Skip to main content
O-LevelChemistryOrganic Chemistry5070/11 · Oct/Nov 2020 · Q351 Mark

Which statements about alkenes are correct? 1 They have the general formula of CnH2n-. 2 They undergo addition reactions with steam. 3 They burn in air to form carbon dioxide and water.

A1 and 2 only
B1 and 3 only
C2 and 3 only
D1, 2 and 3

✓ Correct answer

D: 1, 2 and 3

Practise more questions on this topic

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.

Sign up free →

About this question

Topic
Organic Chemistry, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source
O-Level Chemistry, Oct/Nov 2020 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

Related Chemistry questions

© 2026 Oracle Prep