O-LevelChemistryOrganic Chemistry5070/11 · May/June 2019 · Q351 Mark

When a molecule of a saturated hydrocarbon is cracked, it forms two molecules X and Y. Which row is correct?

AX: H₂, Y: CnH₂n

BX: H₂, Y: CnH₂n+2

CX: H₂O, Y: CnH₂n

DX: H₂O, Y: CnH₂n+2

✓ Correct answer

A: X: H₂, Y: CnH₂n

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

Topic: Organic Chemistry, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, May/June 2019 Paper 1 Variant 1, question 35.

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