Chemistry 9701 · AS & A Level · Carbonyl compounds

Carbonyl compounds — practice question

Which reagent could be used to tell ethanal and propanal apart?

  • A2,4-dinitrophenylhydrazine
  • B$\text{I}_2/\text{NaOH(aq)}$
  • C$\text{K}_2\text{Cr}_2\text{O}_7/\text{H}_2\text{SO}_4\text{(aq)}$
  • DTollens’ reagent

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