A-LevelChemistryChemical bonding9701/12 · Feb/Mar 2022 · Q71 Mark

Elements X, Y and Z are all in the first two periods of the Periodic Table. Their Pauling electronegativity values, EN, are shown. [Figure 7.1] Substances exist with formulae XZ, YZ and Z₂. Which row puts these substances in order of increasing melting point? [Figure 7.2]

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AXZ, YZ, Z₂

BXZ, Z₂, YZ

CZ₂, YZ, XZ

DZ₂, XZ, YZ

✓ Correct answer

C: Z₂, YZ, XZ

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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 7.

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