JEE PYQ Aldehydes and Ketones - Chapter-wise Questions with Solutions

About Aldehydes and Ketones PYQs

Aldehydes and Ketones has 526 previous year questions in the Quantrex Academy JEE Main & Advanced Chemistry bank. The 220 questions in this list come from JEE Main (168), JEE Advanced (31) and NTA Abhyas JEE Main (21), spanning 2002 to 2026. Each question opens on its own page with the options, the correct answer and the worked solution where available.

JEE Aldehydes and Ketones PYQs with Solutions

About Aldehydes and Ketones PYQs

Questions by year (this list)

Aldehydes and Ketones questions with solutions

Consider the following reaction. The major product (P) formed is:

' x ' is the product which is obtained from benzene by reacting it with carbon monoxide and hydrogen chloride in the presence of cuprous chloride. ' y ' is the major product

' x ' is the product which is obtained by the hydrolysis of prop-1-yne in the presence of mercuric sulphate under dilute acidic medium at 333 K. ' y ' is the product which is

Given below are two statements: Statement-I: The condensation reaction between CH_3-CH=O and under optimum pH will produce . Statement-II: The molecule will generate Ph-CH=O in

An organic compound " x " where molar ratio of C, O and H are equal, on treatment with 50\% KOH under reflux followed by acidification produced " y ". The most likely structure of

Given below are the four isomeric compounds (P, Q, R, S) Identify correct statements from below. A. Q, R and S will give precipitate with 2,4-DNP . B. P and Q will give positive

Given below are two statements: Statement I : Cross aldol condensation between two different aldehydes will always produce four different products. Statement II : When

Which of the following statements are TRUE about Haloform reaction?: A. Sodium hypochlorite reacts with KI to give KOI. B. KOI is a reducing agent. C. α, β -unsaturated

Iodoform test can differentiate between A. Methanol and Ethanol B. CH_ 3 COOH and CH_ 3 CH_ 2 COOH C. Cyclohexene and cyclohexanone D. Diethyl ether and Pentan-3-one E. Anisole

' x ' is the product which is obtained from propanenitrile and stannous chloride in the presence of hydrochloric acid followed by hydrolysis. ' y ' is the product which is

The compound A, C_ 8 H_ 8 O_ 2 reacts with acetophenone to form a single product via cross-Aldol condensation. The compound A on reaction with conc. NaOH forms a substituted

Match the List-I with List-II \( List-I (Reagents) List-II (Name of reaction involving carbonyl compounds) A. NH_2 - NH_2, KOH I. Tollen's Test B. Ag(NH_3)_2OH II. Clemmensen

Match List - I with List - II. List - I List - II Reagents Reaction Name (Involving aldehydes) A. H_ 2 , Pd-BaSO_ 4 I. Etard Reaction B. SnCl_ 2 , HCl II. Rosenmund Reduction C.

An organic compound " P " of molecular formula C_ 6 H_ 12 O_ 3 gives positive Iodoform test but negative Tollen's test. When " P " is treated with dilute acid, it produces " Q ".

"P" is an optically active compound with molecular formula C_6 H_ 12 O . When " P " is treated with 2,4-dinitrophenylhydrazine, it gives a positive test. However, in presence of

Which among the following compounds give yellow solid when reacted with NaOI / NaOH ? Choose the correct answer from the options given below :

Aldol condensation is a popular and classical method to prepare α, β -unsaturated carbonyl compounds. This reaction can be both intermolecular and intramolecular. Predict which

The major product (P) in the following reaction is :

Number of molecules from below which cannot give ioddoform reaction is : Ethanol, Isopropyl alcohol, Bromoacetone, 2-Butanol, 2-Butanone, Butanal, 2-Pentanone, 3-Pentanone

An optically active alkyl halide \(C_4 H_9 Br\) [A] reacts with hot KOH dissolved in ethanol and forms alkene [B] as major product which reacts with bromine to give dibromide [C].

The product \((P)\) formed in the following reaction is :

Both acetaldehyde and acetone (individually) undergo which of the following reactions? A. Iodoform Reaction B. Cannizaro Reaction C. Aldol Condensation D. Tollen's Test E.

A molecule (" P ") on treatment with acid undergoes rearrangement and gives ("Q"). ("Q") on ozonolysis followed by reflux under alkaline condition gives (" R "). The structure of

Choose the correct answer from the options given below :

Aman has been asked to synthesise the molecule (x).He thought of preparing the molecule using an aldol condensation reaction. He found a few cyclic alkenes in his laboratory. He

Which of the following arrangements with respect to their reactivity in nucleophilic addition reaction is correct?

Given below are two statements : Consider the following reaction

Choose the correct answer from the options given below :

The major product of the following reaction is: CH_3 CH_2 CH=O [ reflux ] excess HCHO alkali ?

Residue (A)+HCl (dil) arrow Compound (B) Structure of residue (A) and compound (B) formed respectively is :

Paragraph I: An organic compound \(P\) with molecular formula \(C_9 H_ 18 O_2\) decolorizes bromine water and also shows positive iodoform test. \(P\) on ozonolysis followed by

Paragraph I: An organic compound \( P \) with molecular formula \( C _ 5 H_ 18 O _ 2 \) decolorizes bromine water and also shows positive iodoform test. \( P \) on ozonolysis

Match List I with List II \( List - I (Test) List - II (Observation) A. Br_2 water test I. Yellow orange or orange red precipitate formed B. Ceric ammonium nitrate test II.

Which of the following compound can give positive iodoform test when treated with aqueous \(KOH\) solution followed by potassium hypoiodite.

Which of the following compounds will give silver mirror with ammoniacal silver nitrate? A. Formic acid B. Formaldehyde C. Benzaldehyde D. Acetone Choose the correct answer from

Identify major product " \(X\) " formed in the following reaction :

Match List - I with List - II. \( (Test) (Identification) (A) Bayer's test MARKS (I) Phenol VIARKS (B) Ceric ammonium nitrate test (II) Aldehyde (C) Phthalein dye test R K (III)

Two moles of benzaldehyde and one mole of acetone under alkaline conditions using aqueous \(NaOH\) after heating gives \(x\) as the major product. The number of \(π\) bonds in the

Which among the following aldehydes is most reactive towards nucleophilic addition reactions?

In the Claisen-Schmidt reaction to prepare \(351 ~g\) of dibenzalacetone using \(87 ~g\) of acetone, the amount of benzaldehyde required is ______ g. (Nearest integer)

Identify ' \(A\) ' in the following reaction:

Given below are two statements : Statements I : Acidity of \(α\)-hydrogens of aldehydes and ketones is responsible for Aldol reaction. Statement II : Reaction between benzaldehyde

Identify the product in the following reaction :

The number of the correct reaction(s) among the following is ______

Match List – I with List –II. Choose the correct answer from options given below:

Identify the name reaction.

The product of the following reaction is P . The number of hydroxyl groups present in the product P is________.

m-chlorobenzaldehyde on treatment with 50 % KOH solution yields

This reduction reaction is known as:

The compound formed by the reaction of ethanal with semicarbazide contains _______ number of nitrogen atoms.

Identify the reagents used for the following conversion

From the compounds given below, number of compounds which give positive Fehling's test is Benzaldehyde, Acetaldehyde, Acetone, Acetophenone,Methanal, 4-nitrobenzaldehyde

In the following reactions, P, Q, R and S are the major products. The correct statement(s) about P, Q, R and S is(are)

The major products obtained from the reactions in List-II are the reactants for the named reactions mentioned in List-I. Match List-I with List-II and choose the correct option.

D - ( + ) - Glyceraldehyde → _ ii ) H _ 2 O / H ^ + _ iii ) HNO _ 3 ^ i ) HCN The products formed in the above reaction are

A in the above reaction is :

The value of x in compound &lsquo; D &rsquo; is _____

The mass of NH _ 3 produced when 131 . 8kg of cyclohexane carbaldehyde undergoes Tollen&rsquo;s test is _____ kg . (Nearest Integer) Molar mass of C = 12g / mol N = 14g / mol O =

&lsquo;A&rsquo; and &lsquo;B&rsquo; in the above reactions are:

The ratio x/y on completion of the above reaction is ______ .

. Match List I with List II : List I (Reagents used) List II (Compound with Functional group detected) A. Alkaline solution of copper sulphate and sodium citrate I. B. Neutral

Among the following the number of compounds which will give positive iodoform reaction is _____. (a) 1 -Phenylbutan- 2 -one (b) 2 -Methylbutan- 2 -ol (c) 3 -Methylbutan- 2 -ol (d)

The structures of major products A, B and C in the following reaction are sequence.

Number of isomeric compounds with molecular formula C _ 9 H _ 10 O which (i) do not dissolve in NaOH (ii) do not dissolve in HCl . (iii) do not give orange precipitate with 2, 4

Cyclohexylamine when treated with nitrous acid yields (P). On treating (P) with PCC results in (Q). When (Q) is heated with dil. NaOH we get (R) The final product (R) is:

The number of molecules which gives haloform test among the following molecules is :

Consider the following reaction Propanal + Methanal = → _ ( ii ) Δ ( iii ) NaCN ( iv ) H _ 3 O ^ + ^ ( i ) dil . NaOH P roductB _ ( C _ 5 H _ 8 O _ 3 ) The correct statement for

Which of the following compounds would give the following set of qualitative analysis? (i) Fehling&rsquo;s Test: Positive (ii) Na fusion extract upon treatment with sodium

Find out the major products from the following reaction sequence.

Match List I with List II. List I List II Reaction Reagents (A) Hoffmann Degradation (I) Conc. KOH, Δ (B) Clemmensen reduction (II) CHCl _ 3 , NaOH / H _ 3 O ^ + (C) Cannizzaro

Number of compounds giving (i) red colouration with ceric ammonium nitrate and also (ii) positive iodoform test from the following is _________

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 basic medium. Reason R: The high

&#39; R &#39; formed in the following sequence of reaction is:

Compound (X) undergoes following sequence of reactions to give the Lactone (Y) .

The number of stereoisomers formed in a reaction of (±)PhC(= O)C(OH)(CN)Ph with HCN is

Consider the following reaction sequence ​​​​​​​ The product &#39; B &#39; is

The value of x in compound ‘ D ’ is _____

The mass of NH _ 3 produced when 131 . 8kg of cyclohexane carbaldehyde undergoes Tollen’s test is _____ kg . (Nearest Integer) Molar mass of C = 12g / mol N = 14g / mol O =

‘A’ and ‘B’ in the above reactions are:

Which of the following compounds would give the following set of qualitative analysis? (i) Fehling’s Test: Positive (ii) Na fusion extract upon treatment with sodium

' R ' formed in the following sequence of reaction is:

Consider the following reaction sequence The product ' B ' is

The products formed in the following reaction, A and B are

Isobutyraldehyde on reaction with formaldehyde and K _ 2 CO _ 3 gives compound ' A '. Compound ' A ' reacts with KCN and yields compound ' B ', which on

The correct structure of product ' A ' formed in the following reaction,

' A ' and ' B ' respectively are A. → _ (2)Zn - H _ 2 O ^ (1) O _ 3 Ethane- 1, 2 -dicarbaldehyde + Glyoxal/Oxaldehyde B → _ (2)Zn - H _ 2 O ^ (1) O _ 3 5

The final product ' A ' in the following reaction sequence

Consider the given reaction, the product ' X ' is:

Which among the above compound/s does/do not form Silver mirror when treated with Tollen's reagent?

In Tollen's test for aldehyde, the overall number of electron(s) transferred to the Tollen's reagent formula [Ag ( NH _ 3 ) _ 2 ] ^ + per aldehyde group to form silver

The product "A" in the above reaction is:

A _ ( C _ 4 H _ 8 Cl _ 2 ) → _ 373K ^ Hydrolysis B _ ( C _ 4 H _ 8 O) B reacts with Hydroxyl amine but does not give Tollen's test. Identify A and B .