Aldehydes, Ketones and Carboxylic Acids
104 Questions
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2015
Q51
NEET
MCQ
10 Mar 2026
Reaction of a carbonyl compound with one of the following reagents involves nucleophilic addition followed by elimination of water. The reagent is
A.
hydrazine in presence of feebly acidic solution
B.
hydrocyanic acid
C.
sodium hydrogen sulphate
D.
a Grignard reagent.
2015
Q52
NEET
MCQ
10 Mar 2026
Treatment of cyclopentanone
with methyl lithium gives which of the following species ?
with methyl lithium gives which of the following species ?
A.
Cyclopentanonyl radical
B.
Cyclopentanonyl biradical
C.
Cyclopentanonyl anion
D.
Cyclopentanonyl cation
2015
Q53
NEET
MCQ
10 Mar 2026
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
A.
3-pentanone
B.
n-amyl alcohol
C.
pentanal
D.
2-pentanone
2014
Q54
NEET
MCQ
10 Mar 2026
Which one is most reactive towards nucleophilic addition reaction?
A.
B.
C.
D.
2013
Q55
NEET
MCQ
10 Mar 2026
The order of stability of the following tautomeric compounds is
A.
II > I > III
B.
II > III > I
C.
I > II > III
D.
III > II > I
2013
Q56
NEET
MCQ
10 Mar 2026
Reaction by which benzaldehyde cannot be prepared
A.
B.
C.
D.
2012
Q57
NEET
MCQ
10 Mar 2026
Consider the reaction :
RCHO + NH2NH2 $ \to $ RCH $=$ N $-$ NH2
What sort of reaction is it?
RCHO + NH2NH2 $ \to $ RCH $=$ N $-$ NH2
What sort of reaction is it?
A.
Electrophilic addition-elimination reaction
B.
Free radical addition-elimination reaction
C.
Electrophilic substitution-elimination reaction
D.
Nucleophilic addition-elimination reaction
2012
Q58
NEET
MCQ
10 Mar 2026
Consider the following reaction
The product A is
The product A is
A.
C6H5CHO
B.
C6H5OH
C.
C6H5COCH3
D.
C6H5Cl
2012
Q59
NEET
MCQ
10 Mar 2026
CH3CHO and C6H5CH2CHO can be distinguished chemically by
A.
Benedict's test
B.
Iodoform test
C.
Tollen's reagent test
D.
Fehling's solution test
2012
Q60
NEET
MCQ
10 Mar 2026
Predict the products in the given reaction.
A.
B.
C.
D.
2012
Q61
NEET
MCQ
10 Mar 2026
Acetone is treated with excess of ethanol in the presence of hydrochloric acid. The product obtained is
A.
B.
C.
D.
2012
Q62
NEET
MCQ
10 Mar 2026
The correct order of decreasing acid strength of trichloroacetic acid (A), trifluoroacetic acid (B), acetic acid (C) and formic acid (D) is
A.
B > A > D > C
B.
B > D > C > A
C.
A > B > C > D
D.
A > C > B > D
2012
Q63
NEET
MSQ
10 Mar 2026
Which of the following compounds will give a yellow precipitate with iodine and alkali?
A.
Acetophenone
B.
Methyl acetate
C.
Acetamide
D.
2-Hydroxypropane
2011
Q64
NEET
MCQ
10 Mar 2026
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
A.
CH3COOH
B.
CH3CH2CH2COOH
C.
D.
CH3CH2COOH
2011
Q65
NEET
MCQ
10 Mar 2026
The order of reactivity of phenyl magnesium bromide (PhMgBr) with the following compounds:
A.
III > II > I
B.
II > I > III
C.
I > III > II
D.
I > II > III
2011
Q66
NEET
MCQ
10 Mar 2026
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 |
A.
(A)-(iv), (B)-(i), (C)-(iii), (D)-(ii)
B.
(A)-(iv), (B)-(ii), (C)-(iii), (D)-(i)
C.
(A)-(ii), (B)-(iii), (C)-(iv), (D)-(i)
D.
(A)-(ii), (B)-(i), (C)-(iv), (D)-(iii)
2011
Q67
NEET
MCQ
10 Mar 2026
Clemmensen reduction of a ketone is carried out in the presence of which of the following?
A.
Glycol with KOH
B.
Zn-Hg with HCl
C.
LiAlH4
D.
H2 and Pt as catalyst
2011
Q68
NEET
MCQ
10 Mar 2026
In a set of reactions m-bromobenzoic acid gave a product D. Identify the product D.
A.
B.
C.
D.
2011
Q69
NEET
MCQ
10 Mar 2026
Which one is a nucleophilic substitution reaction among the following ?
A.
B.
C.
D.
2010
Q70
NEET
MCQ
10 Mar 2026
Which one of the following compounds will be most readily dehydrated?
A.
B.
C.
D.
2010
Q71
NEET
MCQ
10 Mar 2026
Which of the following reactions will not result in the formation of carbon-carbon bonds?
A.
Reimer-Tiemann reaction
B.
Cannizzaro reaction
C.
Wurtz reaction
D.
Friedel-Crafts acylation
2010
Q72
NEET
MCQ
10 Mar 2026
Among the given compounds, the most susceptible to nucleophilic attack at the carbonyl group is
A.
CH3COOCH3
B.
CH3CONH2
C.
CH3COOCOCH3
D.
CH3COCl
2009
Q73
NEET
MCQ
10 Mar 2026
Trichloroacetaldehyde, CCl3CHO reacts with chlorobenzene in presence of sulphuric acid and produces
A.
B.
C.
D.
2009
Q74
NEET
MCQ
10 Mar 2026
Propionic acid with Br2/P yields a dibromo product. Its structure would be
A.
B.
CH2(Br) $-$ CH2 $-$ COBr
C.
D.
CH2(Br) $-$ CH(Br) $-$ COOH
2008
Q75
NEET
MCQ
10 Mar 2026
A strong base can abstract an $\alpha $-hydrogen from
A.
ketone
B.
alkane
C.
alkene
D.
amine
2008
Q76
NEET
MCQ
10 Mar 2026
The relative reactivities of acyl compounds towards nucleophilic substitution are in the order of
A.
Acid anhydride > Amide > Ester > Acyl chloride
B.
Acyl chloride > Ester > Acid anhydride > Amide
C.
Acyl chloride > Acid anhydride > Ester > Amide
D.
Ester > Acyl chloride > Amide > Acid anhydride.
2008
Q77
NEET
MCQ
10 Mar 2026
Acetophenone when reacted with a base, C2H5ONa, yields a stable compound which has the structure
A.
B.
C.
D.
2007
Q78
NEET
MCQ
10 Mar 2026
Which of the following represents the correct order of the acidity in the given compounds ?
A.
FCH2COOH > CH3COOH > BrCH2COOH > ClCH2COOH
B.
BrCH2COOH > ClCH2COOH > FCH2COOH > CH3COOH
C.
FCH2COOH > ClCH2COOH > BrCH2COOH > CH3COOH
D.
CH3COOH > BrCH2COOH > ClCH2COOH > FCH2COOH
2007
Q79
NEET
MCQ
10 Mar 2026
Reduction of aldehydes and ketones into hydrocarbons using zinc amalgam and conc. HCl is called
A.
Cope reduction
B.
Dow reduction
C.
Wolf-Kishner reduction
D.
Clemmensen reduction
2007
Q80
NEET
MCQ
10 Mar 2026
Which one of the following on treatment with 50% aqueous sodium hydroxide yields the corresponding alcohol and acid?
A.
C6H5CHO
B.
CH3CH2CH2CHO
C.
D.
C6H5CH2CHO
2007
Q81
NEET
MCQ
10 Mar 2026
Consider the following compounds
The correct decreasing order of their reactivity towards hydrolysis is
The correct decreasing order of their reactivity towards hydrolysis is
A.
(i) > (ii) > (iii) > (iv)
B.
(iv) > (ii) > (i) > (iii)
C.
(ii) > (iv) > (i) > (iii)
D.
(ii) > (iv) > (iii) > (i)
2007
Q82
NEET
MCQ
10 Mar 2026
The product formed in Aldol condensation is
A.
a beta-hydroxy aldehyde or a beta-hydroxy ketone
B.
an alpha-hydroxy aldehyde or ketone
C.
an alpha, beta unsaturated ester
D.
a beta-hydroxy acid.
2006
Q83
NEET
MCQ
10 Mar 2026
Nucleophilic addition reaction will be most favoured in
A.
CH3CHO
B.
C.
(CH3)2C $=$ O
D.
CH3CH2CHO
2006
Q84
NEET
MCQ
10 Mar 2026
Self condensation of two moles of ethyl acetate in presence of sodium ethoxide yields
A.
ethyl propionate
B.
ethyl butyrate
C.
acetoacetic ester
D.
methyl acetoacetate
2006
Q85
NEET
MCQ
10 Mar 2026
In a set of reactions propionic acid yielded a compound D.
The structure of D would be
The structure of D would be
A.
CH3CH2NH2
B.
CH3CH2CH2NH2
C.
CH3CH2CONH2
D.
CH3CH2NHCH3
2006
Q86
NEET
MCQ
10 Mar 2026
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
A.
formaldehyde
B.
acetaldehyde
C.
acetone
D.
diethyl ketone
2005
Q87
NEET
MCQ
10 Mar 2026
In a set of reactions acetic acid yielded a product D.
The structure of D would be
The structure of D would be
A.
B.
C.
D.
2005
Q88
NEET
MCQ
10 Mar 2026
The major organic product formed from the following reaction :
is
is
A.
B.
C.
D.
2004
Q89
NEET
MCQ
10 Mar 2026
The $-$ OH group of an alcohol or the $-$ COOH group of a carboxylic acid can be replaced by $-$ Cl using
A.
phosphorus pentachloride
B.
hypochlorous acid
C.
chlorine
D.
hydrochloric acid
2004
Q90
NEET
MCQ
10 Mar 2026
Which one of the following can be oxidised to the corresponding carbonyl compound?
A.
2-Hydroxypropane
B.
ortho-Nitrophenol
C.
Phenol
D.
2-Methyl-2-hydroxypropane
2003
Q91
NEET
MCQ
10 Mar 2026
In a set of the given reactions, acetic acid yielded a product C.
Product $C$ would be
Product $C$ would be
A.
CH3CH(OH)C2H5
B.
CH3COC6H6
C.
CH3CH(OH)C6H5
D.
2003
Q92
NEET
MCQ
10 Mar 2026
When $m$-chlorobenzaldehyde is treated with 50% KOH solution, the product(s) obtained is (are)
A.
B.
C.
D.
2003
Q93
NEET
MCQ
10 Mar 2026
$A$ and $B$ in the following reactions are :
A.
B.
C.
D.
2003
Q94
NEET
MCQ
10 Mar 2026
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
CH3CHO + HCN $ \to $ CH3CH(OH)CN
$\buildrel {HOH} \over \longrightarrow $ CH3CH(OH)COOH
an asymmetric centre is generated. The acid obtained would be
A.
$D$-isomer
B.
$L$-isomer
C.
50% $D$ + 50% $L$-isomer
D.
20% $D$ + 80% $L$-isomer
2002
Q95
NEET
MCQ
10 Mar 2026
In the above reaction product P is
A.
B.
C.
D.
2002
Q96
NEET
MCQ
10 Mar 2026
In the following reaction product $P$ is
A.
RCH2OH
B.
RCOOH
C.
RCHO
D.
RCH3
2002
Q97
NEET
MCQ
10 Mar 2026
are
A.
resonating structures
B.
tautomers
C.
geometrical isomers
D.
optical isomers.
2001
Q98
NEET
MCQ
10 Mar 2026
Which of the following is incorrect?
A.
FeCl3 is used in detection of phenol.
B.
Fehling solution is used in detection of glucose
C.
Tollen's reagent is used in detection of unsaturation.
D.
NaHSO3 is used in detection of carbonyl compound.
2001
Q99
NEET
MCQ
10 Mar 2026
Which of the following give positive Fehling solution test?
A.
Sucrose
B.
Glucose
C.
Fats
D.
Protein
2001
Q100
NEET
MCQ
10 Mar 2026
Which alkene on ozonolysis gives CH3CH2CHO and CH3COCH3?
A.
B.
CH3CH2CH $=$ CHCH2CH3
C.
CH3CH2CH $=$ CHCH3
D.
