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

A) CnH2n+2

B) CnH2n+1O2

C) CnH2nO

D) CnH2nO2

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

A) 2 molecules of Ca(HCOO)2

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

C) None of these

D) 2 molecules of Ca(CH3COO)2

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

A) HCHO

B) CH3CHO

C) CH3CH2CHO

D) C6H5CHO

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4. Methyl ketones are characterized through:

A) Tollen’s reagent

B) Iodoform test

C) Fehling’s solution

D) Benedict’s reagent

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

A) Propend

B) 2-Butene

C) 1-Butene

D) Isobutylene

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

A) 2-Butanone

B) Acetone

C) 3-Pentanone

D) 2-Pentanone

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

A) Butanoic acid

B) 2-Butanone

C) Ethanoic acid

D) Butanal

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

A) Fehiling solution

B) Tollen’s reagent

C) benedict’s solution

D) I2 + NaOH solution

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

A) Tolen reagent

B) Benedict reagent

C) Fehling solution

D) Acidified K2Cr2O7

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

A) Reaction with HCN

B) Aldol condensation

C) cannizzaro reaction

D) Polymerization

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

A) Electrophilic addition

B) Nucleophilic substitution

C) Nucleophilic addition

D) Electrophilic substitution

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

A) Benedict’s solution test

B) Tollen’s test

C) Sodium Nitroprusside test

D) Fehling solution test

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

A) Sodium nitroprusside test

B) Schiff reagent test

C) Fehling solution test

D) Tollen’s reagent test

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14. 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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15. A plastic Bakelite is a compound of HCHO with

A) Hydrocarbon

B) Benzene

C) Phenol

D) Ammonia

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16. Aldehydes are the first oxidation product of:

A) Tertiary alcohols

B) Dihydric alcohol

C) Primary alcohols

D) Secondary alcohol

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

A) Calcium acetate

B) Formic acid

C) Calcium formate

D) Acetic acid

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

A) Cu2O

B) CuO

C) Cu

D) Cu + Cu2O

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

A) n-butyraldehyde

B) Propionaldehyde

C) Acetaldehyde

D) Formaldehyde

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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) Propanone

B) Ethanol

C) acetone

D) Acetic acid

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2nd Year Chemistry Chapter 12 MCQs Aldehydes and Ketones

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