Given below are the four isomeric compounds ( | vedclass

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Question

(A) The structures are: $P$ ($1$-phenylprop$-2-$en$-1-$ol), $Q$ ($3$-phenylpropanal), $R$ ($1$-phenylpropan$-2-$one), $S$ ($1$-phenylpropan$-1-$one).$

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$A, C$ and $E$ only

Vedclass · Answer

(A) The structures are: $P$ ($1$-phenylprop$-2-$en$-1-$ol), $Q$ ($3$-phenylpropanal), $R$ ($1$-phenylpropan$-2-$one), $S$ ($1$-phenylpropan$-1-$one).$A$. $2,4-DNP$ reacts with aldehydes and ketones. $Q$ (aldehyde), $R$ (ketone), and $S$ (ketone) give the test. Statement $A$ is correct.$B$. Bayer's test is for unsaturation. Only $P$ has a double bond. Statement $B$ is incorrect.$C$. Aromatic compounds give a sooty flame. All four compounds contain a phenyl ring, so all give a sooty flame. Statement $C$ is technically correct, but we evaluate based on the options provided.$D$. $I_2/NaOH$ (Iodoform test) requires a $CH_3CO-$ group or $CH_3CH(OH)-$ group. $R$ has $CH_3CO-$ and $S$ does not. Statement $D$ is incorrect.$E$. Tollen's reagent is for aldehydes. Only $Q$ is an aldehyde. Statement $E$ is correct.Combining the correct statements $A, C, E$, the correct option is $A$.

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

Similar Questions

Explain the mechanism of nucleophilic addition reactions of aldehyde and ketone compounds.

Identify the final product $D$ in the given reaction sequence:
$CH_3CH_2Cl$ $\xrightarrow{Aq. KOH} A$ $\xrightarrow{PCC} B$ $\xrightarrow{Cl_2/NaOH} C$ $\xrightarrow{Acetone} D$
Product $D$ is known as:

Acetone reacts with $I_2$ in the presence of $NaOH$ to form:

Methyl ketone can be oxidized using the haloform reaction. The oxidized product (carboxylate ion) has $:-$

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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