Aldehydes, Ketones and Carboxylic Acids PYQs - Last 10 Years

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Last 10 Years Aldehydes, Ketones and Carboxylic Acids Questions

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1Aldehydes Ketones And Carboxylic Acids

' $x$ ' is the product which is obtained from benzene by reacting it with carbon monoxide and hydrogen chloride in the presence of cuprous chloride. ' $y$ ' is the major product obtained from the benzene by reacting it with ethanoyl chlorid...

INTEGER+4 / -12026

2Aldehydes Ketones And Carboxylic Acids

\(\text { Consider the following reaction. }\)

\(\text { The major product }(\mathrm{P}) \text { formed is : }\)

3Aldehydes Ketones And Carboxylic Acids

Given below are two statements :
Statement I : 2, 6-diethylcyclohexanone and 6-methyl-2-n-propylcyclohexanone are metamers.
Statement II : 2, 2, 6, 6 - tetramethylcyclohexanone exhibits keto-enol tautomerism.
In the light of the above state...

4Aldehydes Ketones And Carboxylic Acids

An optically active alkyl bromide $\mathrm{C}_4 \mathrm{H}_9 \mathrm{Br}$, reacts with ethanolic KOH to form major compound $[\mathrm{A}]$ which reacts with bromine to give compound $[\mathrm{B}]$. Compound $[\mathrm{B}]$ reacts with ethano...

5Aldehydes Ketones And Carboxylic Acids

' $x$ ' is the product which is obtained by the hydrolysis of prop-1-yne in the presence of mercuric sulphate under dilute acidic medium at 333 K . ' $y$ ' is the product which is obtained by the reaction of ethane nitrile with methyl magne...

6Aldehydes Ketones And Carboxylic Acids

Given below are two statements:
Statement I: The condensation reaction between $\mathrm{CH_3-CH=O}$ and under optimum pH will produce
Statement II: The molecule, will generate $\mathrm{Ph-CH=O}$ in the presence of dilute acid.
In the ligh...

7Aldehydes Ketones And Carboxylic Acids

\(\text { Complete the following reaction sequence and give the name of major product ' } \mathrm{P} \text { '. }\)

8Aldehydes Ketones And Carboxylic Acids

\(\text { Consider the following sequence of reactions to give the major product }(\mathrm{X})\)

P g of the major product $(\mathrm{X})$ formed is reacted with $\mathrm{NaHCO}_3$ solution to liberate a gas which occupied $11.2 \mathrm{dm...

INTEGER+4 / -12026

9Aldehydes Ketones And Carboxylic Acids

Compound $(\mathrm{X})$ is subjected to the sequence of reactions as shown above. Molar mass of the major product $(\mathrm{Y})$ formed is $\_\_\_\_$ $\mathrm{g} \mathrm{mol}^{-1}$.
(Given molar mass in $\mathrm{g} \mathrm{mol}^{-1} \mathr...

10Aldehydes Ketones And Carboxylic Acids

Identify compounds A and E in the following reaction sequence.

11Aldehydes Ketones And Carboxylic Acids

A molecule (X) with following structure under mild acidic condition is hydrolysed to produce (Y) and (Z). Identify the correct statements about (Y) and (Z).A. Both (Y) and (Z) have same molar mass.B. (Y) and (Z) can be distinguished from ea...

12Aldehydes Ketones And Carboxylic Acids

An organic compound “x” where molar ratio of C, O and H are equal, on treatment with 50% KOH under reflux followed by acidification produced “y”. The most likely structure of “y” is: [Molar mass of ‘x’ is 58 g mol−1]

13Aldehydes Ketones And Carboxylic Acids

\(\text { Given below are two statements for the following reaction sequence. }\)

Statement I : Compound ' $Z$ ' will give yellow precipitate with NaOI .
Statement II : Compound ' Q ' has two different types of ' H ' atoms (aromatic : al...

14Aldehydes Ketones And Carboxylic Acids

\(\text { Given below are the four isomeric compounds }(\mathrm{P}, \mathrm{Q}, \mathrm{R}, \mathrm{~S})\)

Identify correct statements from below.
A. $\mathrm{Q}, \mathrm{R}$ and S will give precipitate with 2, 4-DNP.
B. $P$ and $Q$ will...

15Aldehydes Ketones And Carboxylic Acids

Which of the following reaction is NOT correctly represented?

16Aldehydes Ketones And Carboxylic Acids

The correct order of acidic strength of the major products formed in the given reactions, is :A. $\mathrm{PhNH}_2 \xrightarrow[\substack{\text { (2) } \mathrm{CuCN}^2 \\ \text { (3) } \mathrm{H}_3 \mathrm{O}^{+} / \Delta}]{\text { (1) } \ma...

17Aldehydes Ketones And Carboxylic Acids

\(\text { Consider the following two reactions } \mathrm{A} \text { and } \mathrm{B} \text {. }\)

Numerical value of [molar mass of $x+$ molar mass of $y$ ] is $\_\_\_\_$

18Aldehydes Ketones And Carboxylic Acids

A student is given one compound among the following compounds that gives positive test with Tollen's reagent.

The compound is :

19Aldehydes Ketones And Carboxylic Acids

Grignard reagent $\mathrm{RMgBr}(\mathrm{P})$ reacts with water and forms a gas $(\mathrm{Q})$. One gram of Q occupies $1.4 \mathrm{dm}^3$ at STP. (P) on reaction with dry ice in dry ether followed by $\mathrm{H}_3 \mathrm{O}^{+}$forms a co...

INTEGER+4 / -12026

20Aldehydes Ketones And Carboxylic Acids

Given below are two statements :
Statement I : Cross aldol condensation between two different aldehydes will always produce four different products.
Statement II : When semicarbazide reacts with a mixture of benzaldehyde and acetophenone un...

21Aldehydes Ketones And Carboxylic Acids

The unsaturated ether on acidic hydrolysis produces carbonyl compounds as shown below :-

Based on this, predict the solution/reagent that will help to distinguish "P" and "Q" obtained in the following reaction :-

22Aldehydes Ketones And Carboxylic Acids

\(\text { Compound ' } \mathrm{P} \text { ' undergoes the following sequence of reactions : }\)

\(' \mathrm{P}^{\prime} \text { is : }\)

23Aldehydes Ketones And Carboxylic Acids

The correct sequence of reagents for the above conversion of X to Y is :

24Aldehydes Ketones And Carboxylic Acids

From the given following (A to D) cyclic structures, those which will not react with Tollen's reagent are:

25Aldehydes Ketones And Carboxylic Acids

' $x$ ' is the product which is obtained from propanenitrile and stannous chloride in the presence of hydrochloric acid followed by hydrolysis. ' $y$ ' is the product which is obtained from the but-2-ene by the ozonolysis followed by hydrol...

26Aldehydes Ketones And Carboxylic Acids

Iodoform test can differentiate between
A. Methanol and Ethanol
B. $\mathrm{CH}_3 \mathrm{COOH}$ and $\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{COOH}$
C. Cyclohexene and cyclohexanone
D. Diethyl ether and Pentan-3-one
E. Anisole and acetone
Choos...

27Aldehydes Ketones And Carboxylic Acids

\(\text { Identify (P) }\)

28Aldehydes Ketones And Carboxylic Acids

Which of the following statements are TRUE about Haloform reaction?
A. Sodium hypochlorite reacts with KI to give KOI .
B. KOI is a reducing agent.
C. $\alpha, \beta$-unsaturated methylketone will give
iodoform reaction.
D. Isopropyl alcoh...

29Aldehydes Ketones And Carboxylic Acids

\(\text { Match the LIST-I with LIST-II }\)

List-I Reagents

List-II Name of Reaction involving carbonyl compounds

A.

NH

2

−

<...

30Aldehydes Ketones And Carboxylic Acids

The compound $\mathrm{A}, \mathrm{C}_8 \mathrm{H}_8 \mathrm{O}_2$ reacts with acetophenone to form a single product via cross-Aldol condensation. The compound A on reaction with conc. NaOH forms a substituted benzyl alcohol as one of the tw...

31Aldehydes Ketones And Carboxylic Acids

An organic compound " P " of molecular formula $\mathrm{C}_6 \mathrm{H}_{12} \mathrm{O}_3$ gives positive Iodoform test but negative Tollen's test. When " P " is treated with dilute acid, it produces " Q ". " Q " gives positive Tollen's tes...

32Aldehydes Ketones And Carboxylic Acids

\(\text { Identify A in the following reaction. }\)

33Aldehydes Ketones And Carboxylic Acids

Statement I : Compound (X), shown below, dissolves in NaHCO3 solution and has two chiral carbon atomsStatement II : Compound (Y), shown below, has two carbons with sp3 hybridization, one carbon with sp2 and one carbon with sp hybridizationI...

34Aldehydes Ketones And Carboxylic Acids

Match List - I with List - II.

List – IReagents
List – IIReaction Name (Involving aldehydes)

A. H2, Pd–BaSO4
B. SnCl2, HCl
C. CrO2Cl2, CS2
D. CO, H...

35Aldehydes Ketones And Carboxylic Acids

Choose the correct option for structures of $A$ and $B$, respectively

36Aldehydes Ketones And Carboxylic Acids

When undergoes intramolecular aldol condensation, the major product formed is :

37Aldehydes Ketones And Carboxylic Acids

Identify the structure of the final product (D) in the following sequence of the reactions :

Total number of $\mathrm{sp}^2$ hybridised carbon atoms in product D is ____________.

INTEGER+4 / -12025

38Aldehydes Ketones And Carboxylic Acids

" P " is an optically active compound with molecular formula $\mathrm{C}_6 \mathrm{H}_{12} \mathrm{O}$. When ' P ' is treated with 2, 4-dinitrophenylhydrazine, it gives a positive test. However, in presence of Tollens reagent, " P " gives a...

39Aldehydes Ketones And Carboxylic Acids

An organic compound $(\mathrm{X})$ with molecular formula $\mathrm{C}_3 \mathrm{H}_6 \mathrm{O}$ is not readily oxidised. On reduction it gives $\mathrm{C}_3 \mathrm{H}_8 \mathrm{O}(\mathrm{Y})$ which reacts with HBr to give a bromide $(\ma...

40Aldehydes Ketones And Carboxylic Acids

Aldol condensation is a popular and classical method to prepare $\alpha, \beta$-unsaturated carbonyl compounds. This reaction can be both intermolecular and intramolecular. Predict which one of the following is not a product of intramolecul...

41Aldehydes Ketones And Carboxylic Acids

Which among the following compounds give yellow solid when reacted with $\mathrm{NaOI} / \mathrm{NaOH}$ ?

Choose the correct answer from the options given below :

42Aldehydes Ketones And Carboxylic Acids

Number of molecules from below which cannot give iodoform reaction is :
Ethanol, Isopropyl alcohol, Bromoacetone, 2-Butanol, 2-Butanone, Butanal, 2-Pentanone, 3-Pentanone, Pentanal and 3-Pentanol.

43Aldehydes Ketones And Carboxylic Acids

\(\text {The major product }(\mathrm{P}) \text { in the following reaction is : }\)

44Aldehydes Ketones And Carboxylic Acids

Given below are two statements:
Statement I : Vanilin will react with NaOH and also with Tollen's reagent.
Statement II : Vanilin will undergo self aldol condensation very easily.
In the light of the above statements, choose the most appr...

45Aldehydes Ketones And Carboxylic Acids

An optically active alkyl halide $\mathrm{C}_4 \mathrm{H}_9 \mathrm{Br}[\mathrm{A}]$ reacts with hot KOH dissolved in ethanol and forms alkene $[B]$ as major product which reacts with bromine to give dibromide $[C]$. The compound [C] is con...

46Aldehydes Ketones And Carboxylic Acids

Consider the following reactions. From these reactions which reaction will give carboxylic acid as a major product ?
(A) $\quad \mathrm{R}-\mathrm{C} \equiv \mathrm{N} \xrightarrow[\text { mild condition }]{\text { (i) } \stackrel{+}{\mathr...

47Aldehydes Ketones And Carboxylic Acids

The product (P) formed in the following reaction is :

48Aldehydes Ketones And Carboxylic Acids

In the Claisen-Schmidt reaction to prepare, dibenzalacetone from 5.3 g of benzaldehyde, a total of 3.51 g of product was obtained. The percentage yield in this reaction was _______ %.

INTEGER+4 / -12025

49Aldehydes Ketones And Carboxylic Acids

The compounds that produce $\mathrm{CO}_2$ with aqueous $\mathrm{NaHCO}_3$ solution are:

Choose the correct answer from the options given below:

50Aldehydes Ketones And Carboxylic Acids

A molecule ("P") on treatment with acid undergoes rearrangement and gives ("Q"). ("Q") on ozonolysis followed by reflux under alkaline condition gives (" $R$ "). The structure of (" $R$ ") is given below.

The structure of ("P") is

MCQM+4 / -12025