A-LevelChemistryChemical bonding9701/12 · Feb/Mar 2022 · Q191 Mark

The table shows the melting points of SiO₂ and P₄O₆. [Figure 19.1] Which statement explains the difference between the melting points of SiO₂ and P₄O₆?

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AThe bonding of the oxides changes from ionic to covalent.

BThe metallic character of the elements decreases across Period 3.

CThe oxidation number of the element increases from Si to P.

DThe structure changes from giant molecular to simple molecular.

✓ Correct answer

D: The structure changes from giant molecular to simple molecular.

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Topic: Chemical bonding, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, Feb/Mar 2022 Paper 1 Variant 2, question 19.

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