EduNinjaCAIE IGCSE Chemistry Extended 11.5 Alkenes question practice helps you revise this syllabus point with the course map in view. Use this page to focus on one topic, check the style of questions available, and connect each attempt back to the knowledge area it is testing.
EduNinja keeps Chemistry practice aligned to CAIE at Extended level, so you can move from topic review into exam-style question bank work without losing the syllabus structure. Start with a small set, mark the weak steps, then return to nearby topic links when a definition, graph, calculation, or explanation needs repair.
A list of substances is shown.
> barium nitrate carbon monoxide hydrated cobalt(II) chloride copper(II) oxide anhydrous copper(II) sulfate ethane potassium iodide propene sodium bromide sulfur dioxide zinc oxide
Answer the following questions using only the substances from the list. Each substance may be used once, more than once or not at all.
Give the name of the substance that:
is an unsaturated hydrocarbon
The structures of five organic compounds, A, B, C, D and E, are shown.
Answer the questions that follow.
Each letter may be used once, more than once or not at all.
A
B
c
D
E
E
Give the letter of one compound that reacts with bromine in an addition reaction.
Five organic compounds have the following structures.
A
C
C
A
,
B
B
D
E
Which compound can be made by reacting an alkene with bromine?
Some symbol equations and word equations, A to J, are shown.
A
B
C ethane + chlorine → chloroethane + hydrogen chloride
D
E ethene + steam → ethanol
F chlorine + aqueous potassium iodide → iodine + aqueous potassium chloride
G
H ethanoic acid + ethanol → ethyl ethanoate + water
I calcium carbonate → calcium oxide + carbon dioxide
J
Use the equations to answer the questions that follow.
Each equation may be used once, more than once, or not at all.
Give the letter, A to J, for the equation that represents:
cracking. [1]
[Total: 6]
Some symbol equations and word equations, A to J, are shown.
A
B
C methane + chlorine → chloromethane + hydrogen chloride
D propene + bromine → 1,2-dibromopropane
E
F chlorine + aqueous potassium bromide → bromine + aqueous potassium chloride
G methane + oxygen → carbon monoxide + water
H
I hydrogen + oxygen → water
J
Use the equations to answer the questions that follow.
Each equation may be used once, more than once, or not at all.
Give the letter, A to J, for the equation which represents:
an addition reaction [1]
State one gas which:
is unsaturated
Ethene is an unsaturated hydrocarbon.
Which description of the bonding in ethene is correct?
All atoms in the molecule have a share of eight electrons.
Each carbon atom shares two of its electrons with hydrogen atoms and two of its electrons with a carbon atom.
Each carbon atom shares two of its electrons with hydrogen atoms and one of its electrons with a carbon atom.
The two carbon atoms share a total of six electrons with other atoms.
Cyclopropane is a colourless gas.
Cyclopropane reacts with bromine at room temperature. The chemical equation for the reaction is shown.
What colour change, if any, would you see when cyclopropane is bubbled into aqueous bromine?
initial colour
final colour
Fluorine is a Group VII element. Fluorine forms compounds with metals and non-metals.
Tetrafluoroethene is an unsaturated compound with the formula . Tetrafluoroethene is the monomer used to make the polymer poly(tetrafluoroethene).
Describe a test to show that tetrafluoroethene is unsaturated.
test
observations
The structures of six organic compounds are shown.
A
B
C
D
E
F
Explain why B is an unsaturated hydrocarbon.