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

A) Nucleophilic addition

B) Electrophilic substitution

C) Nucleophilic substitution

D) Electrophilic addition

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2. Methyl ketones are characterized through:

A) Fehling’s solution

B) Tollen’s reagent

C) Iodoform test

D) Benedict’s reagent

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

A) CH3CH2CHO

B) CH3CHO

C) C6H5CHO

D) HCHO

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

A) CuO

B) Cu + Cu2O

C) Cu2O

D) Cu

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

A) Reaction with HCN

B) cannizzaro reaction

C) Polymerization

D) Aldol condensation

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

A) Fehling solution

B) Tolen reagent

C) Acidified K2Cr2O7

D) Benedict reagent

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

A) Fehling solution test

B) Schiff reagent test

C) Sodium nitroprusside test

D) Tollen’s reagent test

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

A) Propionaldehyde

B) Acetaldehyde

C) n-butyraldehyde

D) Formaldehyde

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9. Aldehydes are the first oxidation product of:

A) Tertiary alcohols

B) Dihydric alcohol

C) Primary alcohols

D) Secondary alcohol

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

A) Methanal < Ethanal < Propanal < Acetone

B) Acetone > Ethanal > Methanal > Propanal

C) Ethanal < Acetone < Propanal < Methanal

D) Ethanal > Acetone > Propanal > Methanal

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

A) 1-Butene

B) Propend

C) 2-Butene

D) Isobutylene

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

A) CnH2nO2

B) CnH2nO

C) CnH2n+2

D) CnH2n+1O2

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

A) Butanal

B) 2-Butanone

C) Butanoic acid

D) Ethanoic acid

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

A) None of these

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

C) 2 molecules of Ca(HCOO)2

D) 2 molecules of Ca(CH3COO)2

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

A) Benedict’s solution test

B) Fehling solution test

C) Sodium Nitroprusside test

D) Tollen’s test

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16. A plastic Bakelite is a compound of HCHO with

A) Phenol

B) Ammonia

C) Benzene

D) Hydrocarbon

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

A) 2-Butanone

B) 2-Pentanone

C) Acetone

D) 3-Pentanone

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

A) I2 + NaOH solution

B) Tollen’s reagent

C) benedict’s solution

D) Fehiling solution

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

A) Calcium formate

B) Calcium acetate

C) Formic acid

D) Acetic acid

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20. 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) Ethanol

B) acetone

C) Acetic acid

D) Propanone

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2nd Year Chemistry Chapter 12 MCQs Aldehydes and Ketones

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