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:
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 compounds in decreasing order of their acid strength: i) trichloroacetic acid ii) trifluoroacetic acid iii) acetic acid and iv)formic acid
  1. trifluoroacetic acid, trichloroacetic acid, formic acid and acetic acid
  2. trifluoroacetic acid, trichloroacetic acid, formic acid.and acetic acid
  3. trichloroacetic acid, trifluoroacetic acid, acetic acid and formic acid.
  4. trifluoroacetic acid, formic acid acetic acid and Propan – 1 – ol, 4 – methylphenol
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
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