Question detail
Which oxide reacts with water to form a strong acid?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Properties of Period 3 elements and their oxides (A-level only)
Question
- A. P4O10
- B. Na2O
- C. MgO
- D. SiO2
Answer
P4O10
Explanation
The correct option is P4O10. P4O10 is the best answer because it directly supports the AQA A-Level Chemistry objective to explain melting point trends of Period 3 oxides. This reasoning is anchored to Period 3 oxides (A-level only) in Properties of Period 3 elements and their oxides (A-level only), and it separates Period 3 oxide from similar A-Level ideas rather than relying on a vague recall statement. Other options are weaker if they use the wrong evidence, calculation, mechanism, observation, unit, or conclusion for this subtopic.
Common mistake
Misunderstanding Bonding Types
Students often confuse the types of bonding in Period 3 oxides, thinking that all oxides have ionic bonding.
Remember that Period 3 oxides can have different types of bonding. For example, SiO2 has covalent bonding, while Na2O has ionic bonding. Review the specific bonding characteristics of each oxide. Keep the correction anchored to Period 3 oxides (A-level only) and the objective: Explain melting point trends of Period 3 oxides.
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