Class XII

Which of the following acids does not exhibit optical isomerism?
  1. Lactic acid
  2. α – amino acids
  3. Tartaric acid
  4. Maleic acid
CH3CHO and C6H5CH2CHO can be distinguished chemically by:
Arrange the following alcohols, hydrocarbon and ether in order of their increasing boiling points Pentan – 1 – ol, n – butane, pentanal, ethoxyethane.
  1. ethoxyethane, pentanal and pentan – 1 – ol, n – Butane
  2. pentan – 1 – ol , n – Butane, ethoxyethane, pentanal
  3. n – Butane, ethoxyethane, pentanal and pentan – 1 – ol.
  4. pentanal and pentan – 1 – ol, n – Butane, ethoxyethane``4444444444444444444444444444444444444`````````````````````````````````````````````````````````````````````
The compound obtained when acetaldehyde reacts with dilute aqueous sodium hydroxide exhibits:
  1. both optical and geometrical isomerism
  2. optical isomerism.
  3. geometrical isomerism
  4. neither optical nor geometrical isomerism
Arrange the following sets of compounds in order of their increasing boiling points : Pentan – 1 – ol, butan – 1 – ol, butan – 2 – ol, ethanol, propan – 1 – ol, methanol
  1. Butan – 2 – ol, butan – 1 – ol, pentan – 1 – ol, methanol, ethanol, propan – 1 – ol,
  2. Methanol, ethanol, propan – 1 – ol, butan – 2 – ol, butan – 1 – ol, pentan – 1 – ol.
  3. Propan – 1 – ol, butan – 2 – ol, butan – 1 – ol, pentan – 1 – ol, methanol, ethanol
  4. Pentan – 1 – ol Methanol, ethanol, propan – 1 – ol, butan – 2 – ol, butan – 1 – ol,
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LKG - 12th

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