11 mark
A molecule can have optical isomerism and geometrical isomerism.
Which of the compounds below show both?
CH3CH2CHBrCH=CHBr
CH3CBr=CBrCH3
CH3CH=CHCH2CH3
CH3CHBrCH=CH2
Did this page help you?
Isomerism: Structural Isomerism & Stereoisomerism (CIE AS Chemistry)
Exam Questions
1 hour18 questions21 mark
Which carbon atom is the chiral centre in the following molecule?
Did this page help you?
31 mark
2,2-dimethylpropane is an isomer of pentane.
What type of isomerism is shown by 2,2-dimethylpropane?
Stereoisomerism
Functional group
Cyclic
Chain
Did this page help you?
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
Did this page help you?
11 mark
Evening primrose oil has been shown to reduce high blood pressure and improve heart health. The oil is made from seeds, within which the active compound gamma-linolenic acid is found.
How many stereoisomers does gamma-linolenic acid have?
3
6
8
4
Did this page help you?
21 mark
How many structural isomers are there of tribromopropane, C3H5Br3?
4
5
6
7
Did this page help you?
31 mark
How many isomeric esters have the molecular formula C5H10O2?
4
5
9
7
Did this page help you?
41 mark
11-cis retinal, C20H28O, is found in the retina of animal eyes and is required for vision.
An 11-cis retinal molecule contains the following functional groups:
- 1 x aldehyde group
- 1 x cyclohexene ring
- 1 x aliphatic side chain
Within the side chain, there is a double bond between carbons 11 and 12.
Which letter is associated with the correct pair?
|
Arrangement of atoms around the adjacent carbons 11 and 12 |
Total number of carbon-carbon double bonds |
|
|
A |
 |
5 |
|
B |
 |
6 |
|
C |
 |
5 |
|
D |
 |
6 |
Did this page help you?
11 mark
Which of the following compounds is both chiral and acidic?
Did this page help you?
21 mark
Cholesterol is an important biological molecule produced by the liver. It is used in the production of steroid hormones and vitamin D.
How many chiral centres are there in one molecule of cholesterol?
7
8
10
5
Did this page help you?
31 mark
Including structural and stereoisomers, how many isomeric products are produced when alcoholic NaOH reacts with 2-bromobutane?
1
2
3
4
Did this page help you?
41 mark
How many isomers, including structural and stereoisomers, with the formula C5H10 have structures that involve π bonding?
3
4
5
6
Did this page help you?