Aldehydes Ketones and Carboxylic Acids — JEE Advanced PYQs

The sum of total number of carbonyl groups $(>\mathrm{C}=\mathrm{O})$ present in the major products X and Y in the following reactions is ____.

The major products obtained from the reactions in List-II are the reactants for the named reactions mentioned in List-I. Match each entry in List-I with the appropriate entry in List-II and choose the correct options.

List-I
(P) Stephen reaction
(Q) Sandmeyer reaction
(R) Hoffma …

The correct reaction/reaction sequence that would produce a dicarboxylic acid as the major product is

Reaction of iso-propylbenzene with ${\mathrm{O}}_2$ followed by the treatment with ${\mathrm{H}}_3{\mathrm{O}}^{+}$ forms phenol and a by-product P. Reaction of P with 3 equivalents of ${\mathrm{Cl}}_2$ gives compound Q. Treatment of Q with $\mathrm{Ca}(\mathrm{OH}{)}_2$ produces c …

Complete reaction of acetaldehyde with excess formaldehyde, upon heating with conc. NaOH solution, gives P and Q. Compound P does not give Tollens' test, whereas Q on acidification gives positive Tollens' test. Treatment of P with excess cyclohexanone in the presence of catalytic …

The option(s) with correct sequence of reagents for the conversion of $\mathbf{P}$ to $\mathbf{Q}$ is(are) :

The major products obtained from the reactions in List-II are the reactants for the named reactions mentioned in List-I. Match List-I with List-II and choose the correct option.

List-I
(P) Etard reaction
(Q) Gattermann reaction
(R) Gattermann-Koch reaction
(S) Rosenmund reductio …

Considering the reaction sequence given below, the correct statement(s) is(are)

Considering the following reaction sequence, the correct statement(s) is(are)

The correct order of acid strength of the following carboxylic acids is -

In the following reaction sequence, the amount of D (in g) formed from 10 moles of acetophenone is ____.

(Atomic weights in $\mathrm{g}{\mathrm{mol}}^{-1}$: $\mathrm{H}=1$, $\mathrm{C}=12$, $\mathrm{N}=14$, $\mathrm{O}=16$, $\mathrm{Br}=80$. The yield (%) corresponding to the pro …

The desired product X can be prepared by reacting the major product of the reactions in LIST-I with one or more appropriate reagents in LIST-II.

(Given, order of migratory aptitude: aryl > alkyl > hydrogen)
| P. (see structure) | 1. …

Compounds P and R upon ozonolysis produce Q and S, respectively. The molecular formula of $\mathbf{Q}$ and $\mathbf{S}$ is ${\mathrm{C}}_8{\mathrm{H}}_8\mathrm{O}$. Q undergoes Cannizzaro reaction but not haloform reaction, whereas $\mathbf{S}$ undergoes haloform reaction but n …

| (III) Benzaldehyde | (iii) …

| (III) Benzaldehyde | (iii) …

Positive Tollen's test is observed for

The total number of carboxylic acid groups in the product $\mathbf{P}$ is

In the following reaction, the product(s) formed is(are)

After completion of the reactions (I and II), the organic compound(s) in the reaction mixtures is(are)

Reaction I:

Reaction II:

The compound that undergoes decarboxylation most readily under mild condition is

The major product $\mathbf{H}$ of the given reaction sequence is

In the following reaction sequence, the compound J is an intermediate. …

With reference to the scheme given, which of the given statment(s) about T, U, V and W is (are) correct ?

The number of aldol reaction(s) that occurs in the given transformation is

The carboxyl functional group $(-\mathrm{COOH})$ is present in

Two aliphatic aldehydes P and Q react in the presence of aqueous ${\mathrm{K}}_2{\mathrm{CO}}_3$ to give compound R, which upon treatment with HCN provides compound S. On acidification and heating, S gives the product shown below :

The compounds P and Q respectively are

Two aliphatic aldehydes P and Q react in the presence of aqueous ${\mathrm{K}}_2{\mathrm{CO}}_3$ to give compound R, which upon treatment with HCN provides compound S. On acidification and heating, S gives the product shown below :

The compound R is

A carbonyl compound P, which gives positive iodoform test, undergoes reaction with MeMgBr followed by dehydration to give an olefin Q. Ozonolysis of Q leads to a dicarbonyl compound R, which undergoes intramolecular aldol reaction to give predominantly S.

The structure of the ca …

A carbonyl compound P, which gives positive iodoform test, undergoes reaction with MeMgBr followed by dehydration to give an olefin Q. Ozonolysis of Q leads to a dicarbonyl compound R, which undergoes intramolecular aldol reaction to give predominantly S.

The structures of the p …

A carbonyl compound P, which gives positive iodoform test, undergoes reaction with MeMgBr followed by dehydration to give an olefin Q. Ozonolysis of Q leads to a dicarbonyl compound R, which undergoes intramolecular aldol reaction to give predominantly S.

The structure of the pr …

A tertiary alcohol $\mathbf{H}$ upon acid catalysed dehydration gives a product I. Ozonolysis of I leads to compounds J and K. Compound J upon reaction with KOH gives benzyl alcohol and a compound $\mathbf{L}$, whereas $\mathbf{K}$ on reaction with KOH gives only …

Cyclohexene on ozonolysis followed by reaction with zinc dust and water gives compound E. Compound E on further treatment with aqueous KOH yields compound F. Compound F is

STATEMENT-1 : Glucose gives a reddish-brown precipitate with Fehling's solution.
because
STATEMENT-2 : Reaction of glucose with Fehling's solution gives CuO and gluconic acid.

Which of the following reactants on reaction with conc. NaOH followed by acidification gives the following lactone as the only product?