To distinguish between formaldehyde and aceta | vedclass

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(D) Formaldehyde $(HCHO)$ and acetaldehyde $(CH_3CHO)$ can be distinguished using caustic soda $(NaOH)$ solution.Formaldehyde undergoes the Cannizzaro

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Caustic soda solution

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(D) Formaldehyde $(HCHO)$ and acetaldehyde $(CH_3CHO)$ can be distinguished using caustic soda $(NaOH)$ solution.Formaldehyde undergoes the Cannizzaro reaction because it lacks $\alpha$-hydrogen atoms:$2HCHO + NaOH (conc.) \rightarrow CH_3OH + HCOONa$Acetaldehyde undergoes aldol condensation because it possesses $\alpha$-hydrogen atoms:$2CH_3CHO \xrightarrow{NaOH (dil.)} CH_3-CH(OH)-CH_2-CHO$Thus,option $(D)$ is the correct choice.

To distinguish between formaldehyde and acetaldehyde,we require

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