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 show 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 alkene on ozonolysis will give only acetaldehyde as a product?

A) Isobutylene

B) 2-Butene

C) 1-Butene

D) Propend

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

A) Tolen reagent

B) Benedict reagent

C) Acidified K2Cr2O7

D) Fehling solution

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

A) 2-Butanone

B) 3-Pentanone

C) 2-Pentanone

D) Acetone

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

A) 2 molecules of Ca(HCOO)2

B) None of these

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

D) 2 molecules of Ca(CH3COO)2

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5. Methyl ketones are characterized through:

A) Tollen’s reagent

B) Fehling’s solution

C) Iodoform test

D) Benedict’s reagent

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

A) Formaldehyde

B) n-butyraldehyde

C) Propionaldehyde

D) Acetaldehyde

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7. Aldehydes are the first oxidation product of:

A) Dihydric alcohol

B) Primary alcohols

C) Tertiary alcohols

D) Secondary alcohol

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

A) Tollen’s reagent

B) Fehiling solution

C) I2 + NaOH solution

D) benedict’s solution

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

A) Ethanal > Acetone > Propanal > Methanal

B) Ethanal < Acetone < Propanal < Methanal

C) Acetone > Ethanal > Methanal > Propanal

D) Methanal < Ethanal < Propanal < Acetone

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

A) Calcium acetate

B) Calcium formate

C) Formic acid

D) Acetic acid

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

A) Sodium nitroprusside test

B) Fehling solution test

C) Tollen’s reagent test

D) Schiff reagent test

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13. A plastic Bakelite is a compound of HCHO with

A) Benzene

B) Ammonia

C) Phenol

D) Hydrocarbon

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

A) Nucleophilic addition

B) Electrophilic addition

C) Electrophilic substitution

D) Nucleophilic substitution

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

A) CuO

B) Cu

C) Cu2O

D) Cu + Cu2O

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

A) Butanal

B) Butanoic acid

C) Ethanoic acid

D) 2-Butanone

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17. 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) acetone

B) Propanone

C) Acetic acid

D) Ethanol

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

A) Sodium Nitroprusside test

B) Tollen’s test

C) Fehling solution test

D) Benedict’s solution test

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

A) Aldol condensation

B) Polymerization

C) Reaction with HCN

D) cannizzaro reaction

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

A) CH3CHO

B) C6H5CHO

C) HCHO

D) CH3CH2CHO

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2nd Year Chemistry Chapter 12 MCQs Aldehydes and Ketones

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