| Date | May 2011 | Marks available | 1 | Reference code | 11M.1.hl.TZ2.39 |
| Level | HL | Paper | 1 | Time zone | TZ2 |
| Command term | Deduce | Question number | 39 | Adapted from | N/A |
Question
Which compound is optically active?
Markscheme
B
Examiners report
Several respondents suggested that it would have been better if atomic labels were given in the 3D diagrams in this question which is a fair comment.
Syllabus sections
Show 72 related questions
- 17N.2.hl.TZ0.8a.v: Draw three-dimensional representations of the two enantiomers.
- 17N.2.hl.TZ0.8a.iv: Deduce, giving a reason, which of the two compounds can show optical activity.
- 17N.1.hl.TZ0.37: What is the number of optical isomers of isoleucine? A. 0 B. 2 C. 4 D. 8
- 17M.2.hl.TZ2.7d: Below are two isomers, A and B, with the molecular formula C4H9Br. Explain the mechanism...
- 17M.1.hl.TZ2.35: Which pair of isomers always shows optical activity? A. Cis-trans B. ...
- 17M.3.hl.TZ1.28b: A mixture of enantiomers shows optical rotation. Suggest a conclusion you can draw from this...
- 17M.3.hl.TZ1.28a: Describe what happens to plane-polarized light when it passes through a solution of...
- 17M.3.hl.TZ1.17: Vision is dependent on retinol (vitamin A) present in retina cells. Retinol is oxidized to...
- 17M.1.hl.TZ1.37: Which molecule is chiral? A. 2-chlorobutane B. 2,2-dichloropentane C. ...
- 16N.2.hl.TZ0.6b: When one enantiomer undergoes substitution by alkaline hydrolysis approximately 75 % of the...
- 16N.2.hl.TZ0.6a: Draw the three-dimensional shape of each enantiomer of this isomer showing their spatial...
- 16N.1.hl.TZ0.37: Which statement is correct for a pair of enantiomers under the same conditions? A. A...
- 16M.3.hl.TZ0.26c: Oseltamivir is a chiral compound. (i) Identify an apparatus that can be used to distinguish...
- 16M.3.hl.TZ0.10c: (i) Serine is a chiral amino acid. Draw both enantiomers of serine. (ii) State the...
- 16M.1.hl.TZ0.37: ...
- 15M.1.hl.TZ1.38: Which pair are geometric isomers?
- 15M.1.hl.TZ2.39: How many four-membered ring isomers are there of dichlorocyclobutane,...
- 15M.2.hl.TZ1.7d.i: 2-bromobutane exists as optical isomers. State the essential feature of optical isomers.
- 15M.2.hl.TZ1.7d.ii: 2-bromobutane exists as optical isomers. Outline how a polarimeter can distinguish between...
- 15M.2.hl.TZ2.10h.i: Define the term stereoisomers.
- 15M.2.hl.TZ2.10h.ii: State the conditions needed for a compound to show cis-trans.
- 15M.2.hl.TZ2.10h.iii: Draw the structures of the two geometrical isomers of but-2-ene, clearly identifying each as...
- 14M.1.hl.TZ2.38: Which compound can exist as stereoisomers? A. 1,2-dichloroethane B. ...
- 14M.1.hl.TZ2.37: What does a polarimeter measure? A. Colour of reaction mixture B. Polarity of a...
- 14M.1.hl.TZ1.39: Which statement about isomerism is correct? A. But-1-ene and but-2-ene are geometrical...
- 14M.2.hl.TZ1.8e: (i) Outline the meaning of the term stereoisomers. (ii) Draw the structures...
- 14N.1.hl.TZ0.39: Which type(s) of stereoisomerism, if any, is/are present in the molecule CH2=CHCHBrCH3? A. ...
- 13N.2.hl.TZ0.8c.i: State what is meant by optical activity.
- 13N.2.hl.TZ0.8c.ii: State what optical activity indicates about the structure of the molecule.
- 13N.2.hl.TZ0.8c.iii: Optical activity can be detected using a polarimeter. Explain how this works.
- 13N.2.hl.TZ0.8c.iv: Deduce the structural formula of X.
- 13M.1.hl.TZ1.38: Which molecule exhibits optical isomerism? A. 3-chloropentane B. ...
- 13M.1.hl.TZ1.34: What is the name of the following compound applying IUPAC rules? A. ...
- 13M.2.hl.TZ1.9a.iv: State what is meant by the term stereoisomers.
- 13M.2.hl.TZ1.9a.v: Explain the existence of geometrical isomerism in but-2-ene.
- 13M.1.hl.TZ2.39: Which structure is a geometric isomer of cis-1,2-dichlorocyclobutane?
- 13M.2.hl.TZ2.8a: Describe what is meant by the term stereoisomers.
- 13M.2.hl.TZ2.8e.iii: State the instrument used to distinguish between each of the two enantiomers, and how they...
- 13M.2.hl.TZ2.8e.iv: Compare the physical and chemical properties of enantiomers. Physical...
- 12N.2.hl.TZ0.7a.i: State what is meant by the term stereoisomers.
- 12N.2.hl.TZ0.7c.iii: 2-bromobutane is optically active. Draw the two enantiomers of 2-bromobutane and compare...
- 10N.1.hl.TZ0.39: Which statement about stereoisomers is correct? A. 1,2-dichloroethane has two geometrical...
- 10N.2.hl.TZ0.2b: But-2-ene shows geometrical isomerism. Draw the structural formula and state the name of the...
- 10N.2.hl.TZ0.5f: There are four structural isomers with the molecular formula...
- 10N.3.hl.TZ0.F5a: State its name and, by means of a diagram, predict its structure.
- 10N.3.hl.TZ0.F5b: Describe the structural feature of the carvone molecule that allows it to exist as optical...
- 09N.1.hl.TZ0.37: Which compound could rotate the plane of polarization of polarized light? A. ...
- 09N.2.hl.TZ0.9a.i: Draw the structural formulas of the two geometrical isomers of 1-chloro-but-2-ene.
- 09N.2.hl.TZ0.9a.ii: Explain why 1-chloro-but-2-ene shows geometrical isomerism.
- 09N.2.hl.TZ0.9a.iii: Draw the structural formula of one isomer of...
- 09N.3.hl.TZ0.F3a: Identify the chiral centre in this enantiomer with an asterisk, *.
- 09N.3.hl.TZ0.F3b: The \(( + )d\)-enantiomer has the characteristic smell of oranges and the \(( -...
- 09N.3.hl.TZ0.F3c: The R, S notation is also used. The \(( + )d\)-enantiomer is often described as R-limonene...
- 10M.2.hl.TZ1.7e: Identify the isomer of C4H9Br that can exist as stereoisomers. Outline how a polarimeter will...
- 10M.2.hl.TZ2.5: (a) Describe what is meant by the term stereoisomers. (b) 1,3-dichlorocyclobutane...
- 09M.1.hl.TZ1.39: Which compound can exist as stereoisomers? A. ...
- 09M.2.hl.TZ1.9b.i: Draw the structures of the two mirror images of the isomer that can exhibit optical isomerism.
- 09M.2.hl.TZ1.9b.ii: Describe how the two optical isomers can be distinguished practically using plane-polarized...
- 09M.1.hl.TZ2.39: Which statement is correct about the enantiomers of a chiral compound? A. Their physical...
- 09M.2.hl.TZ2.8d.i: Describe geometrical isomerism.
- 09M.2.hl.TZ2.8d.ii: Draw the geometrical isomers of but-2-ene.
- 09M.2.hl.TZ2.8d.iii: Draw the two enantiomers of butan-2-ol.
- 11M.1.hl.TZ1.33: Which molecule has a chiral centre? A. ...
- 11M.1.hl.TZ1.35: Which two molecules are cis-trans isomers of each other? A. X and Z B. X and...
- 11M.2.hl.TZ2.8a: Deduce the name of one of the isomers which can exist as enantiomers and draw...
- 12M.3.hl.TZ1.D3b: The action of a drug molecule often depends on its shape. Discuss a specific example of a...
- 12M.1.hl.TZ2.38: Which compound has a chiral carbon? A. Propan-2-ol B. 1-bromo-2-methylbutane C. ...
- 12M.1.hl.TZ2.39: What effect of optical isomers on plane-polarized light can be measured using a...
- 11N.1.hl.TZ0.38: Which molecule exhibits optical isomerism? A. 3-iodopentane B. ...
- 11N.3.hl.TZ0.D4a: Using an asterisk (*), identify the chiral carbon atom in the structure of thalidomide.
- 11N.3.hl.TZ0.D4b: Describe the composition of a racemic mixture.
- 11N.1.sl.TZ0.28: From which monomer is this polymer made?
