Aldehydes, Ketones and Carboxylic Acids
283 Questions
Start JEE Mains Test
2022
Q151
JEE Mains
Numerical
14 Mar 2026
In the given reaction,
The number of $\pi$ electrons present in the product 'P' is _________.
Correct Answer: 4
Explanation:
2021
Q152
JEE Mains
MCQ
14 Mar 2026
Experimentally reducing a functional group cannot be done by which one of the following reagents?
A.
Pt-C/H2
B.
Na/H2
C.
Pd-C/H2
D.
Zn/H2O
2021
Q153
JEE Mains
MCQ
14 Mar 2026
In the following sequence of reactions a compound A, (molecular formula C6H12O2) with a straight chain structure gives a C4 carboxylic acid. A is :
A.
$C{H_3} - C{H_2} - COO - C{H_2} - C{H_2} - C{H_3}$
B.
C.
$C{H_3} - C{H_2} - C{H_2} - COO - C{H_2} - C{H_3}$
D.
$C{H_3} - C{H_2} - C{H_2} - O - CH = CH - C{H_2} - OH$
2021
Q154
JEE Mains
MCQ
14 Mar 2026
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 :
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 :
A.
Both Statement I and Statement are true.
B.
Statement I is true but Statement II is false.
C.
Statement I is false but Statement II is true.
D.
Both Statement I and Statement II are false.
2021
Q155
JEE Mains
MCQ
14 Mar 2026
The structures A and B formed in the following reaction are : [Ph = $-$C6H5]
A.
B.
C.
D.
2021
Q156
JEE Mains
MCQ
14 Mar 2026
For the reaction given below :-
The compound which is not formed as a product in the reaction is a :
The compound which is not formed as a product in the reaction is a :
A.
compound with both alcohol and acid functional groups
B.
monocarboxylic acid
C.
dicarboxylic acid
D.
diol
2021
Q157
JEE Mains
MCQ
14 Mar 2026
The structure of product C, formed by the following sequence of reactions is :
A.
B.
C.
D.
2021
Q158
JEE Mains
MCQ
14 Mar 2026
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 :
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 :
A.
Both Statement I and Statement II are false.
B.
Statement I is false but Statement II is true.
C.
Statement I is true but Statement II is false.
D.
Both Statement I and Statement II are true.
2021
Q159
JEE Mains
MCQ
14 Mar 2026
Which one of the following reactions will not yield propionic acid?
A.
CH3CH2COCH3 + OI$-$/H3O+
B.
CH3CH2CH3 + KMnO4(Heat), OH$-$/H3O+
C.
CH3CH2CCl3 + OH$-$/H3O+
D.
CH3CH2CH2Br + Mg, CO2 dry ether/H3O+
2021
Q160
JEE Mains
MCQ
14 Mar 2026
The structure of the starting compound P used in the reaction given below is :
A.
B.
C.
D.
2021
Q161
JEE Mains
MCQ
14 Mar 2026
The major products formed in the following reaction sequence A and B are :
A.
B.
C.
D.
2021
Q162
JEE Mains
MCQ
14 Mar 2026
The correct sequential addition of reagents in the preparation of 3-nitrobenzoic acid from benzene is :
A.
Br2/AlBr3, HNO3/H2SO4, Mg/ether, CO2, H3O+
B.
Br2/AlBr3, NaCN, H3O+, HNO3/H2SO4
C.
Br2/AlBr3, HNO3/H2SO4, NaCN, H3O+
D.
HNO3/H2SO4, Br2/AlBr3, Mg/ether, CO2, H3O+
2021
Q163
JEE Mains
MCQ
14 Mar 2026
Which one of the following compounds will give orange precipitate when treated with 2, 4-dinitrophenyl hydrazine?
A.
B.
C.
D.
2021
Q164
JEE Mains
MCQ
14 Mar 2026
Maleic anhydride can prepared by :
A.
Heating trans-but-2-enedioic acid
B.
Heating cis-but-2-enedioic acid
C.
Treating cis-but-2-enedioic acid with alcohol and acid
D.
Treating trans-but-2-enedioic acid with alcohol and acid
2021
Q165
JEE Mains
MCQ
14 Mar 2026
[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 :
A.
B.
C.
D.
2021
Q166
JEE Mains
MCQ
14 Mar 2026
Consider the given reaction, the product 'X' is :
A.
B.
C.
D.
2021
Q167
JEE Mains
MCQ
14 Mar 2026
Which one of the following compounds will liberate CO2, when treated with NaHCO3 ?
A.
${(C{H_3})_3}\mathop {NH}\limits^ \oplus \mathop {Cl}\limits^\Theta $
B.
${(C{H_3})_4}\mathop N\limits^ \oplus \mathop O\limits^\Theta H$
C.
D.
$C{H_3}N{H_2}$
2021
Q168
JEE Mains
MCQ
14 Mar 2026
The major product (P) in the following reaction is :
A.
B.
C.
D.
2021
Q169
JEE Mains
MCQ
14 Mar 2026
The correct order of their reactivity towards hydrolysis at room temperature is :
A.
(A) > (B) > (C) > (D)
B.
(D) > (A) > (B) > (C)
C.
(D) > (B) > (A) > (C)
D.
(A) > (C) > (B) > (D)
2021
Q170
JEE Mains
MCQ
14 Mar 2026
Which among the above compound/s does/do not form Silver mirror when treated with Tollen's reagent?
A.
(I), (III) and (IV) only
B.
Only (IV)
C.
Only (II)
D.
(III) and (IV) only
2021
Q171
JEE Mains
MCQ
14 Mar 2026
Consider the above reaction, the product 'X' and 'Y' respectively are :
A.
B.
C.
D.
2021
Q172
JEE Mains
MCQ
14 Mar 2026
Consider the above chemical reaction and identify product "A"
A.
B.
C.
D.
2021
Q173
JEE Mains
MCQ
14 Mar 2026
Considering the above chemical reaction, identify the product "X" :
A.
B.
C.
D.
2021
Q174
JEE Mains
MCQ
14 Mar 2026
The product ''A'' in the above reaction is :
A.
B.
C.
D.
2021
Q175
JEE Mains
MCQ
14 Mar 2026
Mesityl oxide is a common name of :
A.
3-Methyl cyclohexane carbaldehyde
B.
4-Methyl pent-3-en-2-one
C.
2,4-Dimethyl pentan-3-one
D.
2-Methyl cyclohexanone
2021
Q176
JEE Mains
MCQ
14 Mar 2026
In the above reaction, the reagent ''A'' is :
A.
LiAlH4
B.
NaBH4, H3O+
C.
HCl, Zn $-$ Hg
D.
Alkaline KMnO4, H+
2021
Q177
JEE Mains
MCQ
14 Mar 2026
The product ''P'' in the above reaction is :
A.
B.
C.
D.
2021
Q178
JEE Mains
MCQ
14 Mar 2026
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 :
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 :
A.
Both A and R are true but R is not the correct explanation of A
B.
A is true but R is false
C.
A is false but R is true
D.
Both A and R are true and R is the correct explanation of A
2021
Q179
JEE Mains
MCQ
14 Mar 2026
Identify A in the following chemical reaction.
A.
B.
C.
D.
2021
Q180
JEE Mains
MCQ
14 Mar 2026
2, 4-DNP test can be used to identify :
A.
ether
B.
amine
C.
aldehyde
D.
halogens
2021
Q181
JEE Mains
MCQ
14 Mar 2026
Considering the above reaction, the major product among the following is :
A.
B.
C.
D.
2021
Q182
JEE Mains
MCQ
14 Mar 2026
Identify A in the given chemical reaction.
A.
B.
C.
D.
2021
Q183
JEE Mains
MCQ
14 Mar 2026
The major product of the following reaction is :
A.
B.
C.
D.
2021
Q184
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
Q185
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
Q186
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
Q187
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
Q188
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
Q189
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
Q190
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
Q191
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
Q192
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
Q193
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
Q194
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
2020
Q195
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
Q196
JEE Mains
MCQ
14 Mar 2026
The major products of the following reaction are :
A.
B.
C.
D.
2020
Q197
JEE Mains
MCQ
14 Mar 2026
Consider the following reactions
'A' is :
'A' is :
A.
B.
C.
D.
2020
Q198
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
Q199
JEE Mains
MCQ
14 Mar 2026
In the following reaction sequence the major
products A and B are :
A.
B.
C.
D.
2020
Q200
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.
