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Define Optical activity....

Define Optical activity.

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Optical Activity : This property of a substance by virtue of which it rotates the plane of polarised light is called optical activity.
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Define optically activity ?

Optically active 2-iodobutane on treatement with Nal in acetone gives a product which does not show optical activity. Explain.

Knowledge Check

  • Which of the following is not a colligative property? Elevation in Boiling point Depression in freezing point Optical activity Relative lowering of vapour pressure

    A
    Depressing in freezing point
    B
    Elevation in boiling point
    C
    Optical activity
    D
    Relative lowering in vapour pressure.

  • Optical activity of lactic acid can be measured by :

    A
    Spectrophotometer
    B
    Colorimeter
    C
    Lactometer
    D
    Polarimeter

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    Define optical isomerism. Give one example of optical isomers.

    Except glycine all other naturally occurring amino acids are optically active.

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