0654.C11.5.02 — Describe the test to distinguish between saturated and unsaturated hydrocarbons by their reaction with aqueous bromine: past paper questions
Real questions on 0654.c11.5.02 — describe the test to distinguish between saturated and unsaturated hydrocarbons by their reaction with aqueous bromine
The newest 6 of 6 written questions. Open one to see it on the real paper.
- 0654/42 · February/March 2025 · Q7d[2]
Fig. 7.1 shows the structural formula of but-1-ene. H C H H H C C C H H H H Draw the structural formula of but-2-ene. Fig. 7.1
See it on the paper → - 0654/21 · October/November 2024 · Q26[1]
What is a general formula for unsaturated hydrocarbons?
See it on the paper → - 0654/43 · October/November 2024 · Q2b[1]
State which compound in Fig. 2.1 will decolourise aqueous bromine.
See it on the paper → - 0654/11 · May/June 2024 · Q27[1]
Which molecule reacts with aqueous bromine?
See it on the paper → - 0654/11 · October/November 2020 · Q27[1]
Which word describes ethene in this process?
See it on the paper → - 0654/12 · October/November 2019 · Q27[1]
What are process X and reagent Y?
See it on the paper →
What examiners said
Candidates generally were able to draw a formula with four carbon atoms but occasionally placed the double bond between the wrong carbon atoms. More frequently the incorrect number of bonds were given to each carbon, particularly the carbon atoms with double bonds. An easy way for candidates to check this is to count the number of bonds around each carbon atoms, which should be four.
— Examiner report, February/March 2025, 0654/42 Q7(d) (Cambridge)
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