CBSE  /  Class 12  /  Chemistry  /  Aldehydes, Ketones and Carboxylic Acids

  • 1. 
    benzaldehyde

  • 3 and 4 only
  • 2 and 5 only
  • 1, 2 and 3 only
  • 2, 3 and 5 only

  • 2. 
    Aldehydes other than formaldehyde react with Grignard’s reagent to give addition products which on hydrolysis give

  • tertiary alcohols
  • secondary alcohols
  • primary alcohols
  • carboxylic acids

  • 3. 
    Which of the following will not give aldol condensation?

  • Phenyl acetaldehyde
  • 2-Methylpentanal
  • Benzaldehyde
  • 1-Phenylpropanone

  • 4. 
    The product of hydrolysis of ozonide of 1-butene are

  • ethanol only
  • ethanal and methanal
  • propanal and methanal
  • methanal only

  • 5. 
    α-Hydroxypropanoic acid can be preapred from ethanal by following the steps given in the sequence

  • Treat with HCN followed by acidic hydrolysis
  • Treat with NaHSO followed by reaction with NaCO
  • Treat with HSO
  • Treat with KCrO

  • 6. 
    Benzoyl Chloride on reduction with H/Pd-BaSO produces

  • benzoic acid
  • benzyl alochol
  • benzoyl sulphate
  • benzaldehyde

  • 7. 
    What is the test to differentiate between penta-2-one and pentan-3-one?

  • Iodoform test
  • Benedict’s test
  • Fehling’s test
  • Aldol condensation test

  • 8. 
    Which of the following does not undergoCannizzarro’s reaction?

  • Benzaldehyde
  • 2-Methylpropanal
  • p-Methoxybenzaldehyde
  • 2, 2-Dimethylpropanal

  • 9. 
    Aldehydes that do not undergo aldol condensation are

  • 10. 
    propanal

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