Aldehydes, Ketones and Carboxylic Acids · Chemistry · NEET

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MCQ (Single Correct Answer)

1

Select the incorrect reaction among the following :

NEET 2024 (Re-Examination)
2

Identify the correct reagents that would bring about the following transformation.

NEET 2024 Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 2 English

NEET 2024
3

Match List I with List II.

List I
(Reaction)
List II
(Reagents/Condition)
A. NEET 2024 Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 4 English 1 I. NEET 2024 Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 4 English 2
B. NEET 2024 Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 4 English 3 II. CrO$$_3$$
C. NEET 2024 Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 4 English 4 III. KMnO$$_4$$/KOH, $$\Delta$$
D. NEET 2024 Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 4 English 5 IV. (i) O$$_3$$
(ii) Zn-H$$_2$$O

Choose the correct answer from the options given below:

NEET 2024
4

For the given reaction:

NEET 2024 Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 3 English

'P' is

NEET 2024
5

Consider the given reaction:

$$\mathrm{CH}_3 \mathrm{COCH}_3 \stackrel{\text { dil } \mathrm{Ba}(\mathrm{OH})_2}{\longrightarrow} \text { ''X" }$$

The functional groups present in compound "$$\mathrm{X}$$" are:

NEET 2023 Manipur
6

NEET 2023 Manipur Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 5 English

Identify 'X' in above reactions

NEET 2023 Manipur
7

The following conversion is known as:

NEET 2023 Manipur Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 7 English

NEET 2023 Manipur
8

Reagents which can be used to convert alcohols to carboxylic acids, are

(A) $$\mathrm{CrO}_3-\mathrm{H}_2 \mathrm{SO}_4$$

(B) $$\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7+\mathrm{H}_2 \mathrm{SO}_4$$

(C) $$\mathrm{KMnO}_4+\mathrm{KOH} / \mathrm{H}_3 \mathrm{O}^{+}$$

(D) $$\mathrm{Cu}, 573 \mathrm{~K}$$

(E) $$\mathrm{CrO}_3,\left(\mathrm{CH}_3 \mathrm{CO}\right)_2 \mathrm{O}$$

Choose the most appropriate answer from the options given below :

NEET 2023 Manipur
9

The major product formed in the following conversion is ___________.

NEET 2023 Manipur Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 8 English

NEET 2023 Manipur
10

Complete the following reaction:

NEET 2023 Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 10 English

[C] is _______.

NEET 2023
11

Identify the major product obtained in the following reaction:

NEET 2023 Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 12 English

NEET 2023
12

Identify the final product [D] obtained in the following sequence of reactions.

NEET 2023 Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 11 English

NEET 2023
13

Which of the following reactions is not an example for nucleophilic addition-elimination reaction?

NEET 2022 Phase 2
14

The product formed from the following reaction sequence is

NEET 2022 Phase 2 Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 15 English

NEET 2022 Phase 2
15

Match List-I with List-II :

List-I
(Reaction)
List-II
(Product formed)
(a) Gabriel synthesis (i) Benzaldehyde
(b) Kolbe synthesis (ii) Ethers
(c) Williamson synthesis (iii) Primary amines
(d) Etard reaction (iv) Salicylic acid

Choose the correct answer from the options given below :

NEET 2022 Phase 2
16

The incorrect method to synthesize benzaldehyde is

NEET 2022 Phase 2
17

Given below are two statements :

Statement I : The boiling points of aldehydes and ketones are higher than hydrocarbons of comparable molecular masses because of weak molecular association in aldehydes and ketones due to dipole - dipole interactions.

Statement II : The boiling points of aldehydes and ketones are lower than the alcohols of similar molecular masses due to the absence of H-bonding.

In the light of the above statements, choose the most appropriate answer from the given below

NEET 2022 Phase 1
18

RMgX + CO2 $$\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{ether}^{dry}} $$ Y $$\buildrel {{H_3}{O^ + }} \over \longrightarrow $$ RCOOH

What is Y in the above reaction?

NEET 2022 Phase 1
19

Match List-I with List-II.

List - I
(Products formed)
List - II
(Reaction of carbonyl compound with)
(a) Cyanohydrin (i) NH$$_2$$OH
(b) Acetal (ii) RNH$$_2$$
(c) Schiff's base (iii) Alcohol
(d) Oxime (iv) HCN

Choose the correct answer from the options given below

NEET 2022 Phase 1
20

Compound X on reaction with O3 followed by Zn/H2O gives formaldehyde and 2-methyl propanal as products. The compound X is

NEET 2022 Phase 1
21

Which one of the following is not formed when acetone reacts with 2-pentanone in the presence of dilute NaOH followed by heating?

NEET 2022 Phase 1
22
What is the IUPAC name of the organic compound formed in the following chemical reaction?

NEET 2021 Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 24 English
NEET 2021
23
NEET 2021 Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 23 English
Consider the above reaction and identify the missing reagent/chemical.
NEET 2021
24
Match List-I with List-II

NEET 2021 Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 26 English
Choose the correct answer from the options given below.
NEET 2021
25
The intermediate compound 'X' in the following chemical reaction is :

NEET 2021 Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 22 English
NEET 2021
26
The product formed in the following chemical reaction is :

NEET 2021 Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 25 English
NEET 2021
27
Identify compound X in the following sequence of reactions :

NEET 2020 Phase 1 Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 29 English
NEET 2020 Phase 1
28
Reaction between benzaldehyde and acetophenone in presence of dilute NaOH is known as :
NEET 2020 Phase 1
29
Reaction between acetone and methylmagnesium chloride followed by hydrolysis will give :
NEET 2020 Phase 1
30
Carboxylic acids have higher boiling points than aldehydes, ketones and even alcohols of comparable molecular mass. It is due to their
NEET 2018
31
Of the following, which is the product formed when cyclohexanone undergoes aldol condensation followed by heating?
NEET 2017
32
Consider the reactions,
NEET 2017 Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 68 English
Identify A, X, Y and Z.
NEET 2017
33
The correct structure of the product 'A' formed in the reaction
NEET 2016 Phase 2 Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 66 English
NEET 2016 Phase 2
34
The correct order of strengths of the carboxylic acids
NEET 2016 Phase 2 Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 67 English
is
NEET 2016 Phase 2
35
Which of the following reagents would distinguish cis-cyclopenta-1-2-diol from the trans-isomer?
NEET 2016 Phase 1
36
The correct statement regarding a carbonyl compound with a hydrogen atom on its alpha-carbon, is
NEET 2016 Phase 1
37
Which one of the following esters gets hydrolysed most easily under alkaline conditions?
AIPMT 2015
38
The oxidation of benzene by V2O5 in the presence of air produces
AIPMT 2015
39
Reaction of a carbonyl compound with one of the following reagents involves nucleophilic addition followed by elimination of water. The reagent is
AIPMT 2015
40
Treatment of cyclopentanone

AIPMT 2015 Cancelled Paper Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 92 English
with methyl lithium gives which of the following species ?
AIPMT 2015 Cancelled Paper
41
An organic compound 'X' having molecular formula C5H10O yields phenylhydrazone and gives negative response to the iodoform test and Tollens' test. It produces n-pentane on reduction. 'X' could be
AIPMT 2015 Cancelled Paper
42
Which one is most reactive towards nucleophilic addition reaction?
AIPMT 2014
43
Reaction by which benzaldehyde cannot be prepared
NEET 2013
44
The order of stability of the following tautomeric compounds is

NEET 2013 Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 61 English
NEET 2013
45
Consider the reaction :
RCHO + NH2NH2 $$ \to $$ RCH $$=$$ N $$-$$ NH2

What sort of reaction is it?
AIPMT 2012 Mains
46
Consider the following reaction

AIPMT 2012 Mains Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 59 English
The product A is
AIPMT 2012 Mains
47
The correct order of decreasing acid strength of trichloroacetic acid (A), trifluoroacetic acid (B), acetic acid (C) and formic acid (D) is
AIPMT 2012 Prelims
48
CH3CHO and C6H5CH2CHO can be distinguished chemically by
AIPMT 2012 Prelims
49
Acetone is treated with excess of ethanol in the presence of hydrochloric acid. The product obtained is
AIPMT 2012 Prelims
50
Predict the products in the given reaction.

AIPMT 2012 Prelims Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 62 English
AIPMT 2012 Prelims
51
The order of reactivity of phenyl magnesium bromide (PhMgBr) with the following compounds:
AIPMT 2011 Mains Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 57 English
AIPMT 2011 Mains
52
An organic compound A on treatment with NH3 gives B, which on heating gives C. C when treated with Br2 in the presence of KOH produces ethyl amine. Compound A is
AIPMT 2011 Mains
53
Match the compounds given in List-I with List-II and select the suitable option using the code given below.

List-I
List-II
(A) Benzaldehyde (i) Phenolphthalein
(B) Phthalic anhydride (ii) Benzoin condensation
(C) Phenyl benzoate (iii) Oil of wintergreen
(D) Methyl salicylate (iv) Fries rearrangement
AIPMT 2011 Mains
54
Which one is a nucleophilic substitution reaction among the following ?
AIPMT 2011 Prelims
55
Clemmensen reduction of a ketone is carried out in the presence of which of the following?
AIPMT 2011 Prelims
56
In a set of reactions m-bromobenzoic acid gave a product D. Identify the product D.
AIPMT 2011 Prelims Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 58 English
AIPMT 2011 Prelims
57
Which one of the following compounds will be most readily dehydrated?
AIPMT 2010 Mains
58
Among the given compounds, the most susceptible to nucleophilic attack at the carbonyl group is
AIPMT 2010 Prelims
59
Which of the following reactions will not result in the formation of carbon-carbon bonds?
AIPMT 2010 Prelims
60
Propionic acid with Br2/P yields a dibromo product. Its structure would be
AIPMT 2009
61
Trichloroacetaldehyde, CCl3CHO reacts with chlorobenzene in presence of sulphuric acid and produces
AIPMT 2009
62
Acetophenone when reacted with a base, C2H5ONa,   yields a stable compound which has the structure
AIPMT 2008
63
The relative reactivities of acyl compounds towards nucleophilic substitution are in the order of
AIPMT 2008
64
A strong base can abstract an $$\alpha $$-hydrogen from
AIPMT 2008
65
The product formed in Aldol condensation is
AIPMT 2007
66
Consider the following compounds
AIPMT 2007 Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 50 English
The correct decreasing order of their reactivity towards hydrolysis is
AIPMT 2007
67
Which of the following represents the correct order of the acidity in the given compounds ?
AIPMT 2007
68
Which one of the following on treatment with 50% aqueous sodium hydroxide yields the corresponding alcohol and acid?
AIPMT 2007
69
Reduction of aldehydes and ketones into hydrocarbons using zinc amalgam and conc. HCl is called
AIPMT 2007
70
Nucleophilic addition reaction will be most favoured in
AIPMT 2006
71
A carbonyl compound reacts with hydrogen cyanide to form cyanohydrin which on hydrolysis forms a racemic mixture of $$\alpha $$-hydrixy acid. The carbonyl compound is
AIPMT 2006
72
Self condensation of two moles of ethyl acetate in presence of sodium ethoxide yields
AIPMT 2006
73
In a set of reactions propionic acid yielded a compound D.
AIPMT 2006 Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 47 English
The structure of D would be
AIPMT 2006
74
In a set of reactions acetic acid yielded a product D.
AIPMT 2005 Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 44 English
The structure of D would be
AIPMT 2005
75
The major organic product formed from the following reaction :

AIPMT 2005 Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 45 English
is
AIPMT 2005
76
The $$-$$ OH group of an alcohol or the $$-$$ COOH group of a carboxylic acid can be replaced by $$-$$ Cl using
AIPMT 2004
77
Which one of the following can be oxidised to the corresponding carbonyl compound?
AIPMT 2004
78
$$A$$ and $$B$$ in the following reactions are :
AIPMT 2003 Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 40 English
AIPMT 2003
79
In this reaction :
CH3CHO + HCN $$ \to $$ CH3CH(OH)CN
           $$\buildrel {HOH} \over \longrightarrow $$ CH3CH(OH)COOH
an asymmetric centre is generated. The acid obtained would be
AIPMT 2003
80
When $$m$$-chlorobenzaldehyde is treated with 50% KOH solution, the product(s) obtained is (are)
AIPMT 2003
81
In a set of the given reactions, acetic acid yielded a product C.
AIPMT 2003 Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 39 English
Product $$C$$ would be
AIPMT 2003
82
AIPMT 2002 Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 88 English
In the above reaction product P is
AIPMT 2002
83
AIPMT 2002 Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 38 English
are
AIPMT 2002
84
In the following reaction product $$P$$ is
AIPMT 2002 Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 37 English
AIPMT 2002
85
Which of the following is incorrect?
AIPMT 2001
86
Which alkene on ozonolysis gives CH3CH2CHO and CH3COCH3?
AIPMT 2001
87
Which of the following give positive Fehling solution test?
AIPMT 2001
88
Polarisation in acrolein can be described as
AIPMT 2000
89
Benzoic acid may be converted into ethyl benzoate by reaction with :
AIPMT 2000
90
Reduction by LiAlH4 of hydrolysed product of an ester gives
AIPMT 2000
91
First product of the reaction between RCHO and NH2NH2 is
AIPMT 2000

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