11 mark
What is the correct formula for 1-fluro-3-methyl-2-butene?
|
A |
Structural |
CH2FCH2C(CH3)CH3 |
|
B |
Empirical |
C5H9F |
|
C |
Displayed |
|
|
D |
Skeletal |
|
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Syllabus Edition
First teaching 2023
First exams 2025
|
Formulas, Functional Groups & the Naming of Organic Compounds (CIE AS Chemistry)
Exam Questions
43 mins16 questions
21 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 identity of the functional group that is ringed in the molecule shown below?
Aldehyde
Ketone
Carboxylic acid
Alkene
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41 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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11 mark
Compound A, an organic compound with a molecular formula C6H12O2, is produced by the oxidation of compound B, molecular formula C6H14O.
Which of the following functional groups does B contain?
Carboxyl (-COOH)
Carbonyl (C=O)
Hydroxyl (-OH)
Alkyl (RCOOR’)
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21 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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31 mark
Which of the molecules shown below contains an aldehyde functional group?
CH3CH2CH2COCH3
CH3CH2OOCH3
H3CH2OCH2CH2CH2CH3
CHOCH2CHOHCH2CH3
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41 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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11 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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21 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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31 mark
What is the correct IUPAC name for the following molecule?
4-ethyl-1,2,3-trimethylpent-2-ene
3,4,5-trimethylhept-4-ene
5-ethyl-3,4-dimethylhex-3-ene
3,4,5-trimethylhept-3-ene
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41 mark
Which row is correct?
|
|
IUPAC name |
General formula |
Skeletal formula |
Structural formula |
|
A |
2-methylpropanal |
CnH2n+1O |
|
CH3CH(CH3)CHO |
|
B |
4-methylpentylamine |
CnH2n+1NH2 |
|
CH3CH2CH2CH(CH3)CH2NH2 |
|
C |
4-methylhexan-2-one |
CnH2nO |
|
CH3CH2CH(CH3)CH2COCH3 |
|
D |
ethyl propanoate |
CnH2nO2 |
|
CH3COOCH2CH2CH3 |
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