Aldehydes & Ketones: JEE Questions & Solutions

An organic compound "P" of molecular formula C₆H₁₂O₃ gives positive Iodoform test but negative Tollen's test. When "P" is treated with…

Match List - I with List - II. | List - I (Reagents) | List - II (Reaction Name, involving aldehydes) | | --- | --- | | A. H₂, Pd-BaSO₄ |…

Match the LIST-I with LIST-II | LIST-I (Reagents) | LIST-II (Name of reaction involving carbonyl compounds) | |---|---| | (A) NH₂-NH₂, KOH…

The compound A, C₈H₈O₂, reacts with acetophenone to form a single product via cross-aldol condensation. The compound A on reaction with…

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

Which of the following statements are TRUE about Haloform reaction?: A. Sodium hypochlorite reacts with KI to give KOI. B. KOI is a…

Iodoform test can differentiate between A. Methanol and Ethanol B. CH₃COOH and CH₃CH₂COOH C. Cyclohexene and cyclohexanone D. Diethyl ether…

A student is given one compound among the following compounds that gives positive test with Tollen's reagent. The compound is:

Given below are two statements: Statement I: Cross aldol condensation between two different aldehydes will always produce four different…

The unsaturated ether on acidic hydrolysis produces carbonyl compounds as shown below: CH₃-CH=CH-O-CH=CH₂ → H₃O⁺ CH₃-CH₂-CH=O and O=CH-CH₃…

Consider the following reactions giving major product. Identify the correct reaction.

Given below are the four isomeric compounds P, Q, R, S: P: Aromatic compound containing an -OH group Q: Aromatic compound containing an…

The compounds which give positive Fehling's test are: Choose the CORRECT answer from the options given below:

Propanal, CH₃CH₂CH=O, is refluxed with excess HCHO in the presence of alkali. The major product of this reaction is:

Given below are two statements: Statement (I): In the case of formaldehyde, K is about 2280, due to small substituents, hydration is…

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

Aman has been asked to synthesise the molecule x, 1-(cyclopent-1-en-1-yl)ethan-1-one, in which an acetyl group -CO-CH₃ is attached to C-1…

The product (A) formed in the following reaction sequence is:

Match List - I with List - II. | List - I | List - II | |---|---| | (A) RCN → [ (ii) H₃O⁺](i) SnCl₂, HCl RCHO | (I) Etard reaction | | (B)…

Both acetaldehyde and acetone (individually) undergo which of the following reactions? A. Iodoform Reaction B. Cannizzaro Reaction C. Aldol…

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

Given below are two statements: Statement I: Vanillin will react with NaOH and also with Tollen’s reagent. Statement II: Vanillin will…

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

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

An organic compound (X) with molecular formula C₃ H₆ O is not readily oxidised. On reduction it gives C₃ H₈ O (Y) which reacts with HBr to…

"P" is an optically active compound with molecular formula C₆H₁₂O. When "P" is treated with 2,4-dinitrophenylhydrazine, it gives a positive…

Identify the structure of the final product (D) in the following sequence of the reactions: Total number of sp² hybridised carbon atoms in…

When undergoes intramolecular aldol condensation, the major product formed is:

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

m-Chlorobenzaldehyde on treatment with 50% KOH solution yields:

Identify the reagents A, B and C used for the following conversion: The starting material is a cyclohexane ring carrying a -CH₂COOCH₃ group…

In the given reactions, identify the reagent A and reagent B: C₆H₅-CH₃ → [ 273-283 K ] A + (CH₃CO)₂O [Intermediate] → H₃O⁺ C₆H₅-CHO…

Which of the following compounds can give a positive iodoform test when treated with aqueous KOH solution followed by potassium hypoiodite?

Which of the following compounds will give a silver mirror with ammoniacal silver nitrate? Statements: (A) Formic Acid (B) Formaldehyde (C)…

Given below are two statements: Statement I: H₂N-CO-CH₂-CH₂-CO-CH₃ (4-oxopentanamide) under Clemmensen reduction conditions will give…

A trisubstituted compound ‘A’, C₁₀H₁₂O₂, gives neutral FeCl₃ test positive. Treatment of compound ‘A’ with NaOH and CH₃Br gives C₁₁H₁₄O₂,…

Cyclohexylamine when treated with nitrous acid yields (P). On treating (P) with PCC results in (Q). When (Q) is heated with dilute NaOH, we…

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

Number of isomeric compounds with molecular formula C₉H₁₀O which (i) do not dissolve in NaOH (ii) do not dissolve in HCl. (iii) do not give…

The structures of the major products A, B and C in the following reaction sequence are: CH₃CH₂CH₂CH(CH₃)CHO → [ NaCN, H₂O]NaHSO₃, dil. HCl…

Find out the major product from the following reaction:

In the reaction given below: The product ‘X’ is:

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R. Assertion A: can be subjected to…

The major product formed in the following reaction is.

The value of x in compound D is