Q25 / 160 · TS EAMCET 2006 · Chemistry

When acetaldehyde is heated with Fehling solution, a red precipitate is formed. Which of the following is that?

  • Correct answer
    A
    $\mathrm{Cu}_2 \mathrm{O}$
  • B
    $\mathrm{Cu}$
  • C
    $\mathrm{CuO}$
  • D
    $\mathrm{CuSO}_4$

Solution

When acetaldehyde is heated with Fehling solution, a red precipitate of $\mathrm{Cu}_2 \mathrm{O}$ is obtained. $\mathrm{CH}_3 \mathrm{CHO}+2 \mathrm{Cu}(\mathrm{OH})_2+\mathrm{NaOH} \longrightarrow$$\mathrm{CH}_3 \cdot \mathrm{COONa}+\mathrm{Cu}_2 \mathrm{O} \downarrow(Red)+3 \mathrm{H}_2 \mathrm{O}$

Hence, the correct answer is option: 'A'.

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