Aldehydes, Ketones and Carboxylic Acids MCQ for Class 12 Chemistry Chapter 12 with Answers

Find here the NCERT chapter-wise Multiple Choice Questions from Class 12 Chemistry book Chapter 12 Aldehydes, Ketones and Carboxylic Acids with Answers Pdf free download. This may assist you to understand and check your knowledge about the chapters. Students also can take a free test of the Multiple Choice Questions of Aldehydes, Ketones and Carboxylic Acids. Each question has four options followed by the right answer. These MCQ Questions are selected supported by the newest exam pattern as announced by CBSE.

MCQ Questions for Class 12 Chemistry With Answers

Q1. Which of the following acids does not form anhydride?

(i) Formic add
(ii) Acetic acid
(iii) Propionic add
(iv) n-butyric acid

(i) Formic add

Q2. The reagent which does not react with both, acetone and benzaldehyde.

(i) Sodium hydrogensulphite
(ii) Phenyl hydrazine
(iii) Fehling’s solution
(iv) Grignard reagent

(iii) Fehling’s solution

Q3. The oxidation of toluene to benzaldehyde by chromyl, chloride is called

(i) Etard reaction
(ii) Riemer-Tiemann reaction
(iii) Wurtz reaction
(iv) Cannizzaro’s reaction

(i) Etard reaction

Q4. Which of the following have pleasant smell?

(i) Methanal
(ii) Propanal
(iii) Ethanal
(iv) Hexanal

(iv) Hexanal

Q5. Trans-esterification is a reaction between

(i) two ester molecules
(ii) alcohol and carboxylic acid
(iii) alcohol and ether
(iv) alcohol and ester.

(iv) alcohol and ester

Q6. Which of the following compounds wilt give butanone on oxidation with alkaline KMnO4 solution?

(i) Butan-1-ol
(ii) Butan-2-ol
(iii) Both of these
(iv) None of these

(ii) Butan-2-ol

Q7. The addition of HCN to carbonyl compounds is an example of

(i) nucleophilic addition
(ii) electrophilic addition
(iii) free radical addition
(iv) electromeric addition

(i) nucleophilic addition

Q8. Which one of the following on oxidation gives a ketone ?

(i) Primary alcohol
(ii) Secondary alcohol
(iii) Tertiary alcohol
(iv) All of these

(ii) Secondary alcohol

Q9. Methyl ketones are usually characterised through

(i) Tollen’s reagent
(ii) Iodoform test
(iii) Schiff’stest
(iv) Benedict solution test.

(ii) Iodoform test

Q10. Primary and secondary alcohols on action of reduced coppergive

(i) Aldehydes and ketones respectively
(ii) Ketones and aldehydes respectively
(iii) Only aldehydes
(iv) Only ketones

(i) Aldehydes and ketones respectively

Q11. HVZ reaction is used to prepare

(i) ß-haloacid
(ii) α-haloacid
(iii) α, ß-unsaturated add
(iv) None of these

(ii) α-haloacid

Q12. Which of the following will not give aldol condensation?

(i) Phenyl acetaldehyde
(ii) 2-Methylpentanal
(iii) Benzaldehyde
(iv) 1-Phenylpropanone

(iii) Benzaldehyde

Q13. Which of the following is not used in the preparation of ketone?

(i) Oxidation of secondary alcohols
(ii) Dehydrogenation of 2° alcohol
(iii) Pyrolysis of calcium acetate
(iv) Acid hydrolysis of alkyl cyanide

(iv) Acid hydrolysis of alkyl cyanide

Q14. Acetaldol is a condensation product of

(i) two molecules of ethanal
(ii) two molecules of propanone
(iii) ethanal and methanal
(iv) ethanal and propanone.

(i) two molecules of ethanal

Q15. The product of hydrolysis of ozonide of 1-butene are

(i) ethanol only
(ii) ethanal and methanal
(iii) propanal and methanal
(iv) methanal only

(iii) propanal and methanal

Q16. Which of the following forces explain the boiling point of aldehydes and ketones?

(i) Hydrogen bonding
(ii) van der Waal’s forces
(iii) Dipole-dipole attraction
(iv) None of these

(iii) Dipole-dipole attraction

Q17. What is the test to differentiate between penta-2-one and pentan-3-one?

(i) Iodoform test
(ii) Benedict’s test
(iii) Fehling’s test
(iv) Aldol condensation test

(i) Iodoform test

Q18. Benzaldehyde can be prepared by the hydrolysis of

(i) Benzyl chloride
(ii) Benzal chloride
(iii) Benzotri chloride
(iv) Benzo nitrile.

(ii) Benzal chloride

Q19. Hydrocarbons are formed when aldehydes and ketones are reacted with amalgamated zinc and conc. HCl. The reaction is called

(i) Cannizzaro reaction
(ii) Clemmensen reduction
(iii) Rosenmund reduction
(iv) Wolff-Kishner reduction

(ii) Clemmensen reduction

Q20. Which among the following is most reactive to give nucleophilic addition?

(i) FCH₂CHO
(ii) ClCH₂CHO
(iii) BrCH₂CHO
(iv) ICH₂CHO

(i)

Q21. When propanal reacts with 2-methylpropanal in presence of NaOH, four different products are formed. The reaction is known as

(i) Aldol condensation
(ii) Cross aldol condensation
(iii) Cannizzaro reaction
(iv) HVZ condensation

(ii) Cross aldol condensation

Q22. Which compound is obtained when acetaldehydes are treated with dilute solution of caustic soda?

(i) Sodium acetate
(ii) Resinous mass
(iii) Aldol
(iv) Ethyl acetate

(iii) Aldol

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Aldehydes, Ketones and Carboxylic Acids MCQ Questions for Class 12 Chemistry Chapter 12 with Answers