2nd Year Chemistry Chapter 12 MCQs Aldehydes and Ketones

Here you can get the 2nd Year Chemistry Chapter 12 MCQs Aldehydes and Ketones. This chapter is about Aldehydes and Ketones. The carbonyl group is bonded to at least one hydrogen atom in Aldehydes while the carbonyl group is bonded to two carbon atoms in Ketones. They have laboratory and industrial preparation methods. The carbonyl group shows different reactivity including Nucleophilic Addition Reactions, Acid-Catalyzed Addition Reactions, Reduction Reactions, and Oxidation Reactions. Aldehydes and Ketones can also be identified through different detection tests. They have several uses. Now move towards the MCQs section to prepare for the entrance test. Solve the quiz and check out the answers.

2nd Year Chemistry Chapter 12 MCQs Aldehydes and Ketones

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2nd Year Chemistry Chapter 12

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1. Which of the following types of aldehydes give Cannizzaro reaction?

A) Formaldehyde

B) Propionaldehyde

C) Acetaldehyde

D) n-butyraldehyde

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2. In order to obtain acetaldehyde from calcium acetate, it should be heated with

A) Calcium formate

B) Calcium acetate

C) Acetic acid

D) Formic acid

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3. What is the correct order of increasing boiling points in the following series?

A) Ethanal > Acetone > Propanal > Methanal

B) Acetone > Ethanal > Methanal > Propanal

C) Ethanal < Acetone < Propanal < Methanal

D) Methanal < Ethanal < Propanal < Acetone

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4. Which of the following tests is only shown by ketones?

A) Sodium Nitroprusside test

B) Fehling solution test

C) Benedict’s solution test

D) Tollen’s test

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5. The formation of cyanohydrins from ketones is an example of:

A) Electrophilic substitution

B) Nucleophilic substitution

C) Nucleophilic addition

D) Electrophilic addition

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6. Methyl ketones are characterized through:

A) Fehling’s solution

B) Benedict’s reagent

C) Tollen’s reagent

D) Iodoform test

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7. The oxidation product of ethanol / (K2Cr2O7-H2SO4) is treated first with calcium and then subjected to distillation under dry conditions, the final product is

A) Acetic acid

B) Propanone

C) Ethanol

D) acetone

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8. Which alkene on ozonolysis will give only acetaldehyde as a product?

A) Propend

B) Isobutylene

C) 2-Butene

D) 1-Butene

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9. Which of the following is a strong oxidizing agent:

A) Acidified K2Cr2O7

B) Tolen reagent

C) Benedict reagent

D) Fehling solution

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10. Which of the following reagent can provide a distinction between propionaldehyde and acetaldehyde?

A) Tollen’s reagent

B) benedict’s solution

C) Fehiling solution

D) I2 + NaOH solution

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11. Which of the following is an example of an acid-catalyzed reaction?

A) Aldol condensation

B) Reaction with HCN

C) cannizzaro reaction

D) Polymerization

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12. Which of the following tests is shown by ketones?

A) Tollen’s reagent test

B) Sodium nitroprusside test

C) Schiff reagent test

D) Fehling solution test

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13. Which ketone will yield tertiary butyl alcohol on treatment with CH3MgBr followed by hydrolysis

A) Acetone

B) 2-Butanone

C) 2-Pentanone

D) 3-Pentanone

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14. Both aldehydes and ketones can be represented by the general formula

A) CnH2n+1O2

B) CnH2nO

C) CnH2n+2

D) CnH2nO2

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15. For the preparation of CH₃CHO forms calcium acetate, we need:

A) 2 molecules of Ca(CH3COO)2

B) None of these

C) 1 mole of Ca(CH3COO)2 and 1 molecule of Ca(HCOO)2

D) 2 molecules of Ca(HCOO)2

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16. When acetaldehyde is heated with Fehling’s solution, it gives a red precipitate of:

A) Cu + Cu2O

B) Cu2O

C) CuO

D) Cu

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17. The least reactive aldehyde towards nucleophilic addition reaction among the following is

A) CH3CHO

B) C6H5CHO

C) CH3CH2CHO

D) HCHO

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18. A plastic Bakelite is a compound of HCHO with

A) Hydrocarbon

B) Benzene

C) Ammonia

D) Phenol

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19. Aldehydes are the first oxidation product of:

A) Dihydric alcohol

B) Tertiary alcohols

C) Secondary alcohol

D) Primary alcohols

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20. Which of the following gives a positive silver mirror test?

A) Butanal

B) 2-Butanone

C) Ethanoic acid

D) Butanoic acid

Your score is

2nd Year Chemistry Chapter 12 MCQs Aldehydes and Ketones

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