O-LevelChemistryAcids, Bases & Salts5070/21 · Oct/Nov 2021 · Q15 Marks
Choose from the following oxides to answer the questions. aluminium oxide calcium oxide iron(II) oxide magnesium oxide silicon dioxide sodium oxide sulfur dioxide Each oxide may be used once, more than once or not at all. State which oxide:
- (a)has a simple molecular structure[1]
- (b)is a coloured solid[1]
- (c)contains ions with a 3+ charge[1]
- (d)is a product of the thermal decomposition of calcium carbonate[1]
- (e)contributes to acid rain.[1]
Mark scheme
Marking points from the official mark scheme (Oct/Nov 2021). The mark or mark type is shown in brackets.
- [1] (a) sulfur dioxide
- [1] (b) iron(II) oxide
- [1] (c) aluminium oxide
- [1] (d) calcium oxide
- [1] (e) sulfur dioxide
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