11 mark
2,2-dimethylpropane is an isomer of pentane.
What type of isomerism is shown by 2,2-dimethylpropane?
Stereoisomerism
Functional group
Cyclic
Chain
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Introduction to Organic Chemistry (AQA A Level Chemistry)
Exam Questions
4 hours45 questions21 mark
Which of the following molecules are hydrocarbons?
| 1 | 2 | 3 | 4 |
A | ✓ | ✓ | ⨯ | ⨯ |
B | ✓ | ✓ | ✓ | ✓ |
C | ✓ | ✓ | ✓ | ⨯ |
D | ⨯ | ⨯ | ⨯ | ✓ |
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31 mark
What is the correct formula for 1-fluoro-3-methylbut-2-ene?
A | Structural | CH2FCH2C(CH3)CH3 |
B | Displayed |  |
C | Empirical | C5H9F |
D | Skeletal |  |
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41 mark
What is the correct meaning of the term structural isomer?
A compound that contains a different molecular formula and the atoms are arranged differently in space
A compound that contains the same molecular formula but the atoms are arranged differently in space
A compound with the same empirical formula but different structural formula
A compound with the same molecular formula but different structural formula
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51 mark
Which of the following is the displayed formula for ethylamine?
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61 mark
Which of the hydrocarbons shown below does not belong in the same homologous series as the other compounds?
C9H20
C8H16
C7H16
C8H18
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71 mark
What is the identity of the functional group that is ringed in the molecule shown below?
Aldehyde
Ketone
Carboxylic acid
Alkene
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81 mark
What is the IUPAC name of the following molecule?
2-chloro-3-methylpentane
3-methyl-4-chloropentane
2-ethyl-3-chlorobutane
2-chloro-3-ethylbutane
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91 mark
Chlorine gas reacts explosively with hydrogen in sunlight.
Which of the following represents the initiation step of the reaction?
H● + Cl●→ HCl
H● + Cl2 → HCl + Cl●
Cl● + H2 → HCl + H●
Cl2 → Cl● + Cl●
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101 mark
What is the correct IUPAC name for the stereoisomer below?
E-1,2-dichloroethene
Z-1,2-chloroethene
E-1,2-dichloroethane
Z-1,2-dichloroethene
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11 mark
Xylitol is an artificial sweetener used in toothpastes and chewing gum to improve their taste without impairing dental hygiene.
Which functional groups could be produced if xylitol is oxidised under suitable conditions?
| Alkene | Aldehyde | Carboxylic acid | Ketone |
A | ✓ | ⨯ | ⨯ | ⨯ |
B | ⨯ | ✓ | ⨯ | ⨯ |
C | ⨯ | ✓ | ⨯ | ✓ |
D | ⨯ | ✓ | ✓ | ✓ |
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21 mark
How many structural isomers are there of tribromopropane, C3H5Br3?
4
5
6
7
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31 mark
Which features about the members of a homologous series are correct?
| All members have the same general formula | The members have similar chemical properties | The members show a gradual change in physical properties |
A | ✓ | ✓ | ✓ |
B | ✓ | ⨯ | ✓ |
C | ⨯ | ✓ | ✓ |
D | ✓ | ✓ | ⨯ |
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41 mark
Octane is a component of petrol or gasoline. Which of the following molecules could be an isomer of octane?
CH3CH2CHCHCHCH2(CH3)2
CH3(CH2)5CH3
(CH3)2CHCH(CH2)2(CH3)2
CH3CHCHCH(CH2)2(CH3)2
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51 mark
What is the name of the following molecule?
2,3,3-tetramethylpentane
3,3,5-trimethylhexane
2,4,4,4-trimethylethylbutane
2,4,4-trimethylhexane
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61 mark
How many branched-chain isomers are there which have the molecular formula C5H12?
3
4
5
6
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71 mark
Which statements are correct for the organic molecule below?
| IUPAC name is hex-4-ene | The empirical formula is CH2 | It is an isomer of cyclohexane |
A | ✓ | ✓ | ✓ |
B | ✓ | ⨯ | ✓ |
C | ⨯ | ✓ | ✓ |
D | ✓ | ✓ | ⨯ |
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81 mark
Which of the molecules shown below contains an aldehyde functional group?
CH3CH2CH2COCH3
CH3CH2OOCH3
H3CH2OCH2CH2CH2CH3
CHOCH2CHOHCH2CH3
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91 mark
Which of the formulas below shows a tertiary halogenoalkane?
CH3CH2CH2I
C(CH3)3Cl
CH3CH2CH(CH3)Br
CH3CHClCH2CH3
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101 mark
What is the correct name for this isomer?
Z-1,2-dibromopropene
Z-1,2-dibromoethene
E-1,2-dibromoethane
Z-1,4-dibromoethene
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11 mark
What is the systematic name of the compound below?
E-2-bromobut-2-ene
Z-2-bromobut-2-ene
E-1,2-dimethyl-1-bromoethene
Z-1,2-dimethyl-1-bromoethene
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21 mark
Limonene is found in the peel of citrus fruits.
What is the correct empirical and molecular formula of limonene?
| Empirical Formula | Molecular formula |
A | C9H13 | C9H13 |
B | C5H9 | C10H18 |
C | C10H8 | C10H16 |
D | C5H8 | C10H16 |
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31 mark
How many structural isomers of C6H14O are tertiary alcohols?
2
3
4
5
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41 mark
How many isomers with the formula C5H10, including structural and stereoisomers, contain π bonds (double bonds)?
3
4
5
6
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51 mark
Which compound is unsaturated, alicyclic and contains an alkyl group?
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61 mark
What is the correct structural formula for 2,2-dibromo-4-methylhexane?
CH3CHBrCBr(CH3)CH2CH2CH3
CH3CBr2CH(CH3)CH2CH2CH3
CH3CHBrCH(CH3)CHBrCH2CH3
CH3CBr2CH2CH(CH3)CH2CH3
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71 mark
Which of the following are functional group isomers of one another?
| CH3CH2CH2COOH | CH3CH(OH)CH2CH2CH3 | HCOOCH2CH2CH3 | CH3CH2CH(OH)CH2CH3 |
A | ⨯ | ✓ | ⨯ | ✓ |
B | ✓ | ⨯ | ✓ | ⨯ |
C | ⨯ | ✓ | ✓ | ⨯ |
D | ✓ | ✓ | ⨯ | ⨯ |
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81 mark
What types of isomerism can the following molecule show?
| Branch-chain | Positional | Functional group |
A | ✓ | ✓ | ⨯ |
B | ⨯ | ⨯ | ✓ |
C | ⨯ | ✓ | ✓ |
D | ✓ | ✓ | ✓ |
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91 mark
Which of the following are functional group isomers of each other?
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101 mark
Z-Citral, shown in the diagram, is used in the synthesis of vitamin A.
Which of the double bonds, labelled A, B, C or D, is responsible for the letter Z in the name?
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