AQA Chemistry A-level 3.3.7: Optical Isomers Detailed Notes
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Questions and Answers

What is optical isomerism?

  • A type of geometric isomerism
  • A type of functional group isomerism
  • A type of structural isomerism
  • A type of stereoisomerism with different spatial arrangements of atoms (correct)

    • What defines a chiral centre in an organic molecule?

  • It has two identical groups bonded around it
  • It has a line of symmetry
  • It has three different groups bonded around it
  • It has four different groups bonded around it (correct)

    • How many possible isomers are present when a molecule contains a chiral centre?

  • Three
  • Four
  • Two (correct)
  • One

    • What term describes the two different isomers that are mirror images of each other?

    <p>Enantiomers</p> Signup and view all the answers

    How do enantiomers affect plane polarised light?

    <p>They rotate the light by 90 degrees in opposite directions</p> Signup and view all the answers

    What is formed when optical isomers are produced as a pair of enantiomers in a 1:1 ratio?

    <p>Racemic mixture</p> Signup and view all the answers

    What symbol is commonly used to indicate a chiral centre?

    <ul> <li></li> </ul> Signup and view all the answers

    What structural feature leads to the formation of optical isomers?

    <p>Asymmetrical carbon with four different groups around it</p> Signup and view all the answers

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