Aldehydes, Ketones and Carboxylic Acids
271 Questions
2021
JEE Mains
MCQ
JEE Main 2021 (Online) 27th July Morning Shift
Which one of the following compounds will give orange precipitate when treated with 2, 4-dinitrophenyl hydrazine?
A.
B.
C.
D.
2021
JEE Mains
MCQ
JEE Main 2021 (Online) 25th July Evening Shift
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
JEE Mains
MCQ
JEE Main 2021 (Online) 25th July Evening Shift
[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
JEE Mains
MCQ
JEE Main 2021 (Online) 25th July Morning Shift
Consider the given reaction, the product 'X' is :
A.
B.
C.
D.
2021
JEE Mains
MCQ
JEE Main 2021 (Online) 25th July Morning Shift
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
JEE Mains
MCQ
JEE Main 2021 (Online) 20th July Evening Shift
The major product (P) in the following reaction is :
A.
B.
C.
D.
2021
JEE Mains
MCQ
JEE Main 2021 (Online) 20th July Evening Shift
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
JEE Mains
MCQ
JEE Main 2021 (Online) 20th July Morning Shift
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
JEE Mains
MCQ
JEE Main 2021 (Online) 18th March Evening Shift
Consider the above reaction, the product 'X' and 'Y' respectively are :
A.
B.
C.
D.
2021
JEE Mains
MCQ
JEE Main 2021 (Online) 18th March Morning Shift
Consider the above chemical reaction and identify product "A"
A.
B.
C.
D.
2021
JEE Mains
MCQ
JEE Main 2021 (Online) 18th March Morning Shift
Considering the above chemical reaction, identify the product "X" :
A.
B.
C.
D.
2021
JEE Mains
MCQ
JEE Main 2021 (Online) 17th March Morning Shift
The product ''A'' in the above reaction is :
A.
B.
C.
D.
2021
JEE Mains
MCQ
JEE Main 2021 (Online) 17th March Morning Shift
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
JEE Mains
MCQ
JEE Main 2021 (Online) 16th March Evening Shift
In the above reaction, the reagent ''A'' is :
A.
LiAlH4
B.
NaBH4, H3O+
C.
HCl, Zn $-$ Hg
D.
Alkaline KMnO4, H+
2021
JEE Mains
MCQ
JEE Main 2021 (Online) 16th March Morning Shift
The product ''P'' in the above reaction is :
A.
B.
C.
D.
2021
JEE Mains
MCQ
JEE Main 2021 (Online) 16th March Morning Shift
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
JEE Mains
MCQ
JEE Main 2021 (Online) 26th February Evening Shift
Identify A in the following chemical reaction.
A.
B.
C.
D.
2021
JEE Mains
MCQ
JEE Main 2021 (Online) 26th February Evening Shift
2, 4-DNP test can be used to identify :
A.
ether
B.
amine
C.
aldehyde
D.
halogens
2021
JEE Mains
MCQ
JEE Main 2021 (Online) 26th February Evening Shift
Considering the above reaction, the major product among the following is :
A.
B.
C.
D.
2021
JEE Mains
MCQ
JEE Main 2021 (Online) 26th February Evening Shift
Identify A in the given chemical reaction.
A.
B.
C.
D.
2021
JEE Mains
MCQ
JEE Main 2021 (Online) 25th February Evening Shift
The major product of the following reaction is :
A.
B.
C.
D.
2021
JEE Mains
MCQ
JEE Main 2021 (Online) 25th February Morning Shift
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
JEE Mains
MCQ
JEE Main 2021 (Online) 25th February Morning Shift
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
JEE Mains
MCQ
JEE Main 2021 (Online) 25th February Morning Shift
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
JEE Mains
MCQ
JEE Main 2021 (Online) 24th February Evening Shift
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
JEE Mains
MCQ
JEE Main 2021 (Online) 24th February Evening Shift
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
JEE Mains
MCQ
JEE Main 2021 (Online) 24th February Evening Shift
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
JEE Mains
MCQ
JEE Main 2021 (Online) 24th February Morning Shift
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
JEE Mains
Numerical
JEE Main 2021 (Online) 18th March Evening Shift
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
JEE Mains
Numerical
JEE Main 2021 (Online) 18th March Evening Shift
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
JEE Mains
Numerical
JEE Main 2021 (Online) 17th March Evening Shift
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
JEE Mains
Numerical
JEE Main 2021 (Online) 25th February Evening Shift
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
JEE Mains
MCQ
JEE Main 2020 (Online) 6th September Evening Slot
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
JEE Mains
MCQ
JEE Main 2020 (Online) 6th September Morning Slot
The major products of the following reaction are :
A.
B.
C.
D.
2020
JEE Mains
MCQ
JEE Main 2020 (Online) 6th September Morning Slot
Consider the following reactions
'A' is :
'A' is :
A.
B.
C.
D.
2020
JEE Mains
MCQ
JEE Main 2020 (Online) 5th September Morning Slot
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
JEE Mains
MCQ
JEE Main 2020 (Online) 5th September Morning Slot
In the following reaction sequence the major
products A and B are :
A.
B.
C.
D.
2020
JEE Mains
MCQ
JEE Main 2020 (Online) 5th September Morning Slot
Which of the following derivatives of alcohols
is unstable in an aqueous base?
A.
RO—CMe3
B.
C.
D.
2020
JEE Mains
MCQ
JEE Main 2020 (Online) 4th September Evening Slot
The major product [C] of the following reaction
sequence will be :
A.
B.
C.
D.
2020
JEE Mains
MCQ
JEE Main 2020 (Online) 4th September Morning Slot
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
JEE Mains
MCQ
JEE Main 2020 (Online) 4th September Morning Slot
[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
JEE Mains
MCQ
JEE Main 2020 (Online) 3rd September Evening Slot
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
JEE Mains
MCQ
JEE Main 2020 (Online) 3rd September Evening Slot
The compound A in the following reaction is :
A.
B.
C.
D.
2020
JEE Mains
MCQ
JEE Main 2020 (Online) 3rd September Evening Slot
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
JEE Mains
MCQ
JEE Main 2020 (Online) 2nd September Evening Slot
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
JEE Mains
MCQ
JEE Main 2020 (Online) 2nd September Evening Slot
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
JEE Mains
MCQ
JEE Main 2020 (Online) 2nd September Morning Slot
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
JEE Mains
MCQ
JEE Main 2020 (Online) 9th January Evening Slot
In the following reaction A is :
A.
B.
C.
D.
2020
JEE Mains
MCQ
JEE Main 2020 (Online) 9th January Morning Slot
Identify (A) in the following reaction sequence :
A.
B.
C.
D.
2020
JEE Mains
MCQ
JEE Main 2020 (Online) 8th January Evening Slot
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.
