Aldehydes, Ketones and Carboxylic Acids
365 Questions
Start JEE Mains Test
2021
Q201
JEE Mains
MCQ
14 Mar 2026
Which one of the following reactions will not form acetaldehyde?
A.
$C{H_3}C{H_2}OH\mathrel{\mathop{\kern0pt\longrightarrow}
\limits_{573K}^{Cu}} $
B.
$C{H_3}C{H_2}OH\buildrel {Cr{O_3} - {H_2}S{O_4}} \over
\longrightarrow $
C.
$C{H_2} = C{H_2} + {O_2}\mathrel{\mathop{\kern0pt\longrightarrow}
\limits_{{H_2}O}^{Pd(II)/Cu(II)}} $
D.
$C{H_3}CN\mathrel{\mathop{\kern0pt\longrightarrow}
\limits_{ii)\,{H_2}O}^{i)\,DIBAL - H}} $
2021
Q202
JEE Mains
MCQ
14 Mar 2026
Compound(s) which will liberate carbon dioxide with sodium bicarbonate solution is/are :
A.
C only
B.
B only
C.
B and C only
D.
A and B only
2021
Q203
JEE Mains
MCQ
14 Mar 2026
The major product of the following chemical reaction is :
A.
$C{H_3}C{H_2}CHO$
B.
$C{H_3}C{H_2}C{H_3}$
C.
$C{H_3}C{H_2}C{H_2}OH$
D.
${(C{H_3}C{H_2}CO)_2}O$
2021
Q204
JEE Mains
MCQ
14 Mar 2026
Which one of the following carbonyl compounds cannot be prepared by addition of water on an alkyne in the presence of HgSO4 and H2SO4?
A.
B.
C.
D.
2021
Q205
JEE Mains
MCQ
14 Mar 2026
Which of the following reagent is suitable for the preparation of the product in the above reaction?
A.
Red P + Cl2
B.
$N{H_2} - N{H_2}/{C_2}{H_5}\mathop O\limits^\Theta \mathop N\limits^ \oplus a$
C.
NaBH4
D.
Ni/H2
2021
Q206
JEE Mains
MCQ
14 Mar 2026
Match List - I and List - II.
Choose the correct answer from the options given below :
| List-I | List-II | ||
|---|---|---|---|
| (a) |  |
(i) | $\mathrm{Br}_{2} / \mathrm{NaOH}$ |
| (b) |  |
(ii) | $\mathrm{H}_{2} / \mathrm{Pd}-\mathrm{BaSO}_{4}$ |
| (c) |  |
(iii) | $\mathrm{Zn}(\mathrm{Hg}) / \mathrm{H}$ Conc. $\mathrm{HCl}$ |
| (d) |  |
(iv) | $\mathrm{Cl}_{2}$ Red $\mathrm{P}, \mathrm{H}_{2} \mathrm{O}$ |
Choose the correct answer from the options given below :
A.
(a)-(ii), (b)-(iv), (c)-(i), (d)-(iii)
B.
(a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)
C.
(a)-(iii), (b)-(i), (c)-(iv), (d)-(ii)
D.
(a)-(ii), (b)-(i), (c)-(iv), (d)-(iii)
2021
Q207
JEE Mains
MCQ
14 Mar 2026
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} $
$ \mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}_3 \stackrel{?}{\longrightarrow} \mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CHO} $
A.
Molybdenum oxide
B.
Manganese acetate
C.
Copper at high temperature and pressure
D.
Potassium permanganate
2021
Q208
JEE Mains
Numerical
14 Mar 2026
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).
Correct Answer: 2
Explanation:
Total 2e- transfer to Tollen's reagent.
2021
Q209
JEE Mains
Numerical
14 Mar 2026
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]
Correct Answer: 78
Explanation:
Moles of Benzoic acid = ${{6.1} \over {122}}$ = moles of m-bromobenzoic acid
So, weight of m-bromobenzoic acid = ${{6.1} \over {122}}$ $\times$ 201 gm
= 10.05 gm
% yield = ${{Actual\,weight} \over {Theoretical\,weight}} \times 100$
$ = {{7.8} \over {10.05}} \times 100$ = 77.61%
So, weight of m-bromobenzoic acid = ${{6.1} \over {122}}$ $\times$ 201 gm
= 10.05 gm
% yield = ${{Actual\,weight} \over {Theoretical\,weight}} \times 100$
$ = {{7.8} \over {10.05}} \times 100$ = 77.61%
2021
Q210
JEE Mains
Numerical
14 Mar 2026
The total number of C-C sigma bond/s in mesityl oxide (C6H10O) is __________. (Round off to the Nearest Integer).
Correct Answer: 5
Explanation:
Structure of mesityl oxide is
Number of C–C sigma bonds = 5
Number of C–C sigma bonds = 5
2021
Q211
JEE Mains
Numerical
14 Mar 2026
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
(A) Sulphanilic acid
(B) Picric acid
(C) Aspirin
(D) Ascorbic acid
Correct Answer: 1
Explanation:
The structures of the given compounds are
(A) Sulphanilic acid
(B) Picric acid
(C) Aspirin
(D) Ascorbic Acid
$ \therefore $ Only 1 compound has –COOH group
(A) Sulphanilic acid
(B) Picric acid
(C) Aspirin
(D) Ascorbic Acid
$ \therefore $ Only 1 compound has –COOH group
2021
Q212
JEE Advanced
Numerical
14 Mar 2026
In the reaction given below, the total number of atoms having sp2 hybridization in the major product P is _________.
Correct Answer: 8OR12
Explanation:
Alkene on treatment with ozone (O3) followed by
treatment with Zn/H2O gives carbonyl compounds.
Carbonyl compounds react with NH2OH to give oximes.
There are four sp2-carbon atoms, four sp2-nitrogen atoms and four sp2-oxygen atoms as shown in structures I and II.
Therefore, total number of atoms having sp2-hybridisation are twelve (12).
2020
Q213
JEE Mains
MCQ
14 Mar 2026
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 |
A.
(I) - (R), (II) - (P) and (III) - (Q)
B.
(I) - (P), (II) - (Q) and (III) - (R)
C.
(I) - (Q), (II) - (R) and (III) - (P)
D.
(I) - (R), (II) - (Q) and (III) - (P)
2020
Q214
JEE Mains
MCQ
14 Mar 2026
The major products of the following reaction are :
A.
B.
C.
D.
2020
Q215
JEE Mains
MCQ
14 Mar 2026
Consider the following reactions
'A' is :
'A' is :
A.
B.
C.
D.
2020
Q216
JEE Mains
MCQ
14 Mar 2026
The increasing order of the acidity of the $\alpha $-hydrogen of the following compounds is :
A.
(C) < (A) < (B) < (D)
B.
(B) < (C) < (A) < (D)
C.
(A) < (C) < (D) < (B)
D.
(D) < (C) < (A) < (B)
2020
Q217
JEE Mains
MCQ
14 Mar 2026
In the following reaction sequence the major
products A and B are :
A.
B.
C.
D.
2020
Q218
JEE Mains
MCQ
14 Mar 2026
Which of the following derivatives of alcohols
is unstable in an aqueous base?
A.
RO—CMe3
B.
C.
D.
2020
Q219
JEE Mains
MCQ
14 Mar 2026
The major product [C] of the following reaction
sequence will be :
A.
B.
C.
D.
2020
Q220
JEE Mains
MCQ
14 Mar 2026
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 :
A.
B.
C.
D.
2020
Q221
JEE Mains
MCQ
14 Mar 2026
[P] on treatment with Br2/FeBr3 in CCl4
produced a single isomer C8H7O2Br while
heating [P] with sodalime gave toluene. The
compound [P] is
A.
B.
C.
D.
2020
Q222
JEE Mains
MCQ
14 Mar 2026
Consider the following molecules and
statements related to them :
(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 :
(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 :
A.
only (a) is true
B.
(a), (b) and (c) are true
C.
(b) and (c) are true
D.
(a) and (b) are true
2020
Q223
JEE Mains
MCQ
14 Mar 2026
The compound A in the following reaction is :
A.
B.
C.
D.
2020
Q224
JEE Mains
MCQ
14 Mar 2026
The increasing order of the reactivity of the
following compound in nucleophilic addition
reaction is :
Propanal, Benzaldehyde, Propanone, Butanone
Propanal, Benzaldehyde, Propanone, Butanone
A.
Butanone < Propanone < Benzaldehyde <
Propanal
B.
Benzaldehyde < Butanone < Propanone <
Propanal
C.
Propanal < Propanone < Butanone <
Benzaldehyde
D.
Benzaldehyde < Propanal < Propanone <
Butanone
2020
Q225
JEE Mains
MCQ
14 Mar 2026
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.
C and D respectively are :
C and D respectively are :
A.
B.
C.
D.
2020
Q226
JEE Mains
MCQ
14 Mar 2026
Arrange the following labelled hydrogens in
decreasing order of acidity :
A.
b > c > d > a
B.
b > a > c > d
C.
c > b > d > a
D.
c > b > a > d
2020
Q227
JEE Mains
MCQ
14 Mar 2026
The increasing order of the following
compounds towards HCN addition is :
A.
(iii) < (iv) < (ii) < (i)
B.
(i) < (iii) < (iv) < (ii)
C.
(iii) < (i) < (iv) < (ii)
D.
(iii) < (iv) < (i) < (ii)
2020
Q228
JEE Mains
MCQ
14 Mar 2026
In the following reaction A is :
A.
B.
C.
D.
2020
Q229
JEE Mains
MCQ
14 Mar 2026
Identify (A) in the following reaction sequence :
A.
B.
C.
D.
2020
Q230
JEE Mains
MCQ
14 Mar 2026
An unsaturated hydrocarbon X absorbs two
hydrogen molecules on catalytic hydrogenation and also gives following reaction :
B(3 - oxo - hexanedicarboxylic acid) X will be :-
B(3 - oxo - hexanedicarboxylic acid) X will be :-
A.
B.
C.
D.
2020
Q231
JEE Mains
MCQ
14 Mar 2026
The most suitable reagent for the given conversion is :
A.
LiAlH4
B.
B2H6
C.
NaBH4
D.
H2/Pd
2020
Q232
JEE Mains
MCQ
14 Mar 2026
The predominant intermolecular forces present in ethyl acetate, a liquid, are:
A.
Dipole-dipole and hydrogen bonding
B.
hydrogen bonding and London dispersion
C.
London dispersion, dipole-dipole and hydrogen bonding
D.
London dispersion and dipole-dipole
2020
Q233
JEE Mains
MCQ
14 Mar 2026
What is the product of following reaction ?
A.
B.
C.
D.
2020
Q234
JEE Mains
Numerical
14 Mar 2026
Consider the following reactions
The mass percentage of carbon in A is ______.
The mass percentage of carbon in A is ______.
Correct Answer: 66.66TO66.67
Explanation:
% carbon = ${{48} \over {72}} \times 100$ = 66.67
2020
Q235
JEE Mains
MSQ
14 Mar 2026
An organic compound [A], molecular formula C10H20O2
was hydrolyzed with dilute sulphuric acid to
give a carboxylic acid [B] and an alcohol [C]. Oxidation of [C] with
CrO3 - H2SO4 produced [B]. Which of the following strucutres are not possible for [A]?
CrO3 - H2SO4 produced [B]. Which of the following strucutres are not possible for [A]?
A.
(CH3)3 – C – COOCH2C(CH3)3
B.
CH3CH2CH2COOCH2CH2CH2CH3
C.
D.
2020
Q236
JEE Advanced
Numerical
14 Mar 2026
In the following reaction, compound Q is obtained from compound P via an ionic intermediate
What is the degree of unsaturation of Q?
What is the degree of unsaturation of Q?
Correct Answer: 18
Explanation:
Compound (P) on treatment with concentrated H2SO4, gives intermediate compound, on delocalisation, gives a coloured compound Q.
Number of rings = 4 + 1 = 5
$\pi $-bonds = 4 $ \times $ 3 + 1 = 13
Thus, the degree of unsaturation of Q is 18.
Number of rings = 4 + 1 = 5
$\pi $-bonds = 4 $ \times $ 3 + 1 = 13
Thus, the degree of unsaturation of Q is 18.
2020
Q237
JEE Advanced
MSQ
14 Mar 2026
In the reaction scheme shown below Q, R and S are the major products.
The correct structure of
The correct structure of
A.
S is
B.
Q is
C.
R is
D.
S is
2019
Q238
JEE Mains
MCQ
14 Mar 2026
The major products of the following reaction are :
A.
B.
C.
D.
2019
Q239
JEE Mains
MCQ
14 Mar 2026
The major product(s) obtained in the following reaction is/are :
A.
B.
C.
D.
2019
Q240
JEE Mains
MCQ
14 Mar 2026
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:
A.
B.
C.
D.
2019
Q241
JEE Mains
MCQ
14 Mar 2026
The major product 'Y' in the following reaction is :
A.
B.
C.
D.
2019
Q242
JEE Mains
MCQ
14 Mar 2026
Major products of the following reaction are :
A.
B.
C.
D.
CH3OH and HCO2H
2019
Q243
JEE Mains
MCQ
14 Mar 2026
p-Hydroxybenzophenone upon reaction with
bromine in carbon tetrachloride gives:
A.
B.
C.
D.
2019
Q244
JEE Mains
MCQ
14 Mar 2026
The major product of the following reaction is:
A.
B.
C.
D.
2019
Q245
JEE Mains
MCQ
14 Mar 2026
In the following reaction
A.
Propanal as substrate and methanol in
stoichiometric amount.
B.
Acetone as substrate and methanol in
stoichiometric amount
C.
Propanal as substrate and methanol in
excess
D.
Acetone as substrate and methanol in excess
2019
Q246
JEE Mains
MCQ
14 Mar 2026
The major product of the following reaction is :
A.
B.
C.
D.
2019
Q247
JEE Mains
MCQ
14 Mar 2026
The major product obtained in the following
reaction is
A.
B.
C.
D.
2019
Q248
JEE Mains
MCQ
14 Mar 2026
The major product of the following reaction is :
A.
B.
C.
D.
2019
Q249
JEE Mains
MCQ
14 Mar 2026
The major product of the following reaction is :
A.
B.
C.
D.
2019
Q250
JEE Mains
MCQ
14 Mar 2026
The aldehydes which will not form Grignard product with one equivalent Grignard reagents are -
A.
B and D
B.
C and D
C.
B, C and D
D.
B and C
