Among the following,the number of compounds w | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(C) Compounds that give a positive iodoform test must contain either a methyl ketone group $(CH_3CO-)$ or a methyl carbinol group $(CH_3CH(OH)-)$.$(a)

Vedclass · Accepted Answer

$4$

Vedclass · Answer

(C) Compounds that give a positive iodoform test must contain either a methyl ketone group $(CH_3CO-)$ or a methyl carbinol group $(CH_3CH(OH)-)$.$(a)$ $1-$Phenylbutan$-2-$one: Structure is $Ph-CH_2-CO-CH_2-CH_3$. It does not contain a $CH_3CO-$ group. (Negative)$(b)$ $2-$Methylbutan$-2-$ol: Structure is $CH_3-C(OH)(CH_3)-CH_2-CH_3$. It does not contain a $CH_3CH(OH)-$ group. (Negative)$(c)$ $3-$Methylbutan$-2-$ol: Structure is $CH_3-CH(OH)-CH(CH_3)_2$. It contains a $CH_3CH(OH)-$ group. (Positive)$(d)$ $1-$Phenylethanol: Structure is $Ph-CH(OH)-CH_3$. It contains a $CH_3CH(OH)-$ group. (Positive)$(e)$ $3,3-$dimethylbutan$-2-$one: Structure is $CH_3-CO-C(CH_3)_3$. It contains a $CH_3CO-$ group. (Positive)$(f)$ $1-$Phenylpropan$-2-$ol: Structure is $Ph-CH_2-CH(OH)-CH_3$. It contains a $CH_3CH(OH)-$ group. (Positive)Thus,the compounds $(c)$,$(d)$,$(e)$,and $(f)$ give a positive iodoform reaction. The total number of such compounds is $4$.

List-$I$	List-$II$
$A$. Tollen's reagent	$I$. Para-rosaniline + $SO_2$
$B$. Schiff's reagent	$II$. Rochelle salt + $aq. NaOH$
$C$. Rosenmund reduction	$III$. Ammoniacal silver nitrate
$D$. Fehling solution $B$	$IV$. $Pd + BaSO_4$

Among the following,the number of compounds which will give positive iodoform reaction is:
$(a)$ $1-$Phenylbutan$-2-$one
$(b)$ $2-$Methylbutan$-2-$ol
$(c)$ $3-$Methylbutan$-2-$ol
$(d)$ $1-$Phenylethanol
$(e)$ $3,3-$dimethylbutan$-2-$one
$(f)$ $1-$Phenylpropan$-2-$ol

Similar Questions

The reaction involving the reduction of a ketone to an alkane using zinc amalgam $(Zn-Hg)$ and concentrated hydrochloric acid $(HCl)$ is known as:

Arrange the following compounds in the correct order of their reactivity towards nucleophilic addition reactions:
$I: CH_3CHO$
$II: CH_3CONH_2$
$III: HCHO$
$IV: CH_3COCH_3$

Which of the following reagents reacts with benzaldehyde to produce $1$-phenylethanol?

The structure of the starting compound $P$ used in the reaction given below is:

Vedclass Test Series

Exam Paper Generator

Online Exam Module

Among the following,the number of compounds which will give positive iodoform reaction is:$(a)$ $1-$Phenylbutan$-2-$one$(b)$ $2-$Methylbutan$-2-$ol$(c)$ $3-$Methylbutan$-2-$ol$(d)$ $1-$Phenylethanol$(e)$ $3,3-$dimethylbutan$-2-$one$(f)$ $1-$Phenylpropan$-2-$ol