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NEET Aldehydes and Ketones PYQs with Solutions

484 previous year questions from Aldehydes and Ketones (NEET UG Chemistry) with answers and solutions. Numbered list, year tags, and one-tap solutions — built for serious JEE / NEET practice.

484 questionsChemistry2005–2026Answers + solutions

About Aldehydes and Ketones PYQs

Aldehydes and Ketones has 484 previous year questions in the Quantrex Academy NEET UG Chemistry bank. The 220 questions in this list come from NEET (183), MHT CET Medical (19) and JIPMER (18), spanning 2005 to 2026. Each question opens on its own page with the options, the correct answer and the worked solution where available.

NEET Aldehydes and Ketones PYQs with Solutions

About Aldehydes and Ketones PYQs

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Aldehydes and Ketones questions with solutions

Base catalyzed aldol condensation occurs with

Aromatic aldehydes are less reactive than the aliphatic aldehydes in nucleophilic addition reaction this is due to

Identify a final product obtained when Pent-3-enenitrile is treated with AlH(i-Bu)_2 followed by acid hydrolysis.

When a mixture of an aldehyde and Fehling solution is boiled in hot water, a red precipitate is formed. Here the obtained red precipitate is of -

Which of the following reagents gives the same reduction product with propionaldehyde and acetone ?

Which of the following statements regarding the haloform test is NOT correct?

Which is the best reagent for the following conversion? CH_3-CH=CH-CH_2-CHO CH_3-CH=CH-CH_2-CH_2-OH

Aldehydes containing at least one α -hydrogen atom undergo a reaction in presence of dilute aq. NaOH to form β -hydroxyl aldehyde. Identify the reaction.

Which of the following reagents converts acid chloride to aldehyde selectively?

An organic compound 'A' ( C_3H_6O ) gives a positive iodoform test but does not reduce Tollens' reagent. Identify the compound 'A':

Which one of the following compounds, on reaction with hydrogen cyanide (HCN), gives an optically active cyanohydrin?

What is metaldehyde?

Which of the following reagents reacts with both aldehydes and ketones?

Which of the following compounds will not undergo aldol condensation?

Identify a catalyst used in Stephen reaction from the following.

What is the product obtained when Pent-3-enenitrile is treated with DIBAL-H followed by acid hydrolysis?

Which of the following undergoes Haloform reaction?

Benzaldehyde is converted to benzyl alcohol by

Which of the following reactions converts >C=O to >CH_2 ? (A) Rosenmund's reaction (B) Aldol condensation (C) Clemmensen's reduction (D) Wolf-Kishner reduction Choose the correct

aligned CH_2=CH-CHO ? CH_2= & CH & -CH_2-OH aligned Suitable reagent for conversion of following reaction?

Which of the following will not be formed when calcium acetate is distilled with calcium formate?

In the reaction, The major product formed is

Cannizzaro reaction is not shown by

The product of acid hydrolysis of (P) and (Q) can be distinguished by

Which of the following is crossed aldol product in the reaction? CH_3 CHO+CH_3 CH_2 CHO [25^ ∘ C] OH^ - ^ P '

Choose the correct alkyne and reagents for the preparation of

Clemmensen reduction of a ketone is carried out in the presence of which of the following?

CH_3 CHO+HCHO [ Heat ] Dil. NaOH A [H_3 O^ + ] HCN B The structure of compound B is

The compound which is not formed during the dry distillation of a mixture of calcium formate and calcium acetate is

Which of the following reagents converts both acetaldehyde and acetone to alkanes ?

In which of the following pairs, both molecules possess dipole moment ?

The reaction, C_6 H_5 CHO+CH_3 COOC_2 H_5 C_6 H_5 CH=CHCOOC_2 H_5 , is called

Which one of the following reactions is called Rosenmund reaction?

Which of the following does not reduce Fehling's solution?

When dihydroxy acetone reacts with \(HIO_4\), the product is/are

The major organic product formed from the following reaction [ (ii) LiAlH_4 (iii) H_2 O] (i) CH_3 NH_2 is

CH_3 CH_2 C ≡ CH R butanone -2 . R is

In the reaction of aldehydes and ketones with hydrogen cyanide (HCN), what is the role of the cyanide ion (CN-)?

What role does concentrated alkali play in the Cannizzaro reaction?

When is the dehydrogenation method suitable for preparing aldehydes and ketones?

Which class of aldehydes does not respond to Fehling's test?

What is the role of acid in the addition reaction of ammonia and its derivatives with aldehydes and ketones?

What type of compounds are formed in the Aldol condensation reaction?

What reagent is used in Tollens' test to detect aldehydes?

Which aldehyde is commonly used to preserve biological specimens and in the production of bakelite?

Give an example of a compound that adds fragrance to nature and is derived from vanilla beans.

What is the purpose of using a catalyst in the Rosenmund reduction?

What is the final product obtained after the hydrolysis of benzal chloride?

In which type of solvents, such as benzene, ether, methanol, and chloroform, are aldehydes and ketones generally fairly soluble?

What type of reaction is the addition of ammonia and its derivatives to aldehydes and ketones?

Which functional group in aldehydes is responsible for the reaction with Tollens' reagent?

What factor influences the position of the equilibrium in the reaction of sodium hydrogensulphite with aldehydes and ketones?

What does the addition of sodium hydrogen sulphide form when it reacts with aldehydes and ketones?

What is the name of the intermediate compound formed when aldehydes react with monohydric alcohol in the presence of dry hydrogen chloride?

In addition to flavouring agents, for what other purpose are some families of aldehydes, ketones, and carboxylic acids manufactured, according to the paragraph?

What heavy metal catalysts are commonly used in the dehydrogenation method for producing aldehydes and ketones?

Besides sodium hypobromite, what other halogen reagent can be used for the haloform reaction to detect specific functional groups?

Where does the equilibrium position generally lie when sodium hydrogen sulfite reacts with most aldehydes?

What can benzylidene diacetate be hydrolyzed into, as mentioned in the paragraph?

What are gem-dialkoxy compounds known as, which are formed when hemiacetals react with one more molecule of alcohol?

Which of the following is NOT a common role of the carbonyl group in electrophilic substitution reactions?

In what important processes of life do aldehydes, ketones, and carboxylic acids play a significant role?

What is the primary difference in the oxidation reactions between aldehydes and ketones?

Which type of reaction is the Rosenmund reduction classified as?

What is the practical application of naturally occurring aldehydes and ketones mentioned in the paragraph?

Why is the addition of hydrogen cyanide (HCN) to aldehydes and ketones catalysed by a base?

What is the general name for the products of the Aldol condensation reaction?

How can the hydrogen sulfite addition compound, formed by the reaction of sodium hydrogensulphite with aldehydes and ketones, be converted back to the original carbonyl compound?

What is the result of the reduction of the carbonyl group of aldehydes and ketones with zinc-amalgam and concentrated hydrochloric acid?

What does the Rosenmund reduction primarily involve?

What type of reaction is involved in Tollens' test?

What is the final product formed when an aldehyde reacts with Tollens' reagent?

What is the colour change observed during a positive Tollens' test?

Which compound, found in cinnamon, is known for its pleasant fragrance?

How do the reactivity of aldehydes and ketones change with the number of alkyl groups attached to the carbonyl carbon?

What role does the base play in the catalysis of the reaction between aldehydes/ketones and hydrogen cyanide (HCN)?