Which of the following gives condensation wit | vedclass

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(A) Aldehydes and ketones react with hydroxylamine $(NH_2OH)$ to form oximes,which is a condensation reaction.Self-condensation (Aldol condensation) r

Vedclass · Accepted Answer

Methanal

Vedclass · Answer

(A) Aldehydes and ketones react with hydroxylamine $(NH_2OH)$ to form oximes,which is a condensation reaction.Self-condensation (Aldol condensation) requires the presence of at least one $\alpha$-hydrogen atom.Methanal $(HCHO)$ does not contain any $\alpha$-hydrogen atom,so it cannot undergo self-aldol condensation.Propanal $(CH_3CH_2CHO)$,Acetone $(CH_3COCH_3)$,and Ethanal $(CH_3CHO)$ all contain $\alpha$-hydrogen atoms and thus undergo self-condensation.Therefore,the correct answer is Methanal.

Which of the following gives condensation with hydroxylamine but does not undergo self-condensation?

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