Aldehydes, Ketones and Carboxylic Acids · Chemistry · JEE Main

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MCQ (Single Correct Answer)

1
When JEE Main 2025 (Online) 8th April Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 10 English undergoes intramolecular aldol condensation, the major product formed is :
JEE Main 2025 (Online) 8th April Evening Shift
2

JEE Main 2025 (Online) 8th April Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 9 English

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

JEE Main 2025 (Online) 8th April Evening Shift
3
" 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 negative test. Predict the structure of " P ".
JEE Main 2025 (Online) 7th April Evening Shift
4

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

JEE Main 2025 (Online) 4th April Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 4 English

Choose the correct answer from the options given below :

JEE Main 2025 (Online) 4th April Evening Shift
5

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 intramolecular aldol condensation?

JEE Main 2025 (Online) 4th April Morning Shift
6

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 $(\mathrm{Z})$ which is converted to Grignard reagent. This Grignard reagent on reaction with $(\mathrm{X})$ followed by hydrolysis give 2,3-dimethylbutan-2-ol. Compounds $(\mathrm{X}),(\mathrm{Y})$ and $(\mathrm{Z})$ respectively are:

JEE Main 2025 (Online) 4th April Morning Shift
7

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

JEE Main 2025 (Online) 3rd April Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 1 English
JEE Main 2025 (Online) 3rd April Evening Shift
8

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.

JEE Main 2025 (Online) 3rd April Morning Shift
9

Consider the following reactions. From these reactions which reaction will give carboxylic acid as a major product ?

(A) $\quad \mathrm{R}-\mathrm{C} \equiv \mathrm{N} \xrightarrow[\text { mild condition }]{\text { (i) } \stackrel{+}{\mathrm{H}} / \mathrm{H}_2 \mathrm{O}}$

(B) $\quad \mathrm{R}-\mathrm{MgX} \xrightarrow[\text { (ii) } \mathrm{H}_3 \mathrm{O}^{+}]{\text {(i) } \mathrm{CO}_2}$

(C) $\mathrm{R}-\mathrm{C} \equiv \mathrm{N} \xrightarrow[\text { (ii) } \mathrm{H}_3 \mathrm{O}^{+}]{\text {(i) } \mathrm{SnCl}_2 / \mathrm{HCl}}$

(D) $\quad \mathrm{R} \cdot \mathrm{CH}_2 \cdot \mathrm{OH} \xrightarrow{\mathrm{PCC}}$

(E) JEE Main 2025 (Online) 2nd April Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 8 English

Choose the correct answer from the options given below :

JEE Main 2025 (Online) 2nd April Evening Shift
10

Given below are two statements:

Statement I : Vanilin JEE Main 2025 (Online) 2nd April Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 11 English 1 will react with NaOH and also with Tollen's reagent.

Statement II : Vanilin JEE Main 2025 (Online) 2nd April Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 11 English 2 will undergo self aldol condensation very easily.

In the light of the above statements, choose the most appropriate answer from the options given below :

JEE Main 2025 (Online) 2nd April Morning Shift
11

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 converted into a gas [D] upon reacting with alcoholic $\mathrm{NaNH}_2$. During hydration 18 gram of water is added to 1 mole of gas [D] on warming with mercuric sulphate and dilute acid at 333 K to form compound [E]. The IUPAC name of compound [ E ] is :

JEE Main 2025 (Online) 2nd April Morning Shift
12

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

JEE Main 2025 (Online) 29th January Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 25 English
JEE Main 2025 (Online) 29th January Morning Shift
13

The total number of compounds from below when treated with hot KMnO4, giving benzoic acid is:

JEE Main 2025 (Online) 28th January Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 23 English 1JEE Main 2025 (Online) 28th January Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 23 English 2
JEE Main 2025 (Online) 28th January Evening Shift
14

Both acetaldehyde and acetone (individually) undergo which of the following reactions?

A. Iodoform Reaction

B. Cannizaro Reaction

C. Aldol Condensation

D. Tollen's Test

E. Clemmensen Reduction

Choose the correct answer from the options given below:

JEE Main 2025 (Online) 28th January Morning Shift
15

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

JEE Main 2025 (Online) 28th January Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 13 English

Choose the correct answer from the options given below:

JEE Main 2025 (Online) 28th January Morning Shift
16

Match List - I with List - II.

List - I List - II
(A) JEE Main 2025 (Online) 24th January Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 16 English 1 (I) Etard reaction
(B) JEE Main 2025 (Online) 24th January Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 16 English 2 (II) Gatterman-Koch reaction
(C) JEE Main 2025 (Online) 24th January Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 16 English 3 (III) Rosenmund reduction
(D) JEE Main 2025 (Online) 24th January Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 16 English 4 (IV) Stephen reaction

Choose the correct answer from the options given below :

JEE Main 2025 (Online) 24th January Evening Shift
17

Which of the following arrangements with respect to their reactivity in nucleophilic addition reaction is correct?

JEE Main 2025 (Online) 24th January Morning Shift
18

Aman has been asked to synthesise the molecule JEE Main 2025 (Online) 24th January Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 17 English He thought of preparing the molecule using an aldol condensation reaction. He found a few cyclic alkenes in his laboratory. He thought of performing ozonolysis reaction on alkene to produce a dicarbonyl compound followed by aldol reaction to prepare " $x$ ". Predict the suitable alkene that can lead to the formation of " $x$ ".

JEE Main 2025 (Online) 24th January Morning Shift
19

Given below are two statements:

Consider the following reaction

JEE Main 2025 (Online) 23rd January Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 19 English 1

Statement (I): In the case of formaldehyde JEE Main 2025 (Online) 23rd January Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 19 English 2 is about 2280, due to small substituents, hydration is faster.

Statement (II) : In the case of trichloro acetaldehyde JEE Main 2025 (Online) 23rd January Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 19 English 3 is about 2000 due to $-$I effect of $-$Cl .

In the light of the above statements, choose the correct answer from the options given below :

JEE Main 2025 (Online) 23rd January Evening Shift
20

The major product of the following reaction is :

$\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}=\mathrm{O} \xrightarrow[\text { reflux }]{\substack{\text { excess } \mathrm{HCHO} \\ \text { alkali }}}$ ?

JEE Main 2025 (Online) 23rd January Morning Shift
21

JEE Main 2025 (Online) 22nd January Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 22 English

Residue (A) + HCl (dil) $\rightarrow$ Compound (B)

Structure of residue (A) and compound (B) formed respectively is :

JEE Main 2025 (Online) 22nd January Evening Shift
22

The compounds which give positive Fehling's test are :

JEE Main 2025 (Online) 22nd January Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 24 English

Choose the correct answer from the options given below :

JEE Main 2025 (Online) 22nd January Morning Shift
23

JEE Main 2024 (Online) 9th April Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 41 English

In the above reaction product 'P' is

JEE Main 2024 (Online) 9th April Evening Shift
24

Which of the following compounds will give silver mirror with ammoniacal silver nitrate?

A. Formic acid

B. Formaldehyde

C. Benzaldehyde

D. Acetone

Choose the correct answer from the options given below :

JEE Main 2024 (Online) 9th April Evening Shift
25

Identify major product "X" formed in the following reaction :

JEE Main 2024 (Online) 9th April Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 40 English

JEE Main 2024 (Online) 9th April Morning Shift
26

JEE Main 2024 (Online) 9th April Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 39 English

What is the structure of C?

JEE Main 2024 (Online) 9th April Morning Shift
27

Identify the product (P) in the following reaction:

JEE Main 2024 (Online) 8th April Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 34 English

JEE Main 2024 (Online) 8th April Morning Shift
28

Consider the given reaction, identify the major product P.

JEE Main 2024 (Online) 6th April Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 28 English

JEE Main 2024 (Online) 6th April Evening Shift
29

Which among the following aldehydes is most reactive towards nucleophilic addition reactions?

JEE Main 2024 (Online) 6th April Morning Shift
30

Identify A and B in the given chemical reaction sequence :

JEE Main 2024 (Online) 5th April Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 29 English

JEE Main 2024 (Online) 5th April Evening Shift
31

Consider the given chemical reaction :

JEE Main 2024 (Online) 5th April Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 31 English

Product "A" is :

JEE Main 2024 (Online) 5th April Evening Shift
32

Identify 'A' in the following reaction :

JEE Main 2024 (Online) 5th April Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 33 English

JEE Main 2024 (Online) 5th April Morning Shift
33

Given below are two statements :

Statements I : Acidity of $$\alpha$$-hydrogens of aldehydes and ketones is responsible for Aldol reaction.

Statement II : Reaction between benzaldehyde and ethanal will NOT give Cross - Aldol product.

In the light of the above statements, choose the most appropriate answer from the options given below :

JEE Main 2024 (Online) 4th April Morning Shift
34

Identify the product in the following reaction:

JEE Main 2024 (Online) 4th April Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 37 English

JEE Main 2024 (Online) 4th April Morning Shift
35
Which among the followng has highest boiling point?
JEE Main 2024 (Online) 1st February Evening Shift
36
Identify $A$ and $B$ in the following sequence of reaction

JEE Main 2024 (Online) 1st February Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 56 English
JEE Main 2024 (Online) 1st February Morning Shift
37
Match List - I with List - II.

List I (Reactions) List II (Reagents)
(A) JEE Main 2024 (Online) 1st February Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 55 English 1 (I) CH3MgBr, H2O
(B) C6H5COC6H5 ⟶ C6H5CH=C6H5 (II) Zn(Hg) and conc. HCl
(C) C6H5CHO ⟶ C6H5CH(OH)CH3 (III) NaBH4, H+
(D) JEE Main 2024 (Online) 1st February Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 55 English 2 (IV) DIBAL-H, H2O


Choose the correct answer from the options given below :
JEE Main 2024 (Online) 1st February Morning Shift
38

Identify major product 'P' formed in the following reaction.

JEE Main 2024 (Online) 31st January Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 52 English

JEE Main 2024 (Online) 31st January Evening Shift
39

Identify the name reaction.

JEE Main 2024 (Online) 31st January Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 51 English

JEE Main 2024 (Online) 31st January Evening Shift
40

Salicylaldehyde is synthesized from phenol, when reacted with

JEE Main 2024 (Online) 30th January Evening Shift
41

m-chlorobenzaldehyde on treatment with 50% KOH solution yields :

JEE Main 2024 (Online) 30th January Evening Shift
42

JEE Main 2024 (Online) 30th January Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 44 English

This reduction reaction is known as:

JEE Main 2024 (Online) 30th January Morning Shift
43

Structure of 4-Methylpent-2-enal is :

JEE Main 2024 (Online) 30th January Morning Shift
44

Identify the reagents used for the following conversion

JEE Main 2024 (Online) 29th January Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 48 English

JEE Main 2024 (Online) 29th January Evening Shift
45

The molecular formula of second homologue in the homologous series of mono carboxylic acids is

JEE Main 2024 (Online) 27th January Evening Shift
46

Highest enol content will be shown by:

JEE Main 2024 (Online) 27th January Morning Shift
47
JEE Main 2023 (Online) 15th April Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 70 English
In the above conversion the correct sequence of reagents to be added is
JEE Main 2023 (Online) 15th April Morning Shift
48

In the reaction given below

JEE Main 2023 (Online) 13th April Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 69 English

'A' is

JEE Main 2023 (Online) 13th April Morning Shift
49

JEE Main 2023 (Online) 12th April Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 66 English

The two products formed in above reaction are -

JEE Main 2023 (Online) 12th April Morning Shift
50

JEE Main 2023 (Online) 12th April Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 67 English

'A' in the above reaction is:

JEE Main 2023 (Online) 12th April Morning Shift
51

In the following reaction

JEE Main 2023 (Online) 12th April Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 68 English

'A' is

JEE Main 2023 (Online) 12th April Morning Shift
52

The major product 'P' formed in the following sequence of reactions is

JEE Main 2023 (Online) 12th April Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 65 English

JEE Main 2023 (Online) 12th April Morning Shift
53

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R.

Assertion A : A solution of the product obtained by heating a mole of glycine with a mole of chlorine in presence of red phosphorous generates chiral carbon atom.

Reason R : A molecule with 2 chiral carbons is always optically active.

In the light of the above statements, choose the correct answer from the options given below:

JEE Main 2023 (Online) 11th April Evening Shift
54

JEE Main 2023 (Online) 11th April Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 61 English

'A' and 'B' in the above reactions are:

JEE Main 2023 (Online) 11th April Morning Shift
55

The major product 'P' formed in the given reaction is

JEE Main 2023 (Online) 10th April Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 60 English

JEE Main 2023 (Online) 10th April Morning Shift
56

The major product formed in the following reaction is:

JEE Main 2023 (Online) 8th April Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 58 English

JEE Main 2023 (Online) 8th April Morning Shift
57

Match List I with List II:

LIST I (Reagents used) LIST II (Compound with Functional group detected)
A. Alkaline solution of copper sulphate and sodium citrate I. JEE Main 2023 (Online) 8th April Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 59 English 1
B. Neutral $$\mathrm{FeCl_3}$$ II. JEE Main 2023 (Online) 8th April Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 59 English 2
C. Alkaline chloroform solution III. JEE Main 2023 (Online) 8th April Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 59 English 3
D. Potassium iodide and sodium hypochlorite IV. JEE Main 2023 (Online) 8th April Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 59 English 4

Choose the correct answer from the options given below:

JEE Main 2023 (Online) 8th April Morning Shift
58

In a reaction,

JEE Main 2023 (Online) 1st February Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 87 English

reagents 'X' and 'Y' respectively are :

JEE Main 2023 (Online) 1st February Evening Shift
59

The structures of major products A, B and C in the following reaction are sequence.

JEE Main 2023 (Online) 1st February Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 86 English

JEE Main 2023 (Online) 1st February Evening Shift
60
Cyclohexylamine when treated with nitrous acid yields $(\mathrm{P})$. On treating $(\mathrm{P})$ with $\mathrm{PCC}$ results in (Q). When $(\mathrm{Q})$ is heated with dil. $\mathrm{NaOH}$ we get $(\mathrm{R})$ The final product (R) is :
JEE Main 2023 (Online) 31st January Evening Shift
61

Consider the following reaction

JEE Main 2023 (Online) 31st January Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 82 English

The correct statement for product B is. It is

JEE Main 2023 (Online) 31st January Morning Shift
62
Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R.

Assertion A: JEE Main 2023 (Online) 30th January Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 81 English 1 can be easily reduced using $\mathrm{Zn}-\mathrm{Hg} / \mathrm{HCl}$ to JEE Main 2023 (Online) 30th January Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 81 English 2

Reason $\mathrm{R}: \mathrm{Zn}-\mathrm{Hg} / \mathrm{HCl}$ is used to reduce carbonyl group to $-\mathrm{CH}_{2}-$ group.

In the light of the above statements, choose the correct answer from the options given below:
JEE Main 2023 (Online) 30th January Evening Shift
63

What is the correct order of acidity of the protons marked $$\mathrm{A}-\mathrm{D}$$ in the given compounds ?

JEE Main 2023 (Online) 30th January Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 78 English

JEE Main 2023 (Online) 30th January Morning Shift
64

Which of the following compounds would give the following set of qualitative analysis ?

(i) Fehling's Test : Positive

(ii) Na fusion extract upon treatment with sodium nitroprusside gives a blood red colour but not prussian blue.

JEE Main 2023 (Online) 30th January Morning Shift
65

Find out the major products from the following reaction sequence.

JEE Main 2023 (Online) 29th January Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 76 English

JEE Main 2023 (Online) 29th January Evening Shift
66

'A' in the given reaction is

JEE Main 2023 (Online) 25th January Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 74 English

JEE Main 2023 (Online) 25th January Evening Shift
67

Identify the product formed (A and E)

JEE Main 2023 (Online) 25th January Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 73 English

JEE Main 2023 (Online) 25th January Morning Shift
68

'R' formed in the following sequence of reactions is :

JEE Main 2023 (Online) 24th January Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 72 English

JEE Main 2023 (Online) 24th January Morning Shift
69

Compound (X) undergoes following sequence of reactions to give the Lactone (Y).

JEE Main 2023 (Online) 24th January Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 71 English

JEE Main 2023 (Online) 24th January Morning Shift
70

Correct structure of $$\gamma$$-methylcyclohexane carbaldehyde is

JEE Main 2022 (Online) 29th July Evening Shift
71

JEE Main 2022 (Online) 29th July Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 90 English

Consider the above reaction sequence, the Product 'C' is :

JEE Main 2022 (Online) 29th July Morning Shift
72

JEE Main 2022 (Online) 28th July Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 91 English

Find out the major product for the above reaction.

JEE Main 2022 (Online) 28th July Evening Shift
73

The structure of A in the given reaction is :

JEE Main 2022 (Online) 27th July Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 92 English

JEE Main 2022 (Online) 27th July Evening Shift
74

Match List - I with List - II.

List - I List - II
(A) JEE Main 2022 (Online) 27th July Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 94 English 1 (I) Gatterman Koch reaction
(B) $$C{H_3} - CN\mathrel{\mathop{\kern0pt\longrightarrow}
\limits_{{H_3}{O^ + }}^{SnC{l_2}/HCl}} C{H_3} - CHO$$
(II) Etard reaction
(C) JEE Main 2022 (Online) 27th July Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 94 English 2 (III) Stephen reaction
(D) JEE Main 2022 (Online) 27th July Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 94 English 3 (IV) Rosenmund reaction

Choose the correct answer from the options given below :

JEE Main 2022 (Online) 27th July Evening Shift
75

JEE Main 2022 (Online) 26th July Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 95 English

Consider the above reaction and predict the major product.

JEE Main 2022 (Online) 26th July Evening Shift
76

The products formed in the following reaction, A and B are

JEE Main 2022 (Online) 26th July Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 96 English

JEE Main 2022 (Online) 26th July Morning Shift
77

What is the major product of the following reaction?

JEE Main 2022 (Online) 25th July Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 97 English

JEE Main 2022 (Online) 25th July Evening Shift
78

$$C{H_3} - C{H_2} - CN\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{Ether}^{C{H_3}MgBr}} A\buildrel {{H_3}{O^ + }} \over \longrightarrow B\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{HCl}^{Zn - Hg}} C$$

The correct structure of C is

JEE Main 2022 (Online) 25th July Evening Shift
79

Which one of the following reactions does not represent correct combination of substrate and product under the given conditions?

JEE Main 2022 (Online) 25th July Morning Shift
80

Consider the given chemical reaction

JEE Main 2022 (Online) 30th June Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 101 English

Identify the product P.

JEE Main 2022 (Online) 30th June Morning Shift
81

Choose the reaction which is not possible:

JEE Main 2022 (Online) 30th June Morning Shift
82

Which among the following will be the major product of the given reaction?

JEE Main 2022 (Online) 30th June Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 102 English

JEE Main 2022 (Online) 30th June Morning Shift
83

Given below are two statements :

Statement I : The esterification of carboxylic acid with an alcohol is a nucleophilic acyl substitution.

Statement II : Electron withdrawing groups in the carboxylic acid will increase the rate of esterification reaction.

Choose the most appropriate option :

JEE Main 2022 (Online) 29th June Morning Shift
84

Isobutyraldehyde on reaction with formaldehyde and K2CO3 gives compound 'A'. Compound 'A' reacts with KCN and yields compound 'B', which on hydrolysis gives a stable compound 'C'. The compound 'C' is

JEE Main 2022 (Online) 28th June Evening Shift
85

The correct structure of product 'A' formed in the following reaction.

JEE Main 2022 (Online) 28th June Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 114 English

is

JEE Main 2022 (Online) 28th June Morning Shift
86

'A' and 'B' respectively are:

JEE Main 2022 (Online) 27th June Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 113 English

JEE Main 2022 (Online) 27th June Morning Shift
87

Which of the following reactions will yield benzaldehyde as a product?

JEE Main 2022 (Online) 27th June Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 112 English 1

JEE Main 2022 (Online) 27th June Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 112 English 2

JEE Main 2022 (Online) 27th June Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 112 English 3

JEE Main 2022 (Online) 27th June Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 112 English 4

JEE Main 2022 (Online) 27th June Morning Shift
88

Oxidation of toluene to benzaldehyde can be easily carried out with which of the following reagents?

JEE Main 2022 (Online) 26th June Evening Shift
89

The reagent, from the following, which converts benzoic acid to benzaldehyde in one step is

JEE Main 2022 (Online) 26th June Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 109 English

JEE Main 2022 (Online) 26th June Evening Shift
90

The final product 'A' in the following reaction sequence

JEE Main 2022 (Online) 26th June Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 108 English

JEE Main 2022 (Online) 26th June Evening Shift
91

(C7H5O2)2 $$\buildrel {hv} \over \longrightarrow $$ [X] $$\to$$ 2C6H5 + 2CO2

Consider the above reaction and identify the intermediate 'X'

JEE Main 2022 (Online) 26th June Morning Shift
92

Which will have the highest enol content?

JEE Main 2022 (Online) 26th June Morning Shift
93

Which of the following conditions or reaction sequence will NOT give acetophenone as the major product?

JEE Main 2022 (Online) 25th June Evening Shift
94

Two statements are given below :

Statement I : The melting point of monocarboxylic acid with even number of carbon atoms is higher than that of with odd number of carbon atoms acid immediately below and above it in the series.

Statement II : The solubility of monocarboxylic acids in water decreases with increase in molar mass.

Choose the most appropriate option :

JEE Main 2022 (Online) 24th June Morning Shift
95
Experimentally reducing a functional group cannot be done by which one of the following reagents?
JEE Main 2021 (Online) 1st September Evening Shift
96
In the following sequence of reactions a compound A, (molecular formula C6H12O2) with a straight chain structure gives a C4 carboxylic acid. A is :

JEE Main 2021 (Online) 1st September Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 118 English
JEE Main 2021 (Online) 1st September Evening Shift
97
Given below are two statements :

Statement I : The nucleophilic addition of sodium hydrogen sulphite to an aldehyde or a ketone involves proton transfer to form a stable ion.

Statement II : The nucleophilic addition of hydrogen cyanide to an aldehyde or a ketone yields amine as final product.

In the light of the above statements, choose the most appropriate answer from the options given below :
JEE Main 2021 (Online) 1st September Evening Shift
98
The structures A and B formed in the following reaction are : [Ph = $$-$$C6H5]

JEE Main 2021 (Online) 31st August Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 122 English
JEE Main 2021 (Online) 31st August Evening Shift
99
For the reaction given below :-

JEE Main 2021 (Online) 31st August Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 119 English

The compound which is not formed as a product in the reaction is a :
JEE Main 2021 (Online) 31st August Evening Shift
100
The structure of product C, formed by the following sequence of reactions is :

JEE Main 2021 (Online) 31st August Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 123 English
JEE Main 2021 (Online) 31st August Morning Shift
101
Given below are two statements :

Statement I : Ethyl pent-4-yn-oate on reaction with CH3MgBr gives a 3$$^\circ$$-alcohol.

Statement II : In this reaction one mole of ethyl pent-4-yn-oate utilizes two moles of CH3MgBr.

In the light of the above statements, choose the most appropriate answer from the options given below :
JEE Main 2021 (Online) 27th August Evening Shift
102
Which one of the following reactions will not yield propionic acid?
JEE Main 2021 (Online) 27th August Evening Shift
103
The structure of the starting compound P used in the reaction given below is :

JEE Main 2021 (Online) 27th August Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 126 English
JEE Main 2021 (Online) 27th August Morning Shift
104
The major products formed in the following reaction sequence A and B are :

JEE Main 2021 (Online) 26th August Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 127 English
JEE Main 2021 (Online) 26th August Morning Shift
105
The correct sequential addition of reagents in the preparation of 3-nitrobenzoic acid from benzene is :
JEE Main 2021 (Online) 26th August Morning Shift
106
Which one of the following compounds will give orange precipitate when treated with 2, 4-dinitrophenyl hydrazine?
JEE Main 2021 (Online) 27th July Morning Shift
107
JEE Main 2021 (Online) 25th July Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 130 English
Maleic anhydride can prepared by :
JEE Main 2021 (Online) 25th July Evening Shift
108
JEE Main 2021 (Online) 25th July Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 131 English
[where $$Et \Rightarrow - {C_2}{H_5}{}^tBu \Rightarrow {(C{H_3})_3}C - $$]

Consider the above reaction sequence, Product "A" and Product "B" formed respectively are :
JEE Main 2021 (Online) 25th July Evening Shift
109
JEE Main 2021 (Online) 25th July Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 132 English
Consider the given reaction, the product 'X' is :
JEE Main 2021 (Online) 25th July Morning Shift
110
Which one of the following compounds will liberate CO2, when treated with NaHCO3 ?
JEE Main 2021 (Online) 25th July Morning Shift
111
The major product (P) in the following reaction is :

JEE Main 2021 (Online) 20th July Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 135 English
JEE Main 2021 (Online) 20th July Evening Shift
112
JEE Main 2021 (Online) 20th July Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 134 English
The correct order of their reactivity towards hydrolysis at room temperature is :
JEE Main 2021 (Online) 20th July Evening Shift
113
JEE Main 2021 (Online) 20th July Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 136 English
Which among the above compound/s does/do not form Silver mirror when treated with Tollen's reagent?
JEE Main 2021 (Online) 20th July Morning Shift
114
JEE Main 2021 (Online) 18th March Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 139 English
Consider the above reaction, the product 'X' and 'Y' respectively are :
JEE Main 2021 (Online) 18th March Evening Shift
115
JEE Main 2021 (Online) 18th March Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 140 English
Consider the above chemical reaction and identify product "A"
JEE Main 2021 (Online) 18th March Morning Shift
116
JEE Main 2021 (Online) 18th March Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 141 English
Considering the above chemical reaction, identify the product "X" :
JEE Main 2021 (Online) 18th March Morning Shift
117
JEE Main 2021 (Online) 17th March Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 143 English
The product ''A'' in the above reaction is :
JEE Main 2021 (Online) 17th March Morning Shift
118
Mesityl oxide is a common name of :
JEE Main 2021 (Online) 17th March Morning Shift
119
JEE Main 2021 (Online) 16th March Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 145 English
In the above reaction, the reagent ''A'' is :
JEE Main 2021 (Online) 16th March Evening Shift
120
JEE Main 2021 (Online) 16th March Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 146 English
The product ''P'' in the above reaction is :
JEE Main 2021 (Online) 16th March Morning Shift
121
Assertion A : Enol form of acetone [CH3COCH3] exists in < 0.1% quantity. However, the enol form of acetyl acetone [CH3COCH2OCCH3] exists in approximately 15% quantity.

Reason R : Enol form of acetyl acetone is stabilized by intramolecular hydrogen bonding, which is not possible in enol form of acetone.

Choose the correct statement :
JEE Main 2021 (Online) 16th March Morning Shift
122
Identify A in the following chemical reaction.

JEE Main 2021 (Online) 26th February Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 151 English
JEE Main 2021 (Online) 26th February Evening Shift
123
2, 4-DNP test can be used to identify :
JEE Main 2021 (Online) 26th February Evening Shift
124
JEE Main 2021 (Online) 26th February Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 150 English
Considering the above reaction, the major product among the following is :
JEE Main 2021 (Online) 26th February Evening Shift
125
Identify A in the given chemical reaction.

JEE Main 2021 (Online) 26th February Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 148 English
JEE Main 2021 (Online) 26th February Evening Shift
126
The major product of the following reaction is :

JEE Main 2021 (Online) 25th February Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 152 English
JEE Main 2021 (Online) 25th February Evening Shift
127
Which one of the following reactions will not form acetaldehyde?
JEE Main 2021 (Online) 25th February Morning Shift
128
Compound(s) which will liberate carbon dioxide with sodium bicarbonate solution is/are :

JEE Main 2021 (Online) 25th February Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 154 English
JEE Main 2021 (Online) 25th February Morning Shift
129
The major product of the following chemical reaction is :

JEE Main 2021 (Online) 25th February Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 155 English
JEE Main 2021 (Online) 25th February Morning Shift
130
Which one of the following carbonyl compounds cannot be prepared by addition of water on an alkyne in the presence of HgSO4 and H2SO4?
JEE Main 2021 (Online) 24th February Evening Shift
131
JEE Main 2021 (Online) 24th February Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 157 English
Which of the following reagent is suitable for the preparation of the product in the above reaction?
JEE Main 2021 (Online) 24th February Evening Shift
132
Match List - I and List - II.

List-I List-II
(a) JEE Main 2021 (Online) 24th February Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 159 English 1 (i) $$\mathrm{Br}_{2} / \mathrm{NaOH}$$
(b) JEE Main 2021 (Online) 24th February Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 159 English 2 (ii) $$\mathrm{H}_{2} / \mathrm{Pd}-\mathrm{BaSO}_{4}$$
(c) JEE Main 2021 (Online) 24th February Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 159 English 3 (iii) $$\mathrm{Zn}(\mathrm{Hg}) / \mathrm{H}$$ Conc. $$\mathrm{HCl}$$
(d) JEE Main 2021 (Online) 24th February Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 159 English 4 (iv) $$\mathrm{Cl}_{2}$$ Red $$\mathrm{P}, \mathrm{H}_{2} \mathrm{O}$$


Choose the correct answer from the options given below :
JEE Main 2021 (Online) 24th February Evening Shift
133
Which of the following reagent is used for the following reaction ?

$$ \mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}_3 \stackrel{?}{\longrightarrow} \mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CHO} $$
JEE Main 2021 (Online) 24th February Morning Shift
134
The correct match between Item-I (starting material) and Item-II (reagent) for the preparation of benzaldehyde is :

Item-I Item-II
(I) Benzene (P) HCl and SnCl2, H3O+
(II) Benzonitrile (Q) H2, Pd-BaSO4, S and quinoline
(III) Benzoyl Chloride (R) CO, HCl and AlCl3
JEE Main 2020 (Online) 6th September Evening Slot
135
The major products of the following reaction are : JEE Main 2020 (Online) 6th September Morning Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 163 English
JEE Main 2020 (Online) 6th September Morning Slot
136
Consider the following reactions JEE Main 2020 (Online) 6th September Morning Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 162 English
'A' is :
JEE Main 2020 (Online) 6th September Morning Slot
137
In the following reaction sequence the major products A and B are : JEE Main 2020 (Online) 5th September Morning Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 166 English
JEE Main 2020 (Online) 5th September Morning Slot
138
The increasing order of the acidity of the $$\alpha $$-hydrogen of the following compounds is : JEE Main 2020 (Online) 5th September Morning Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 165 English
JEE Main 2020 (Online) 5th September Morning Slot
139
Which of the following derivatives of alcohols is unstable in an aqueous base?
JEE Main 2020 (Online) 5th September Morning Slot
140
The major product [C] of the following reaction sequence will be : JEE Main 2020 (Online) 4th September Evening Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 167 English
JEE Main 2020 (Online) 4th September Evening Slot
141
An organic compound (A) (molecular formula C6H12O2) was hydrolysed with dil. H2SO4 to give a carboxylic acid (B) and an alcohol (C). ‘C’ gives white turbidity immediately when treated with anhydrous ZnCl2 and conc. HCl. The organic compound (A) is :
JEE Main 2020 (Online) 4th September Morning Slot
142
[P] on treatment with Br2/FeBr3 in CCl4 produced a single isomer C8H7O2Br while heating [P] with sodalime gave toluene. The compound [P] is
JEE Main 2020 (Online) 4th September Morning Slot
143
Consider the following molecules and statements related to them : JEE Main 2020 (Online) 3rd September Evening Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 170 English
(a) (B) is more likely to be crystalline than (A)
(b) (B) has higher boiling point than (A)
(c) (B) dissolves more readily than (A) in water

Identify the correct option from below :
JEE Main 2020 (Online) 3rd September Evening Slot
144
The compound A in the following reaction is : JEE Main 2020 (Online) 3rd September Evening Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 171 English
JEE Main 2020 (Online) 3rd September Evening Slot
145
The increasing order of the reactivity of the following compound in nucleophilic addition reaction is :

Propanal, Benzaldehyde, Propanone, Butanone
JEE Main 2020 (Online) 3rd September Evening Slot
146
Arrange the following labelled hydrogens in decreasing order of acidity : JEE Main 2020 (Online) 2nd September Evening Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 175 English
JEE Main 2020 (Online) 2nd September Evening Slot
147
Two compounds A and B with same molecular formula (C3H6O) undergo Grignard’s reaction with methylmagnesium bromide to give products C and D. Products C and D show following chemical tests. JEE Main 2020 (Online) 2nd September Evening Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 174 English
C and D respectively are :
JEE Main 2020 (Online) 2nd September Evening Slot
148
The increasing order of the following compounds towards HCN addition is : JEE Main 2020 (Online) 2nd September Morning Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 176 English
JEE Main 2020 (Online) 2nd September Morning Slot
149
In the following reaction A is : JEE Main 2020 (Online) 9th January Evening Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 178 English
JEE Main 2020 (Online) 9th January Evening Slot
150
Identify (A) in the following reaction sequence : JEE Main 2020 (Online) 9th January Morning Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 179 English
JEE Main 2020 (Online) 9th January Morning Slot
151
An unsaturated hydrocarbon X absorbs two hydrogen molecules on catalytic hydrogenation and also gives following reaction : JEE Main 2020 (Online) 8th January Evening Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 180 English B(3 - oxo - hexanedicarboxylic acid) X will be :-
JEE Main 2020 (Online) 8th January Evening Slot
152
The most suitable reagent for the given conversion is : JEE Main 2020 (Online) 8th January Morning Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 182 English
JEE Main 2020 (Online) 8th January Morning Slot
153
The predominant intermolecular forces present in ethyl acetate, a liquid, are:
JEE Main 2020 (Online) 8th January Morning Slot
154
What is the product of following reaction ? JEE Main 2020 (Online) 7th January Morning Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 183 English
JEE Main 2020 (Online) 7th January Morning Slot
155
The major products of the following reaction are : JEE Main 2019 (Online) 12th April Morning Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 185 English
JEE Main 2019 (Online) 12th April Morning Slot
156
The major product(s) obtained in the following reaction is/are :
JEE Main 2019 (Online) 12th April Morning Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 184 English
JEE Main 2019 (Online) 12th April Morning Slot
157
Compound A(C9H10O) shows positive iodoform test. Oxidation of A with KMnO4/KOH given acid B(C8H6O4). Anhydride of B is used for the preparation of phenolphthalein. Compound A is:
JEE Main 2019 (Online) 10th April Evening Slot
158
The major product 'Y' in the following reaction is : JEE Main 2019 (Online) 10th April Evening Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 186 English
JEE Main 2019 (Online) 10th April Evening Slot
159
Major products of the following reaction are : JEE Main 2019 (Online) 10th April Morning Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 188 English
JEE Main 2019 (Online) 10th April Morning Slot
160
In the following reaction JEE Main 2019 (Online) 9th April Evening Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 191 English Rate of the reaction is the highest for :
JEE Main 2019 (Online) 9th April Evening Slot
161
The major product of the following reaction is: JEE Main 2019 (Online) 9th April Evening Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 190 English
JEE Main 2019 (Online) 9th April Evening Slot
162
p-Hydroxybenzophenone upon reaction with bromine in carbon tetrachloride gives:
JEE Main 2019 (Online) 9th April Evening Slot
163
The major product of the following reaction is : JEE Main 2019 (Online) 9th April Morning Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 192 English
JEE Main 2019 (Online) 9th April Morning Slot
164
The major product obtained in the following reaction is JEE Main 2019 (Online) 8th April Evening Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 193 English
JEE Main 2019 (Online) 8th April Evening Slot
165
The major product of the following reaction is : JEE Main 2019 (Online) 8th April Morning Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 195 English
JEE Main 2019 (Online) 8th April Morning Slot
166
The major product of the following reaction is : JEE Main 2019 (Online) 8th April Morning Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 194 English
JEE Main 2019 (Online) 8th April Morning Slot
167
The aldehydes which will not form Grignard product with one equivalent Grignard reagents are -

JEE Main 2019 (Online) 12th January Evening Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 197 English
JEE Main 2019 (Online) 12th January Evening Slot
168
The major product of the following reaction is –

JEE Main 2019 (Online) 12th January Evening Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 196 English
JEE Main 2019 (Online) 12th January Evening Slot
169
In the following reaction, products A and B are –

JEE Main 2019 (Online) 12th January Morning Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 199 English
JEE Main 2019 (Online) 12th January Morning Slot
170
The major product of the following reaction is –

JEE Main 2019 (Online) 12th January Morning Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 198 English
JEE Main 2019 (Online) 12th January Morning Slot
171
In the following reaction :

Aldehyde + Alcohol   $$\buildrel {HCl} \over \longrightarrow $$  Acetal

Aldehyde                    Alcohol
HCHO tBuOH
CH3CHO MeOH

The best combination is
JEE Main 2019 (Online) 12th January Morning Slot
172
The major product obtained in the following reaction is :

JEE Main 2019 (Online) 11th January Evening Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 202 English
JEE Main 2019 (Online) 11th January Evening Slot
173
The major product obtained in the following conversion is JEE Main 2019 (Online) 11th January Evening Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 201 English
JEE Main 2019 (Online) 11th January Evening Slot
174
The major product of the following reaction is :

JEE Main 2019 (Online) 11th January Morning Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 203 English
JEE Main 2019 (Online) 11th January Morning Slot
175
The major product obtained in the following reaction is :

JEE Main 2019 (Online) 10th January Evening Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 205 English
JEE Main 2019 (Online) 10th January Evening Slot
176
Which is the most suitable reagent for the following transformation ?

JEE Main 2019 (Online) 10th January Evening Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 204 English
JEE Main 2019 (Online) 10th January Evening Slot
177
What will be the major product in the following mononitration reaction ?

JEE Main 2019 (Online) 10th January Evening Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 206 English
JEE Main 2019 (Online) 10th January Evening Slot
178
Which dicarboxylic acid in presence of a dehydrating agent is least reactive to give an anhydride?
JEE Main 2019 (Online) 10th January Morning Slot
179
The decreasing order of ease of alkaline hydrolysis for the following esters in

JEE Main 2019 (Online) 10th January Morning Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 207 English
JEE Main 2019 (Online) 10th January Morning Slot
180
The major product in the following reaction is :

JEE Main 2019 (Online) 9th January Evening Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 211 English
JEE Main 2019 (Online) 9th January Evening Slot
181
The major product of the following reaction is :

JEE Main 2019 (Online) 9th January Evening Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 210 English
JEE Main 2019 (Online) 9th January Evening Slot
182
The correct match between Item I and Item II is :

Item - I Item - II
(A) Benzaldehyde (P) Mobile phase
(B) Alumina (Q) Adsorbent
(C) Acetonitrile (R) Adsorbate
JEE Main 2019 (Online) 9th January Evening Slot
183
The products formed in the reaction of cumene with O2 followed by treatment with dil. HCl are :
JEE Main 2019 (Online) 9th January Evening Slot
184
The major product B formed in the following reaction sequence is :

JEE Main 2018 (Online) 16th April Morning Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 216 English
JEE Main 2018 (Online) 16th April Morning Slot
185
The major product of the following reaction is :

JEE Main 2018 (Online) 16th April Morning Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 215 English
JEE Main 2018 (Online) 16th April Morning Slot
186
Which of the following compounds will most readily be dehydrated to give alkene under acidic condition ?
JEE Main 2018 (Online) 16th April Morning Slot
187
The major product formed in the following reaction is :
JEE Main 2018 (Online) 15th April Evening Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 218 English
JEE Main 2018 (Online) 15th April Evening Slot
188
The increasing order of the acidity of the following carboxylic acids is :
JEE Main 2018 (Online) 15th April Evening Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 219 English
JEE Main 2018 (Online) 15th April Evening Slot
189
The reagent(s) required for the following conversion are :

JEE Main 2018 (Online) 15th April Morning Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 220 English
JEE Main 2018 (Online) 15th April Morning Slot
190
The main reduction product of the following compound with NaBH4 in methanol is :

JEE Main 2018 (Online) 15th April Morning Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 221 English
JEE Main 2018 (Online) 15th April Morning Slot
191
A compound of molecular formula C8H8O2 reacts with acetophenone to form a single cross-aldol product in the presence of base. The same compound on reaction with conc. NaOH forms benzyl alcohol as one of the products. The structure of the compound is :
JEE Main 2017 (Online) 9th April Morning Slot
192
The major product obtained in the following reaction is :

JEE Main 2017 (Offline) Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 230 English
JEE Main 2017 (Offline)
193
The correct sequence of reagents for the following conversion will be :

JEE Main 2017 (Offline) Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 231 English
JEE Main 2017 (Offline)
194
The correct statement about the synthesis of erythritol (C(CH2OH)4) used in the preparation of PETN is :
JEE Main 2016 (Online) 10th April Morning Slot
195
Which compound would give $$5$$ - keto - $$2$$ - methylhexanal upon ozonolysis?
JEE Main 2015 (Offline)
196
In the following sequence of reactions:

JEE Main 2015 (Offline) Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 232 English
The product C is
JEE Main 2015 (Offline)
197
Sodium phenoxide when heated with $$C{O_2}$$ under pressure at $${125^ \circ }C$$ yields a product which on acetylation products $$C.$$

JEE Main 2014 (Offline) Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 227 English

The major product $$C$$ would be
JEE Main 2014 (Offline)
198
In the reaction,
JEE Main 2014 (Offline) Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 233 English
the product C is:
JEE Main 2014 (Offline)
199
In the given transformation, which of the following is the most appropriate reagent ?

AIEEE 2012 Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 223 English
AIEEE 2012
200
Sodium ethoxide has reacted with ethanoyl chloride. The compound that is produced in the above reaction is
AIEEE 2011
201
The strongest acid amongst the following compounds is :
AIEEE 2011
202
Trichloroacetaldehyde was subjected to Cannizzaro’s reaction by using NaOH. The mixture of the products contains sodium trichloroacetate and another compound. The other compound is :
AIEEE 2011
203
One mole of a symmetrical alkene on ozonolysis gives two moles of an aldehyde having a molecular mass of 44 u. The alkene is
AIEEE 2010
204
A liquid was mixed with ethanol and a drop of concentrated H2SO4 was added. A compound with a fruity smell was formed. The liquid was :
AIEEE 2009
205
In Cannizzaro reaction given below
2PhCHO $$\buildrel {\mathop {:OH}\limits^{\left( - \right)} } \over \longrightarrow $$ PhCH2OH + $$PhC\mathop O\limits^{..} $$2(-)
the slowest step is :
AIEEE 2009
206
The compound formed as a result of oxidation of ethyl benzene by KMnO4 is :
AIEEE 2007
207
The increasing order of the rate of HCN addition to compounds A – D is
(A) HCHO
(B) CH3COCH3
(C) PhCOCH3
(D) PhCOPh
AIEEE 2006
208
The correct order of increasing acid strength of the compounds

AIEEE 2006 Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 224 English
AIEEE 2006
209
Reaction of cyclohexanone with dimethylamine in the presence of catalytic amount of an acid forms a compound if water during the reaction is continuously removed. The compound formed is generally known as
AIEEE 2005
210
$$p$$-cresol reacts with chloroform in alkaline medium to give the compound A which adds hydrogen cyanide to form, the compound $$B.$$ The latter on acidic hydrolysis gives chiral carboxylic acid. The structure of the carboxylic acid is :
AIEEE 2005
211
Among the following acids which has the lowest pKa value?
AIEEE 2005
212
On mixing ethyl acetate with aqueous sodium chloride, the composition of the resultant solution is
AIEEE 2004
213
Which of the following undergoes reaction with 50% sodium hydroxide solution to give the corresponding alcohol and acid?
AIEEE 2004
214
Which one of the following reduced with zinc and hydrochloric acid to give the corresponding hydrocarbon?
AIEEE 2004
215
When CH2 = CH - COOH is reduced with LiAlH4, the compound obtained will be
AIEEE 2003
216
The reaction of chloroform with alcoholic $$KOH$$ and p-toluidine forms
AIEEE 2003
217
AIEEE 2002 Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 247 English
What is B?
AIEEE 2002
218
AIEEE 2002 Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 226 English
AIEEE 2002
219
Picric acid is :
AIEEE 2002

Numerical

1

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

JEE Main 2025 (Online) 7th April Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 6 English

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

JEE Main 2025 (Online) 7th April Evening Shift
2
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 _______ %.
JEE Main 2025 (Online) 29th January Evening Shift
3

A compound ' $\mathrm{X}^{\prime}$ absorbs 2 moles of hydrogen and ' X ' upon oxidation with $\mathrm{KMnO}_4 \mid \mathrm{H}^{+}$ gives

JEE Main 2025 (Online) 23rd January Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 20 English

The total number of $\sigma$ bonds present in the compound ' $X^{\prime}$ ' is __________.

JEE Main 2025 (Online) 23rd January Evening Shift
4

Two moles of benzaldehyde and one mole of acetone under alkaline conditions using aqueous $$\mathrm{NaOH}$$ after heating gives $$x$$ as the major product. The number of $$\pi$$ bonds in the product $$x$$ is ______.

JEE Main 2024 (Online) 8th April Evening Shift
5

The product C in the following sequence of reactions has ________ $$\pi$$ bonds.

JEE Main 2024 (Online) 5th April Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 30 English

JEE Main 2024 (Online) 5th April Evening Shift
6

In the Claisen-Schmidt reaction to prepare $$351 \mathrm{~g}$$ of dibenzalacetone using $$87 \mathrm{~g}$$ of acetone, the amount of benzaldehyde required is _________ g. (Nearest integer)

JEE Main 2024 (Online) 5th April Evening Shift
7

Vanillin compound obtained from vanilla beans, has total sum of oxygen atoms and $$\pi$$ electrons is __________.

JEE Main 2024 (Online) 4th April Evening Shift
8

The product of the following reaction is P.

JEE Main 2024 (Online) 31st January Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 50 English

The number of hydroxyl groups present in the product P is ________.

JEE Main 2024 (Online) 31st January Morning Shift
9

The total number of 'Sigma' and 'Pi' bonds in 2-formylhex-4-enoic acid is _________.

JEE Main 2024 (Online) 29th January Evening Shift
10

From the compounds given below, number of compounds which give positive Fehling's test is _________.

Benzaldehyde, Acetaldehyde, Acetone, Acetophenone, Methanal, 4nitrobenzaldehyde, cyclohexane carbaldehyde.

JEE Main 2024 (Online) 29th January Morning Shift
11

JEE Main 2023 (Online) 12th April Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 64 English

The value of $$x$$ in compound 'D' is _________.

JEE Main 2023 (Online) 12th April Morning Shift
12

The mass of NH$$_3$$ produced when 131.8 kg of cyclohexanecarbaldehyde undergoes Tollen's test is ________ kg. (Nearest Integer)

Molar Mass of

C = 12g/mol

N = 14g/mol

O = 16g/mol

JEE Main 2023 (Online) 12th April Morning Shift
13

Number of isomeric compounds with molecular formula $$\mathrm{C}_{9} \mathrm{H}_{10} \mathrm{O}$$ which (i) do not dissolve in $$\mathrm{NaOH}$$ (ii) do not dissolve in $$\mathrm{HCl}$$. (iii) do not give orange precipitate with 2,4-DNP (iv) on hydrogenation give identical compound with molecular formula $$\mathrm{C}_{9} \mathrm{H}_{12} \mathrm{O}$$ is ____________.

JEE Main 2023 (Online) 1st February Morning Shift
14
The number of molecules which gives the haloform test among the following molecules is ________.

JEE Main 2023 (Online) 31st January Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 84 English
JEE Main 2023 (Online) 31st January Evening Shift
15

Number of compounds from the following which will not dissolve in cold $\mathrm{NaHCO}_{3}$ and $\mathrm{NaOH}$ solutions but will dissolve in hot $\mathrm{NaOH}$ solution is ________.

JEE Main 2023 (Online) 30th January Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 80 English

JEE Main 2023 (Online) 30th January Evening Shift
16

A trisubstituted compound '$$\mathrm{A}$$', $$\mathrm{C}_{10} \mathrm{H}_{12} \mathrm{O}_{2}$$ gives neutral $$\mathrm{FeCl}_{3}$$ test positive. Treatment of compound 'A' with $$\mathrm{NaOH}$$ and $$\mathrm{CH}_{3} \mathrm{Br}$$ gives $$\mathrm{C}_{11} \mathrm{H}_{14} \mathrm{O}_{2}$$, with hydroiodic acid gives methyl iodide and with hot conc. $$\mathrm{NaOH}$$ gives a compound $$\mathrm{B}, \mathrm{C}_{10} \mathrm{H}_{12} \mathrm{O}_{2}$$. Compound 'A' also decolorises alkaline $$\mathrm{KMnO}_{4}$$. The number of $$\pi$$ bond/s present in the compound '$$\mathrm{A}$$' is _____________.

JEE Main 2023 (Online) 30th January Morning Shift
17

Number of compounds giving (i) red colouration with ceric ammonium nitrate and also (ii) positive iodoform test from the following is ___________

JEE Main 2023 (Online) 25th January Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 75 English

JEE Main 2023 (Online) 25th January Evening Shift
18

The number of stereoisomers formed in a reaction of $$(±)\mathrm{Ph}(\mathrm{C}=\mathrm{O}) \mathrm{C}(\mathrm{OH})(\mathrm{CN}) \mathrm{Ph}$$ with $$\mathrm{HCN}$$ is ___________.

$$\left[\right.$$where $$\mathrm{Ph}$$ is $$-\mathrm{C}_{6} \mathrm{H}_{5}$$]

JEE Main 2022 (Online) 29th July Evening Shift
19

The spin only magnetic moment of the complex present in Fehling's reagent is __________ B.M. (Nearest integer).

JEE Main 2022 (Online) 27th July Evening Shift
20

In the given reaction

JEE Main 2022 (Online) 25th July Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 100 English

The number of chiral carbon/s in product A is ___________.

JEE Main 2022 (Online) 25th July Morning Shift
21

A hydrocarbon 'X' is found to have molar mass of 80. A 10.0 mg of compound 'X' on hydrogenation consumed 8.40 mL of H2 gas (measured at STP). Ozonolysis of compound 'X' yields only formaldehyde and dialdehyde. The total number of fragments/molecules produced from the ozonolysis of compound 'X' is _____________.

JEE Main 2022 (Online) 30th June Morning Shift
22

In the given reaction,

JEE Main 2022 (Online) 29th June Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 116 English

The number of $$\pi$$ electrons present in the product 'P' is _________.

JEE Main 2022 (Online) 29th June Evening Shift
23
In Tollen's test for aldehyde, the overall number of electron(s) transferred to the Tollen's reagent formula [Ag(NH3)2]+ per aldehyde group to form silver mirror is ___________. (Round off to the Nearest Integer).
JEE Main 2021 (Online) 18th March Evening Shift
24
JEE Main 2021 (Online) 18th March Evening Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 138 English
Consider the above reaction where 6.1 g of Benzoic acid is used to get 7.8 g of m-bromo benzoic acid. The percentage yield of the product is __________

(Round off to the Nearest Integer).

[Given : Atomic masses : C : 12.0 u, H : 1.0 u, O : 16.0 u, Br : 80.0 u]
JEE Main 2021 (Online) 18th March Evening Shift
25
The total number of C-C sigma bond/s in mesityl oxide (C6H10O) is __________. (Round off to the Nearest Integer).
JEE Main 2021 (Online) 17th March Evening Shift
26
The number of compound/s given below which contain/s -COOH group is __________. (Integer answer)

(A) Sulphanilic acid

(B) Picric acid

(C) Aspirin

(D) Ascorbic acid
JEE Main 2021 (Online) 25th February Evening Shift
27
Consider the following reactions

JEE Main 2020 (Online) 9th January Evening Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 177 English
The mass percentage of carbon in A is ______.
JEE Main 2020 (Online) 9th January Evening Slot

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