Which of the following can be distinguished b | vedclass

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(D) The iodoform reaction is given by compounds containing the $CH_3CO-$ group or the $CH_3CH(OH)-$ group.$(1)$ Ethyl alcohol $(CH_3CH_2OH)$ gives a p

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(D) The iodoform reaction is given by compounds containing the $CH_3CO-$ group or the $CH_3CH(OH)-$ group.$(1)$ Ethyl alcohol $(CH_3CH_2OH)$ gives a positive iodoform test,whereas other $1^{\circ}$ alcohols (like $CH_3CH_2CH_2OH$) do not.$(2)$ $CH_3CHO$ contains the $CH_3CO-$ group and gives a positive test,while $HCHO$ does not.$(3)$ $CH_3CHO$ gives a positive test,while $CH_3CH_2CHO$ does not.Since all the given pairs can be distinguished by the iodoform reaction,the correct answer is $D$.

Which of the following can be distinguished by the iodoform reaction?

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