The tests performed on compound X and their i | vedclass

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(B) The $2, 4-DNP$ test is positive for aldehydes and ketones,indicating the presence of a carbonyl group.The iodoform test is positive for methyl ket

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$2-$(dimethylamino)acetophenone

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(B) The $2, 4-DNP$ test is positive for aldehydes and ketones,indicating the presence of a carbonyl group.The iodoform test is positive for methyl ketones $(-COCH_3)$ or compounds that can be oxidized to methyl ketones (like $CH_3CH(OH)-R$).The azo-dye test is used to detect primary aromatic amines. $A$ negative result indicates that the amine is either not primary or its reactivity is hindered.Option $(B)$ is $2-(dimethylamino)acetophenone$. It contains a $-COCH_3$ group,which gives a positive $2, 4-DNP$ test and a positive iodoform test. The nitrogen atom is tertiary (dimethylamino),so it does not form an azo-dye,consistent with the observations.

Test	Inference
$(a)$ $2, 4-DNP$ test	Coloured precipitate
$(b)$ Iodoform test	Yellow precipitate
$(c)$ Azo-dye test	No dye formation

List-$I$ (Reaction)	List-$II$ (Product)
$A$. $\text{Ketone} + NaBH_4$	$I$. $1^\circ$-alcohol
$B$. $\text{Ester} + LiAlH_4$	$II$. $3^\circ$-alcohol
$C$. $RMgX + \text{Ketone}$	$III$. $2^\circ$-alcohol
	$IV$. $\text{Alkane}$

The tests performed on compound $X$ and their inferences are:

Test Inference

$(a)$ $2, 4-DNP$ test Coloured precipitate

$(b)$ Iodoform test Yellow precipitate

$(c)$ Azo-dye test No dye formation

Compound $X$ is:

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Arrange the following in increasing order of their acidic strength:

Arrange the following compounds in increasing order of their reactivity in nucleophilic addition reactions.
$(i)$ Ethanal,Propanal,Propanone,Butanone.
$(ii)$ Benzaldehyde,$p-$Tolualdehyde,$p-$Nitrobenzaldehyde,Acetophenone.
Hint: Consider steric effect and electronic effect.

Match the following reactions in List-$I$ with their products in List-$II$.
List-$I$ (Reaction) List-$II$ (Product)
$A$. $\text{Ketone} + NaBH_4$ $I$. $1^\circ$-alcohol
$B$. $\text{Ester} + LiAlH_4$ $II$. $3^\circ$-alcohol
$C$. $RMgX + \text{Ketone}$ $III$. $2^\circ$-alcohol
$IV$. $\text{Alkane}$

$CH_3CHO$ $\xrightarrow[5\,^{\circ}C]{10\%\,NaOH}$ $\xrightarrow[\Delta]{}$ $\xrightarrow[Ni]{H_2} (A)$; Product $(A)$ of the reaction is

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The tests performed on compound $X$ and their inferences are: Test Inference $(a)$ $2, 4-DNP$ test Coloured precipitate $(b)$ Iodoform test Yellow precipitate $(c)$ Azo-dye test No dye formation Compound $X$ is: