1
JEE Advanced 2026 Paper 1 Online
MCQ (Single Correct Answer)
+3
-1

Considering LiBH4 reduces an ester group to the corresponding alcohol and does not reduce a carboxylic acid group, the correct statement about the major products P, Q, R and S is:

JEE Advanced 2026 Paper 1 Online Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 6 English
A

P & Q are identical, and R & S are diastereomers.

B

P & Q are diastereomers, and R & S are identical.

C

P & Q are diastereomers, and R & S are diastereomers.

D

P & Q are identical, and R & S are identical.

2
JEE Advanced 2026 Paper 1 Online
MCQ (Single Correct Answer)
+4
-1

The List-II contains products obtained from the reaction of compounds in List-I with $O_3$/Zn-$H_2O$ followed by cyclization (via more stable enolate) in the presence of aqueous NaOH. Match each entry in List-I with appropriate entry in List-II and choose the correct option.

List-I List-II
(P)

JEE Advanced 2026 Paper 1 Online Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 2 English 1
(1)

JEE Advanced 2026 Paper 1 Online Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 2 English 2
(Q)

JEE Advanced 2026 Paper 1 Online Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 2 English 3
(2)

JEE Advanced 2026 Paper 1 Online Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 2 English 4
(R)

JEE Advanced 2026 Paper 1 Online Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 2 English 5
(3)

JEE Advanced 2026 Paper 1 Online Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 2 English 6
(S)

JEE Advanced 2026 Paper 1 Online Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 2 English 7
(4)

JEE Advanced 2026 Paper 1 Online Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 2 English 8
(5)

JEE Advanced 2026 Paper 1 Online Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 2 English 9
A

P $\rightarrow$ 2; Q $\rightarrow$ 4; R $\rightarrow$ 1; S $\rightarrow$ 3

B

P $\rightarrow$ 3; Q $\rightarrow$ 4; R $\rightarrow$ 5; S $\rightarrow$ 2

C

P $\rightarrow$ 2; Q $\rightarrow$ 1; R $\rightarrow$ 5; S $\rightarrow$ 3

D

P $\rightarrow$ 3; Q $\rightarrow$ 5; R $\rightarrow$ 4; S $\rightarrow$ 2

3
JEE Advanced 2026 Paper 1 Online
MCQ (Single Correct Answer)
+4
-1

Match the major products obtained in the reactions given in List-I with the corresponding structures in List-II and choose the correct option.

List-I List-II
(P)

JEE Advanced 2026 Paper 1 Online Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 1 English 1
(1)

JEE Advanced 2026 Paper 1 Online Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 1 English 2
(Q)

JEE Advanced 2026 Paper 1 Online Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 1 English 3
(2)

JEE Advanced 2026 Paper 1 Online Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 1 English 4
(R)

JEE Advanced 2026 Paper 1 Online Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 1 English 5
(3)

JEE Advanced 2026 Paper 1 Online Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 1 English 6
(S)

JEE Advanced 2026 Paper 1 Online Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 1 English 7
(4)

JEE Advanced 2026 Paper 1 Online Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 1 English 8
(5)

JEE Advanced 2026 Paper 1 Online Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 1 English 9
A

P $\rightarrow$ 2; Q $\rightarrow$ 1; R $\rightarrow$ 5; S $\rightarrow$ 4

B

P $\rightarrow$ 1; Q $\rightarrow$ 2; R $\rightarrow$ 4; S $\rightarrow$ 5

C

P $\rightarrow$ 1; Q $\rightarrow$ 2; R $\rightarrow$ 3; S $\rightarrow$ 4

D

P $\rightarrow$ 2; Q $\rightarrow$ 1; R $\rightarrow$ 3; S $\rightarrow$ 5

4
JEE Advanced 2025 Paper 2 Online
MCQ (Single Correct Answer)
+3
-1
Change Language

Monocyclic compounds $\mathbf{P}, \mathbf{Q}, \mathbf{R}$ and $\mathbf{S}$ are the major products formed in the reaction sequences given below.

JEE Advanced 2025 Paper 2 Online Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 9 English 1 JEE Advanced 2025 Paper 2 Online Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 9 English 2

The product having the highest number of unsaturated carbon atom(s) is :

A

P

B

Q

C

R

D

S

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