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MDCAT Chemistry Aldehydes and Ketones Test Online

Mustansar KhanLast Updated: June 16, 2025

Chemistry Aldehydes and Ketones MCQS Online Test

MDCAT Chemistry Aldehydes and Ketones Chapter Online Test

Total Questions:	40
Time Allowed:	20 Minutes
Total Marks:	40
How to Attempt Test:	Please choose the right Option in MCQ-type question.
Test Helpful For:	MDCAT Entry Test Chemistry Online Test Interview Questions about Chemisttry All Universities Entrance Test Recruitments Tests

MDCAT Chemistry Aldehydes and Ketones Test

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1. Which test is positive for aldehydes but not ketones?

Tollens’ test

Baeyer’s test

Sodium metal test

Bromine water

2. Which of the following is a nucleophile in nucleophilic addition?

CN⁻

H₂O

H⁺

NO₂

3. Which compound is used in the silver mirror test?

AgNO₃ + NH₃

K₂Cr₂O₇ + H₂SO₄

CuSO₄ + NaOH

Na₂CO₃ + HCl

4. What is formed when acetaldehyde reacts with HCN?

Ester

Alcohol

Propanoic acid

Cyanohydrin

5. A ketone with five carbon atoms is:

Pentanal

Pentanone

Butanone

Hexanal

6. Which functional group is present in aldehydes?

–OH

–CHO

–C=O–

–COOH

7. Ketones can be prepared by:

Reduction of carboxylic acids

Oxidation of primary alcohols

Oxidation of secondary alcohols

Combustion of hydrocarbons

8. What is the product of oxidation of a ketone?

Primary alcohol

Carboxylic acid

Ether

No reaction

9. What is the IUPAC name of CH₃COCH₃?

Ethanal

Propanone

Acetaldehyde

Methanal

10. The product of reduction of propanal is:

Propanoic acid

Propanol

Ethanol

Propanone

11. Which of the following cannot be oxidized easily?

Benzaldehyde

Ethanal

Methanal

Propanone

12. What is formed when an aldehyde reacts with alcohol under acidic conditions?

Ester

Hemiacetal

Aldol

Ether

13. Which of the following is used for the detection of carbonyl group?

2,4-DNP

Lucas reagent

Fehling’s reagent

Benedict’s reagent

14. Aldehydes are more reactive than ketones because:

The carbonyl group is more accessible

They are aromatic

They have stronger C=O bonds

They have more electron-withdrawing groups

15. Aldehydes and ketones both contain:

Hydroxyl group

Amino group

Carbonyl group

Carboxyl group

16. Which of the following compounds is an aldehyde?

CH₃COCH₃

CH₃COOH

CH₃CH₂OH

CH₃CHO

17. Which carbon is the carbonyl carbon in aldehydes and ketones?

Carbon attached to –OH

Carbon double bonded to oxygen

Carbon in a ring

Carbon attached to –COOH

18. Which test can distinguish between aldehydes and ketones?

Barfoed's test

Benedict’s test

Sodium test

Ester test

19. What is the product when an aldehyde is reduced?

Ketone

Ether

Alcohol

Carboxylic acid

20. Which of the following is a secondary alcohol?

CH₃CH(OH)CH₃

CH₃OH

CH₃CH₂OH

CH₃CH₂CH₂OH

21. Which of the following shows nucleophilic addition reaction?

Alkyne

Aldehyde

Alkene

Alkane

22. Aldehydes can be prepared by:

Oxidation of primary alcohols

Reduction of esters

Hydration of alkenes

Oxidation of ketones

23. Which reagent can oxidize aldehydes to carboxylic acids?

FeCl₂

H₂/Ni

NaOH

Tollens' reagent

24. Which of the following gives a positive Fehling’s test?

Benzaldehyde

Acetone

Propanone

Methanal

25. The carbonyl carbon is:

Electrophilic

Neutral

Aromatic

Nucleophilic

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26. In Tollens' test, the silver mirror forms due to:

Reduction of aldehyde to alcohol

Oxidation of alcohol to ketone

Reduction of Ag⁺ to metallic Ag

Oxidation of silver

27. Which reagent is commonly used to reduce aldehydes to alcohols?

NaCl

H₂/Pt

KMnO₄

FeCl₃

28. Which of the following is the IUPAC name for CH₃CHO?

Acetone

Methanal

Propanal

Ethanal

29. Which reagent is used in the Wolff–Kishner reduction?

KMnO₄

NaBH₄

Hydrazine and base

H₂SO₄

30. Which of the following is oxidized to give acetic acid?

Acetaldehyde

Ethanol

Acetone

Propanone

31. Aldehydes and ketones react with hydrazine to form:

Hydrazones

Alcohol

Oximes

Esters

32. Which of the following is used in the preparation of aldehydes?

HCl

PCC (Pyridinium chlorochromate)

NaBH₄

Grignard reagent

33. Which is more stable: aldehyde or ketone?

Both equal

Ketone

Aldehyde

Depends on pH

34. Which of the following is a product of base-catalyzed nucleophilic addition to a ketone?

Alkane

Alcohol

Oxime

Cyanohydrin

35. Ketones resist oxidation because:

They lack a hydrogen on the carbonyl carbon

They are already fully oxidized

They have stable π bonds

They are less reactive than aldehydes

36. Reduction of a ketone gives:

Aldehyde

Primary alcohol

Secondary alcohol

Carboxylic acid

37. Which is more reactive toward nucleophilic addition?

Aldehydes

Carboxylic acids

Ketones

Alkanes

38. Which of the following is NOT a nucleophilic addition reaction?

Dehydration to alkene

Formation of cyanohydrins

Reaction with alcohols

Hydrogenation to alcohol

39. Which group is common in both aldehydes and ketones?

–COOH

–CO–

–CH₂–

–OH

40. Which of the following is a ketone?

CH₃CHO

CH₃COOH

CH₃COCH₃

CH₃CH₂OH

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Mustansar KhanLast Updated: June 16, 2025

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MDCAT Chemistry Aldehydes and Ketones Test Online

Chemistry Aldehydes and Ketones MCQS Online Test

MDCAT Chemistry Aldehydes and Ketones Chapter Online Test

MDCAT Chemistry Aldehydes and Ketones Test

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Chemistry Aldehydes and Ketones MCQS Online Test

MDCAT Chemistry Aldehydes and Ketones Chapter Online Test

MDCAT Chemistry Aldehydes and Ketones Test

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