A-LevelChemistryChemical periodicity9701/12 · May/June 2014 · Q131 Mark

X and Y are oxides of different Period 3 elements. If one mole of Y is added to water, the solution formed is neutralised by exactly one mole of X. What could be the identities of X and Y? [Figure 13.1]

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.

AX: Al2O3, Y: P4O10

BX: Al2O3, Y: SO3

CX: Na2O, Y: P4O10

DX: Na2O, Y: SO3

✓ Correct answer

D: X: Na2O, Y: SO3

Oracle Prep sorts past-paper questions by topic, so you can drill Chemical periodicity and see which topics are most likely to come up next.

Topic: Chemical periodicity, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, May/June 2014 Paper 1 Variant 2, question 13.

Questions and mark schemes are from past examination papers and remain the copyright of the exam board. How Oracle Prep builds its content