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Course: Edexcel Modular – OL (Chemistry)
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Edexcel Modular – OL (Chemistry)

1. Principles of Chemistry

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2. Inorganic Chemistry

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3. Physical Chemistry

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4. Organic Chemistry

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Quiz

Alkenes – Check yourself

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Alkenes Edexcel O Level Modular Chemistry check yourself quiz: free practice for Edexcel Modular – OL (chemistry). Work through this Alkenes Edexcel O Level Modular Chemistry check yourself quiz and get instant feedback on every answer. If you get stuck, review the 4d Alkenes — Notes lesson. More practice: Edexcel Modular – OL (chemistry) — all units. Syllabus: Pearson Edexcel International GCSEs.

  • Questions count: 9
  • Passing grade: B+
  • Time limit: 10 minutes
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1.
What is the general formula of the alkenes?
CnH2n+2
CnH2n-2
CnH2n+1
CnH2n
2.
What is seen when ethene is bubbled through bromine water?
Orange to colourless
Colourless to orange
Blue to green
No change
3.
Why are alkenes described as unsaturated?
They contain oxygen
They dissolve in water
They contain a C=C double bond
They have only single bonds
4.
What is the product of ethene and bromine?
Bromoethane
1,2-dibromoethane
Ethanol
Hydrogen bromide
5.
Which molecular formula is an alkene?
C5H10
C5H12
C4H10
C2H6
6.
What type of reaction occurs between alkenes and bromine?
Substitution
Combustion
Decomposition
Addition
7.
Which statement best describes Dibromoalkane?
Isomers differing in the position of the functional group, e.g. but-1-ene and but-2-ene.
A small molecule that can join with many others to form a polymer.
The product of adding bromine across a C=C bond, e.g. 1,2-dibromoethane.
An orange solution of bromine used to test for C=C double bonds.
8.
Which statement best describes Unsaturated?
A reaction in which atoms add across a double bond to form a single product.
Containing at least one carbon–carbon double bond.
An unsaturated hydrocarbon containing a C=C double bond, with general formula CnH2n.
A small molecule that can join with many others to form a polymer.
9.
Which statement best describes Decolourise?
To remove colour; bromine water turns from orange to colourless with alkenes.
A small molecule that can join with many others to form a polymer.
Containing at least one carbon–carbon double bond.
Joining of many alkene monomers to form a long-chain polymer with no other product.
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Part of 4. Organic Chemistry — see every lesson and quiz in this unit.
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