Which of the following does not give a yellow | vedclass

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(D) The iodoform test is given by compounds containing the $CH_3CO-$ group or the $CH_3CH(OH)-$ group. $C_2H_5OH$ contains the $CH_3CH(OH)-$ group,$CH

Vedclass · Accepted Answer

$HCHO$

Vedclass · Answer

(D) The iodoform test is given by compounds containing the $CH_3CO-$ group or the $CH_3CH(OH)-$ group. $C_2H_5OH$ contains the $CH_3CH(OH)-$ group,$CH_3CHO$ contains the $CH_3CO-$ group,and $CH_3COCH_3$ contains the $CH_3CO-$ group. $HCHO$ (formaldehyde) does not contain either of these groups,so it does not give a yellow precipitate of iodoform $(CHI_3)$ with $I_2$ and $NaOH$. Therefore,the correct option is $(D)$.

Which of the following does not give a yellow precipitate with $I_2$ and $NaOH$?

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$ (i) \ CH_3CH_2COCH_2Cl $
$ (ii) \ C_6H_5COCH_3 $
$ (iii) \ C_6H_5COCHCl_2 $
$ (iv) \ CH_3CH_2COCCl_3 $

Assertion : Protonation of a carbonyl group increases its electrophilic character.
Reason : Protonation of a carbonyl group involves addition of an electrophile on nucleophilic oxygen.

Benzaldehyde and acetaldehyde can be differentiated by

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