A-LevelChemistryChemical bonding9701/12 · Oct/Nov 2015 · Q31 Mark

Three substances have the physical properties shown in the table. substance melting point /°C boiling point /°C conductivity (solid) conductivity (liquid) conductivity (aqueous) U 420 907 good good insoluble V 993 1695 poor good good W -70 58 poor poor hydrolyses, resulting solution conducts well What could be the identities of U, V and W?

AU: Na, V: KCI, W: SiCl4

BU: Na, V: NaF, W: C2H5Br

CU: Zn, V: KCI, W: HCI

DU: Zn, V: NaF, W: SiCl4

✓ Correct answer

D: U: Zn, V: NaF, W: SiCl4

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Topic: Chemical bonding, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, Oct/Nov 2015 Paper 1 Variant 2, question 3.

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