Class XII

CH3CHO and C6H5CH2CHO can be distinguished chemically by:
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,
Which of the following acids does not exhibit optical isomerism?
  1. Lactic acid
  2. α – amino acids
  3. Tartaric acid
  4. Maleic acid
The aldehydes and ketones undergo one of the following reactions.
  1. nucleophilic addition reactions
  2. substitution reaction
  3. None of these
  4. electrophilic addition reactions
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
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LKG - 12th

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