O-LevelChemistryBonding & Structure5070/12 · May/June 2022 · Q101 Mark

A molecule of tetrafluorosilane, SiF₄, is shown in the dot-and-cross diagram. Only the outer shell electrons are shown. Which statement is correct?

This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.

AEach molecule of SiF₄ has exactly 16 pairs of electrons.

BIn SiF₄ both the silicon and the fluorine have the same electronic configuration as neon.

CMolten SiF₄ will conduct electricity.

DSiF₄ has a low melting point.

✓ Correct answer

D: SiF₄ has a low melting point.

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Topic: Bonding & Structure, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, May/June 2022 Paper 1 Variant 2, question 10.

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