11 mark
The displayed formulae of an organic compound is shown below.
What is the empirical formula of this compound?
(1)
| ☐ | A | CHBr | |
| ☐ | B | CH2Br | |
| ☐ | C | C2H4Br2 | |
| ☐ | D | CH4Br |
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Introduction (Edexcel IGCSE Chemistry: Double Science)
Exam Questions
11 mins6 questions
21 mark
The structures of four organic compounds are shown.
Which one does not show the displayed formula of the compound?
(1)
| ☐ | A | ||
| ☐ | B | ||
| ☐ | C | ||
| ☐ | D |
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3a1 mark
Ethene (C2H4) can be converted into chloroethene (C2H3Cl) in a two-stage process.
a)
The first stage is to convert ethene into 1,2-dichloroethane, C2H4Cl2
Ethene is reacted with hydrogen chloride and oxygen.
Complete the chemical equation for this reaction.
(1)
.......... C2H4 + .......... HCl + .......... O2 → .......... C2H4Cl2 + .......... H2O
3b1 mark
b)
In the second stage, 1,2-dichloroethane is converted into chloroethene.
C2H4Cl2 → C2H3Cl + HCl
This is a thermal decomposition reaction.
State what is meant by the term thermal decomposition.
(1)
3c3 marks
c)
The diagram shows the displayed formula of chloroethene.
i)
State why chloroethene is described as an unsaturated compound.
(1)
ii)
Describe a test to show that chloroethene is unsaturated.
(2)
3d1 mark
d)
Name the polymer formed from chloroethene.
(1)
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41 mark
The structures of six hydrocarbons are shown.
Which two compounds are isomers of one another?
(1)
| ☐ | A | B and D | |
| ☐ | B | A and C | |
| ☐ | C | C and F | |
| ☐ | D | C and E |
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51 mark
Which of the following is not a feature of a homologous series?
(1)
| ☐ | A | Compounds have the same functional group | |
| ☐ | B | Compounds have the same physical properties | |
| ☐ | C | Compounds have the same general formula | |
| ☐ | D | Compounds have similar chemical properties |
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61 mark
Which of the following reactions is an example of an addition reaction?
(1)
| ☐ | A | CH4 + ½O2 → CO + 2H2O | |
| ☐ | B | C2H4 + Br2 → C2H4Br2 | |
| ☐ | C | CH4 + 2O2 → CO2 + 2H2O | |
| ☐ | D | CH4 + Br2 → CH3Br + HBr |
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