus oxide

✓ Correct answer

C: barium oxide

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