Aldehydes, Ketones and Carboxylic Acids: JEE Mains Previous Year Questions (2021-2024) | Chemistry for JEE Main & Advanced PDF Download

 Page 1


 
 
 
2024 
 
Q1 - 2024 (01 Feb Shift 1) 
Match List - I with List -II.  
List - I (Reactions) List - II (Reagents) 
(A) 
 
(I) CH
3
MgBr,H
2
O 
(B) C
6
H
5
COC
6
H
5
? C
6
H
5
CH
2
C
6
H
5
 (II) Zn(Hg) and conc. 
HCl 
(C) C
6
H
5
CHO ?C
6
H
5
CH(OH)CH
3
 (III) NaBH
4
,H
+
 
(D) 
 
(IV) 
DIBAL
-H, 
H 2O 
 
 
Choose the correct answer from options given below: 
(1) A-(III), (B)-(IV), (C)-(I), (D)-(II) 
(2) A-(IV), (B)-(II), (C)-(I), (D)-(III) 
(3) A-(IV), (B)-(II), (C)-(III), (D)-(I) 
(4) A-(III), (B)-(IV), (C)-(II), (D)-(I) 
 
Q2 - 2024 (29 Jan Shift 1) 
From the compounds given below, number of compounds which give positive Fehling's 
test is _______. 
Benzaldehyde, Acetaldehyde, Acetone, Acetophenone,Methanal, 4-nitrobenzaldehyde, 
cyclohexane carbaldehyde. 
 
Q3 - 2024 (29 Jan Shift 2) 
Identify the reagents used for the following conversion 
Page 2


 
 
 
2024 
 
Q1 - 2024 (01 Feb Shift 1) 
Match List - I with List -II.  
List - I (Reactions) List - II (Reagents) 
(A) 
 
(I) CH
3
MgBr,H
2
O 
(B) C
6
H
5
COC
6
H
5
? C
6
H
5
CH
2
C
6
H
5
 (II) Zn(Hg) and conc. 
HCl 
(C) C
6
H
5
CHO ?C
6
H
5
CH(OH)CH
3
 (III) NaBH
4
,H
+
 
(D) 
 
(IV) 
DIBAL
-H, 
H 2O 
 
 
Choose the correct answer from options given below: 
(1) A-(III), (B)-(IV), (C)-(I), (D)-(II) 
(2) A-(IV), (B)-(II), (C)-(I), (D)-(III) 
(3) A-(IV), (B)-(II), (C)-(III), (D)-(I) 
(4) A-(III), (B)-(IV), (C)-(II), (D)-(I) 
 
Q2 - 2024 (29 Jan Shift 1) 
From the compounds given below, number of compounds which give positive Fehling's 
test is _______. 
Benzaldehyde, Acetaldehyde, Acetone, Acetophenone,Methanal, 4-nitrobenzaldehyde, 
cyclohexane carbaldehyde. 
 
Q3 - 2024 (29 Jan Shift 2) 
Identify the reagents used for the following conversion 
 
(1) A=LiAlH
4
,B =NaOH
(aq)
,C= NH
2
-NH
2
/KOH, ethylene glycol 
(2) A=LiAlH
4
,B =NaOH
(alc )
,C=Zn/HCl 
(3) A= DIBAL-H, B =NaOH
(aq)
, C =NH
2
-NH
2
/KOH, ethylene glycol 
(4) A =DIBAL -H,B =NaOH
(alc)
,C =Zn/HCl 
 
Q4 - 2024 (30 Jan Shift 1) 
This reduction reaction is known as: 
(1) Rosenmund reduction 
(2) Wolff-Kishner reduction 
(3) Stephen reduction 
(4) Etard reduction 
 
Q5 - 2024 (30 Jan Shift 1) 
The compound formed by the reaction of ethanal with semicarbazide contains ____ 
number of nitrogen atoms. 
 
Q6 - 2024 (30 Jan Shift 2) 
m-chlorobenzaldehyde on treatment with 50%KOH solution yields 
Page 3


 
 
 
2024 
 
Q1 - 2024 (01 Feb Shift 1) 
Match List - I with List -II.  
List - I (Reactions) List - II (Reagents) 
(A) 
 
(I) CH
3
MgBr,H
2
O 
(B) C
6
H
5
COC
6
H
5
? C
6
H
5
CH
2
C
6
H
5
 (II) Zn(Hg) and conc. 
HCl 
(C) C
6
H
5
CHO ?C
6
H
5
CH(OH)CH
3
 (III) NaBH
4
,H
+
 
(D) 
 
(IV) 
DIBAL
-H, 
H 2O 
 
 
Choose the correct answer from options given below: 
(1) A-(III), (B)-(IV), (C)-(I), (D)-(II) 
(2) A-(IV), (B)-(II), (C)-(I), (D)-(III) 
(3) A-(IV), (B)-(II), (C)-(III), (D)-(I) 
(4) A-(III), (B)-(IV), (C)-(II), (D)-(I) 
 
Q2 - 2024 (29 Jan Shift 1) 
From the compounds given below, number of compounds which give positive Fehling's 
test is _______. 
Benzaldehyde, Acetaldehyde, Acetone, Acetophenone,Methanal, 4-nitrobenzaldehyde, 
cyclohexane carbaldehyde. 
 
Q3 - 2024 (29 Jan Shift 2) 
Identify the reagents used for the following conversion 
 
(1) A=LiAlH
4
,B =NaOH
(aq)
,C= NH
2
-NH
2
/KOH, ethylene glycol 
(2) A=LiAlH
4
,B =NaOH
(alc )
,C=Zn/HCl 
(3) A= DIBAL-H, B =NaOH
(aq)
, C =NH
2
-NH
2
/KOH, ethylene glycol 
(4) A =DIBAL -H,B =NaOH
(alc)
,C =Zn/HCl 
 
Q4 - 2024 (30 Jan Shift 1) 
This reduction reaction is known as: 
(1) Rosenmund reduction 
(2) Wolff-Kishner reduction 
(3) Stephen reduction 
(4) Etard reduction 
 
Q5 - 2024 (30 Jan Shift 1) 
The compound formed by the reaction of ethanal with semicarbazide contains ____ 
number of nitrogen atoms. 
 
Q6 - 2024 (30 Jan Shift 2) 
m-chlorobenzaldehyde on treatment with 50%KOH solution yields 
 
 
 
 
Q7 - 2024 (31 Jan Shift 1) 
The product of the following reaction is ?? . 
Page 4


 
 
 
2024 
 
Q1 - 2024 (01 Feb Shift 1) 
Match List - I with List -II.  
List - I (Reactions) List - II (Reagents) 
(A) 
 
(I) CH
3
MgBr,H
2
O 
(B) C
6
H
5
COC
6
H
5
? C
6
H
5
CH
2
C
6
H
5
 (II) Zn(Hg) and conc. 
HCl 
(C) C
6
H
5
CHO ?C
6
H
5
CH(OH)CH
3
 (III) NaBH
4
,H
+
 
(D) 
 
(IV) 
DIBAL
-H, 
H 2O 
 
 
Choose the correct answer from options given below: 
(1) A-(III), (B)-(IV), (C)-(I), (D)-(II) 
(2) A-(IV), (B)-(II), (C)-(I), (D)-(III) 
(3) A-(IV), (B)-(II), (C)-(III), (D)-(I) 
(4) A-(III), (B)-(IV), (C)-(II), (D)-(I) 
 
Q2 - 2024 (29 Jan Shift 1) 
From the compounds given below, number of compounds which give positive Fehling's 
test is _______. 
Benzaldehyde, Acetaldehyde, Acetone, Acetophenone,Methanal, 4-nitrobenzaldehyde, 
cyclohexane carbaldehyde. 
 
Q3 - 2024 (29 Jan Shift 2) 
Identify the reagents used for the following conversion 
 
(1) A=LiAlH
4
,B =NaOH
(aq)
,C= NH
2
-NH
2
/KOH, ethylene glycol 
(2) A=LiAlH
4
,B =NaOH
(alc )
,C=Zn/HCl 
(3) A= DIBAL-H, B =NaOH
(aq)
, C =NH
2
-NH
2
/KOH, ethylene glycol 
(4) A =DIBAL -H,B =NaOH
(alc)
,C =Zn/HCl 
 
Q4 - 2024 (30 Jan Shift 1) 
This reduction reaction is known as: 
(1) Rosenmund reduction 
(2) Wolff-Kishner reduction 
(3) Stephen reduction 
(4) Etard reduction 
 
Q5 - 2024 (30 Jan Shift 1) 
The compound formed by the reaction of ethanal with semicarbazide contains ____ 
number of nitrogen atoms. 
 
Q6 - 2024 (30 Jan Shift 2) 
m-chlorobenzaldehyde on treatment with 50%KOH solution yields 
 
 
 
 
Q7 - 2024 (31 Jan Shift 1) 
The product of the following reaction is ?? . 
 
The number of hydroxyl groups present in the product ?? is 
 
Q8 - 2024 (31 Jan Shift 2) 
Identify the name reaction. 
 
(1) Stephen reaction 
(2) Etard reaction 
(3) Gatterman-koch reaction 
(4) Rosenmund reduction 
 
Q9 - 2024 (31 Jan Shift 2) 
Identify major product ' P ' formed in the following reaction. 
 
 
Page 5


 
 
 
2024 
 
Q1 - 2024 (01 Feb Shift 1) 
Match List - I with List -II.  
List - I (Reactions) List - II (Reagents) 
(A) 
 
(I) CH
3
MgBr,H
2
O 
(B) C
6
H
5
COC
6
H
5
? C
6
H
5
CH
2
C
6
H
5
 (II) Zn(Hg) and conc. 
HCl 
(C) C
6
H
5
CHO ?C
6
H
5
CH(OH)CH
3
 (III) NaBH
4
,H
+
 
(D) 
 
(IV) 
DIBAL
-H, 
H 2O 
 
 
Choose the correct answer from options given below: 
(1) A-(III), (B)-(IV), (C)-(I), (D)-(II) 
(2) A-(IV), (B)-(II), (C)-(I), (D)-(III) 
(3) A-(IV), (B)-(II), (C)-(III), (D)-(I) 
(4) A-(III), (B)-(IV), (C)-(II), (D)-(I) 
 
Q2 - 2024 (29 Jan Shift 1) 
From the compounds given below, number of compounds which give positive Fehling's 
test is _______. 
Benzaldehyde, Acetaldehyde, Acetone, Acetophenone,Methanal, 4-nitrobenzaldehyde, 
cyclohexane carbaldehyde. 
 
Q3 - 2024 (29 Jan Shift 2) 
Identify the reagents used for the following conversion 
 
(1) A=LiAlH
4
,B =NaOH
(aq)
,C= NH
2
-NH
2
/KOH, ethylene glycol 
(2) A=LiAlH
4
,B =NaOH
(alc )
,C=Zn/HCl 
(3) A= DIBAL-H, B =NaOH
(aq)
, C =NH
2
-NH
2
/KOH, ethylene glycol 
(4) A =DIBAL -H,B =NaOH
(alc)
,C =Zn/HCl 
 
Q4 - 2024 (30 Jan Shift 1) 
This reduction reaction is known as: 
(1) Rosenmund reduction 
(2) Wolff-Kishner reduction 
(3) Stephen reduction 
(4) Etard reduction 
 
Q5 - 2024 (30 Jan Shift 1) 
The compound formed by the reaction of ethanal with semicarbazide contains ____ 
number of nitrogen atoms. 
 
Q6 - 2024 (30 Jan Shift 2) 
m-chlorobenzaldehyde on treatment with 50%KOH solution yields 
 
 
 
 
Q7 - 2024 (31 Jan Shift 1) 
The product of the following reaction is ?? . 
 
The number of hydroxyl groups present in the product ?? is 
 
Q8 - 2024 (31 Jan Shift 2) 
Identify the name reaction. 
 
(1) Stephen reaction 
(2) Etard reaction 
(3) Gatterman-koch reaction 
(4) Rosenmund reduction 
 
Q9 - 2024 (31 Jan Shift 2) 
Identify major product ' P ' formed in the following reaction. 
 
 
 
 
Q10 - 2024 (31 Jan Shift 2) 
The azo-dye (Y) formed in the following reactions is Sulphanilic acid +NaNO
2
+
CH
3
COOH ?X 
 
(1)