JEE Main
Chemistry
Aldehydes, Ketones and Carboxylic Acids
Previous Years Questions

In a reaction, reagents 'X' and 'Y' respectively are :...
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : $$\alpha$$-halocarboxylic a...
The structures of major products A, B and C in the following reaction are sequence. ...
Identify the incorrect option from the following
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Ketoses give Seliwanoff's t...
What is the correct order of acidity of the protons marked $$\mathrm{A}-\mathrm{D}$$ in the given compounds ? ...
Which of the following compounds would give the following set of qualitative analysis ? (i) Fehling's Test : Positive (ii) Na fusion extract upon trea...
Find out the major products from the following reaction sequence. ...
Match List I with List II .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-family...
'A' in the given reaction is ...
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R Assertion A : Butylated hydroxy anisole when adde...
Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R : Assertion A : Acetal / Ketal is stable in basi...
Given below are two statements : In the light of the above statements, choose the correct answer from the options given below:...
'R' formed in the following sequence of reactions is : ...
Compound (X) undergoes following sequence of reactions to give the Lactone (Y). ...
Correct structure of $$\gamma$$-methylcyclohexane carbaldehyde is
Consider the above reaction sequence, the Product 'C' is :...
Consider the above reaction, the compound 'A' is :...
Find out the major product for the above reaction....
The structure of A in the given reaction is : ...
Match List - I with List - II. .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-f...
Hydrolysis of which compound will give carbolic acid?
Consider the above reaction and predict the major product....
The products formed in the following reaction, A and B are ...
Which one of the following reactions does not represent correct combination of substrate and product under the given conditions?
An organic compound 'A' on reaction with NH3 followed by heating gives compound B. Which on further strong heating gives compound C (C8H5NO2). Compoun...
Given below are two statements : Statement I : On heating with $$\mathrm{KHSO}_{4}$$, glycerol is dehydrated and acrolein is formed. Statement II : Ac...
Consider the given chemical reaction Identify the product P....
Choose the reaction which is not possible:
Which among the following will be the major product of the given reaction? ...
In the given conversion the compound A is :...
Given below are two statements : Statement I : The esterification of carboxylic acid with an alcohol is a nucleophilic acyl substitution. Statement II...
In the above reaction 'A' is...
Isobutyraldehyde on reaction with formaldehyde and K2CO3 gives compound 'A'. Compound 'A' reacts with KCN and yields compound 'B', which on hydrolysis...
The correct structure of product 'A' formed in the following reaction. is...
Match List-I with List-II. .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-famil...
Decarboxylation of all six possible forms of diaminobenzoic acids C6H3(NH2)2COOH yields three products A, B and C. Three acids give a product 'A', two...
Which of the following reactions will yield benzaldehyde as a product? ...
L-isomer of a compound 'A' (C4H8O4) gives a positive test with [Ag(NH3)2]+. Treatment of 'A' with acetic anhydride yields triacetate derivative. Compo...
Oxidation of toluene to benzaldehyde can be easily carried out with which of the following reagents?
The reagent, from the following, which converts benzoic acid to benzaldehyde in one step is ...
The final product 'A' in the following reaction sequence ...
(C7H5O2)2 $$\buildrel {hv} \over \longrightarrow$$ [X] $$\to$$ 2C6H5 + 2CO2 Consider the above reaction and identify the intermediate 'X'...
Consider the above reaction sequence and identify the product B....
Which will have the highest enol content?
Among the following structures, which will show the most stable enamine formation? (Where Me is $$-$$CH3)
Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : A mixture contains benzoic acid a...
Which of the following conditions or reaction sequence will NOT give acetophenone as the major product?
Which of the following ketone will NOT give enamine on treatment with secondary amines? [where t-Bu is $$-$$C(CH3)3]
In the following reaction : The compounds A and B respectively are :...
In the following sequence of reactions a compound A, (molecular formula C6H12O2) with a straight chain structure gives a C4 carboxylic acid. A is : ...
Given below are two statements :Statement I : The nucleophilic addition of sodium hydrogen sulphite to an aldehyde or a ketone involves proton transfe...
For the reaction given below :-The compound which is not formed as a product in the reaction is a :...
The correct order of reactivity of the given chlorides with acetate in acetic acid is :
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R) :Assertion (A) : A simple distillation can b...
The structure of product C, formed by the following sequence of reactions is :...
Which one of the following reactions will not yield propionic acid?
Which one of the following tests used for the identification of functional groups in organic compounds does not use copper reagent?
The structure of the starting compound P used in the reaction given below is :...
The major products formed in the following reaction sequence A and B are :...
The major product formed in the following reaction is :...
$$R - CN\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{(ii){H_2}O}^{(i)DIBAL - H}} R - Y$$Consider the above reaction and identify "Y"
Which one of the following compounds will give orange precipitate when treated with 2, 4-dinitrophenyl hydrazine?
Maleic anhydride can prepared by :...
[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 re...
Consider the given reaction, the product 'X' is :...
Given below are two statements, one is labelled as Assertion (A) and other is labelled as Reason (R). Assertion (A) : Gabriel phthalimide synthesis ca...
The major product (P) in the following reaction is :...
Which among the above compound's does\do not form Silver mirror when treated with Tollen's reagent?...
Consider the above reaction, the product 'X' and 'Y' respectively are :...
Consider the above chemical reaction and identify product "A"...
Considering the above chemical reaction, identify the product "X" :...
In the above reaction, the structural formula of (A), ''X'' and ''Y'' respectively are :...
The product ''A'' in the above reaction is :...
Mesityl oxide is a common name of :
The structure of X is :...
In the above reaction, the reagent ''A'' is :...
The product ''P'' in the above reaction is :...
Assertion A : Enol form of acetone [CH3COCH3] exists in < 0.1% quantity. However, the enol form of acetyl acetone [CH3COCH2OCCH3] exists in approxi...
Identify A in the following chemical reaction....
2, 4-DNP test can be used to identify :
Identify A in the given chemical reaction....
The major product of the following reaction is : ...
Which one of the following reactions will not form acetaldehyde?
Given below are two statements :Statement I : CeO2 can be used for oxidation of aldehydes and ketones.Statement II : Aqueous solution of EuSO4 is a st...
The major product of the following chemical reaction is :...
Which one of the following carbonyl compounds cannot be prepared by addition of water on an alkyne in the presence of HgSO4 and H2SO4?...
Match List - I and List - II. .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-fam...
Which of the following reagent is used for the following reaction ? $$\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}_3 \stackrel{?}{\longrightarrow} \mathrm... The correct match between Item-I (starting material) and Item-II (reagent) for the preparation of benzaldehyde is : .tg {border-collapse:collapse;bo... The major products of the following reaction are : ... Consider the following reactions 'A' is :... In the following reaction sequence the major products A and B are : ... The increasing order of the acidity of the$$\alpha $$-hydrogen of the following compounds is : ... The major product [C] of the following reaction sequence will be : ... 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 t... [P] on treatment with Br2/FeBr3 in CCl4 produced a single isomer C8H7O2Br while heating [P] with sodalime gave toluene. The compound [P] is... The increasing order of the reactivity of the following compound in nucleophilic addition reaction is : Propanal, Benzaldehyde, Propanone, Butanone... The compound A in the following reaction is : ... Arrange the following labelled hydrogens in decreasing order of acidity : ... Two compounds A and B with same molecular formula (C3H6O) undergo Grignard’s reaction with methylmagnesium bromide to give products C and D. Products ... An organic compound ‘A’ (C9H10O) when treated with conc. HI undergoes cleavage to yield compounds ‘B’ and ‘C’. ‘B’ gives yellow precipitate with AgNO3... The correct observation in the following reactions is : ... The major aromatic product C in the following reaction sequence will be : ... The increasing order of the following compounds towards HCN addition is : ... The most suitable reagent for the given conversion is : ... The predominant intermolecular forces present in ethyl acetate, a liquid, are: The major products of the following reaction are : ... The major product(s) obtained in the following reaction is/are : ... 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 phe... The major product 'Y' in the following reaction is : ... Major products of the following reaction are : ... In the following reaction Rate of the reaction is the highest for :... p-Hydroxybenzophenone upon reaction with bromine in carbon tetrachloride gives: The major product of the following reaction is : ... The major product of the following reaction is : ... The major product obtained in the following reaction is ... The major product of the following reaction is : ... The major product of the following reaction is : ... The major product of the following reaction is – ... The aldehydes which will not form Grignard product with one equivalent Grignard reagents are - ... The major product of the following reaction is – ... In the following reaction : Aldehyde + Alcohol$$\buildrel {HCl} \over \longrightarrow $$Acetal .tg {border-collapse:col... In the following reaction, products A and B are – ... can not be prepared by - ... The major product obtained in the following reaction is : ... The major product obtained in the following conversion is ... The major product of the following reaction is : ... The major product of the following reaction is ... The major product of the following reaction is ... The major product of the following reaction is : ... What will be the major product in the following mononitration reaction ? ... The major product obtained in the following reaction is : ... Which dicarboxylic acid in presence of a dehydrating agent is least reactive to give an anhydride? The correct match between Item I and Item II is : .tg {border-collapse:collapse;border-spacing:0;} .tg td{font-family:Arial, sans-serif;font-size:14... The major product in the following reaction is : ... The major product of the following reaction is : ... The major product of the following reaction is : ... The products formed in the reaction of cumene with O2 followed by treatment with dil. HCl are : The tests performed on compound X and their inferences are : .tg {border-collapse:collapse;border-spacing:0;} .tg td{font-family:Arial, sans-serif;... The major product of the following reaction is : ... Which of the following compounds will most readily be dehydrated to give alkene under acidic condition ? The major product of the following reaction is : ... The major product B formed in the following reaction sequence is : ... The increasing order of the acidity of the following carboxylic acids is : ... The total number of optically active compounds formed in the following reactio is : ... The major product formed in the following reaction is : ... The increasing order of nitration of the following compounds is : ... The main reduction product of the following compound with NaBH4 in methanol is : ... The reagent(s) required for the following conversion are : ... A compound of molecular formula C8H8O2 reacts with acetophenone to form a single cross-aldol product in the presence of base. The same compound on re... Which of the following compounds will show highest dipole moment ? ... The major product expected from the following reaction is : ... Sodium salt of an organic acid ‘X’ produces effervescence with conc. H2SO4. ‘X’ reacts with the acidified aqueous CaCl2 solution to give a white preci... The major product obtained in the following reaction is : ... The correct sequence of reagents for the following conversion will be : ... The correct statement about the synthesis of erythritol (C(CH2OH)4) used in the preparation of PETN is : In the following sequence of reactions: The product C is... In the reaction, the product C is:... The most suitable reagent for the conversion of R - CH2 - OH$$\to$$R - CHO is: Iodoform can be prepared from all except : In the given transformation, which of the following is the most appropriate reagent ? ... Trichloroacetaldehyde was subjected to Cannizzaro’s reaction by using NaOH. The mixture of the products contains sodium trichloroacetate and another c... The strongest acid amongst the following compounds is : Sodium ethoxide has reacted with ethanoyl chloride. The compound that is produced in the above reaction is A liquid was mixed with ethanol and a drop of concentrated H2SO4 was added. A compound with a fruity smell was formed. The liquid was : ... In Cannizzaro reaction given below 2PhCHO$$\buildrel {\mathop {:OH}\limits^{\left( - \right)} } \over \longrightarrow $$PhCH2OH +$$PhC\mathop O...
Which of the following on heating with aqueous KOH, produces acetaldehyde ?
The increasing order of the rate of HCN addition to compounds A – D is (A) HCHO (B) CH3COCH3 (C) PhCOCH3 (D) PhCOPh...
The correct order of increasing acid strength of the compounds ...
Among the following acids which has the lowest pKa value?
Reaction of cyclohexanone with dimethylamine in the presence of catalytic amount of an acid forms a compound if water during the reaction is continuou...
On mixing ethyl acetate with aqueous sodium chloride, the composition of the resultant solution is
Which of the following undergoes reaction with 50% sodium hydroxide solution to give the corresponding alcohol and acid?
Which one of the following reduced with zinc and hydrochloric acid to give the corresponding hydrocarbon?
Acetyl bromide reacts with excess of CH3MgI followed by treatment with a saturated solution of NH4Cl given
When CH2 = CH - COOH is reduced with LiAlH4, the compound obtained will be
What is B?...
Picric acid is :

## Numerical

Number of isomeric compounds with molecular formula $$\mathrm{C}_{9} \mathrm{H}_{10} \mathrm{O}$$ which (i) do not dissolve in $$\mathrm{NaOH}$$ (ii) ...
The number of molecules which gives the haloform test among the following molecules is ________. ...
Number of compounds from the following which will not dissolve in cold $\mathrm{NaHCO}_{3}$ and $\mathrm{NaOH}$ solutions but will dissolve in hot $\m... A trisubstituted compound '$$\mathrm{A}$$', $$\mathrm{C}_{10} \mathrm{H}_{12} \mathrm{O}_{2}$$ gives neutral $$\mathrm{FeCl}_{3}$$ test positive. Trea... The number of stereoisomers formed in a reaction of $$(±)\mathrm{Ph}(\mathrm{C}=\mathrm{O}) \mathrm{C}(\mathrm{OH})(\mathrm{CN}) \mathrm{Ph}$$ with$\$...
The spin only magnetic moment of the complex present in Fehling's reagent is __________ B.M. (Nearest integer).
In the given reaction The number of chiral carbon/s in product A is ___________....
A hydrocarbon 'X' is found to have molar mass of 80. A 10.0 mg of compound 'X' on hydrogenation consumed 8.40 mL of H2 gas (measured at STP). Ozonolys...
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 si...
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 _________...
The total number of C-C sigma bond/s in mesityl oxide (C6H10O) is __________. (Round off to the Nearest Integer).
The number of chiral centres present in threonine is ________.

## MCQ (More than One Correct Answer)

An organic compound [A], molecular formula C10H20O2 was hydrolyzed with dilute sulphuric acid to give a carboxylic acid [B] and an alcohol [C]. Oxida...
Silver Mirror test is given by which one of the following compounds ?
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