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IB Chemistry SL 3.2.3 Homologous Series Questions

Use real exam questions to recognise homologous series, apply general formulas and verify that successive members differ by CH₂.

Syllabus
First assessment 2025
Course
Chemistry SL
Level
SL

Exam points

  • Recognise a homologous series from a shared functional group, general formula and similar chemical properties.
  • Apply the correct general formula to identify or calculate a member of an alkane, alkene, alkyne, alcohol or other listed series.
  • Verify successive-member relationships by checking the CH₂ difference and the gradual change in physical properties.

Learn this topic

Study 3.2.3—Homologous series conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB Chemistry SL 3.2.3 Homologous Series Questions question 1

[Maximum number: 1]

Alkenes, such as A (shown below), are important intermediates in the petrochemical industry because they undergo addition reactions to produce a wide variety of products, such as the conversion shown below.

Figure for Question IB Chemistry SL 3.2.3 Homologous Series Questions question 1 — IB Chemistry SL

In the gas phase, A reacts with hydrogen to form D.

Figure for Question IB Chemistry SL 3.2.3 Homologous Series Questions question 1 — IB Chemistry SL

State the homologous series to which D belongs.

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