11 markmedium
The displayed formulae of an organic compound is shown below.
What is the empirical formula of this compound?
Choose your answer
CHBr
CH2Br
C2H4Br2
CH4Br
Science (Double Award) — Chemistry
Introduction (Edexcel IGCSE Science): Exam Questions
Exam code:4SD06 questions · 11 marks · ≈ 11 min
21 markmedium
The structures of four organic compounds are shown.
Which one does not show the displayed formula of the compound?
Choose your answer
36 marksmedium
1 mark
(a)
Ethene (C2H4) can be converted into chloroethene (C2H3Cl) in a two-stage process.
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.
.......... C2H4 + .......... HCl + .......... O2 → .......... C2H4Cl2 + .......... H2O
1 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.
3 marks
(c)
The diagram shows the displayed formula of chloroethene.
i) State why chloroethene is described as an unsaturated compound.
(1 mark)
ii) Describe a test to show that chloroethene is unsaturated.
(2 marks)
1 mark
(d)
Name the polymer formed from chloroethene.
41 markmedium
The structures of six hydrocarbons are shown.
Which two compounds are isomers of one another?
Choose your answer
B and D
A and C
C and F
C and E
51 markmedium
Which of the following is not a feature of a homologous series?
Choose your answer
Compounds have the same functional group
Compounds have the same physical properties
Compounds have the same general formula
Compounds have similar chemical properties
61 markmedium
Which of the following reactions is an example of an addition reaction?
Choose your answer
CH4 + ½O2 → CO + 2H2O
C2H4 + Br2 → C2H4Br2
CH4 + 2O2 → CO2 + 2H2O
CH4 + Br2 → CH3Br + HBr