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ECAT Chemistry Aldehydes and Ketones Test Online

Mustansar KhanLast Updated: April 19, 2025

Chemistry Aldehydes and Ketones MCQS Online Test

ECAT Chemistry Aldehydes and Ketones Chapter Online Test

Total Questions:	52
Time Allowed:	25 Minutes
Total Marks:	52
How to Attempt Test:	Please choose the right Option in MCQ-type question.
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ECAT Chemistry Aldehydes and Ketones Test

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Page 1 of 3

1. Aldehydes are oxidized to

Ketones

Carboxylic acids

Salts of carboxylic acids

Alcohols

2. Which is true about reaction of ammonia derivatives with carbonyl compounds?

It is acid catalyzed reaction

It is base catalyzed reaction

It is an addition reaction

It is an elimination reaction

3. Aldehydes can be distinguished from ketones by using

Resorcinol

Schiff’s reagent

Conc. H₂SO₄

Anhy, ZnCl₂

4. We can distinguish between ethanol and propanal by

I₂ in NaoH

Tollen’s reagent

Sod nitroprusside

All react with both

5. When butanone is oxidized the product is

Formic acid

Acetic acid

Both formic and acetic acid

None of these

6. Which of the following does not react with phenyl hydrazine?

Ethenel

Ethanol

Acetophenone

Acetone

7. In acid catalyzed nucleophile addition reactions of carbonyl group acid

It decrease the electrophile character carbon of carbonyl group

It increase the electrophile character of carbon of carboxyl group

All are possible

Increased the nucleophile character of reagent

8. Ethers can act as

Acids

Bases

They are just ethers

Salts

9. A nucleophilic reagent will readily Attack

Ethylene

Ethanol

Ethylamine

Ethanol

10. Formalin is _________ solution of formaldehyde in water

60%

10%

40%

20%

11. Methanol in the presence of 50% NaOH gives

Salt and water

An aldol

An alcohol and acid

Iodoform

12. Aromatic aldehydes undergo disproportion in presence of sodium or potassium hydroxide to give corresponding alcohol and acid. The reaction is known as

Friedel Craft reaction

Cannizzaro reaction

Claisen reaction

Wurtz reaction

13. Wacker method involves the conversion of alkene using PdCl₂ into corresponding

Ether

Aldehyde

Ketone

Alcohol

14. Methyl ketones can be characterized by

Oxidation

Iodoform test

Sod nitroprusside test

Silver mirror test

15. In the light of IUPAC system, aldehydes are names as

Alkanols

Alkanals

Alkenes

Alkanes

16. Propyne on hydrolysis in presence of H₂SO₄ and HgSO₄ gives:

Formaldehyde

Acetone

None

Acetaldehyde

17. Point out the use of formaldehyde among the following

For manufacturing of resins

40% aqueous solution (Formaline) as

All above

For manufacturing of dyes

18. The word ‘al’ is used for

Alkane

Ketone

Aldehyde

Alcohol

19. Tollen’s reagent is

Ammonical silver bromide

Ammonical cuprous oxide

Ammonical cuprous chloride

Ammonical silver nitrate

20. Which one of the following cannot give halo form reaction?

Proparonon

3-Pentanone

2-Pentanone

Acetone

21. Which is not true about halo form reaction

It is used to distinguish Ethan from methanol

It is used to distinguish acetaldehyde from other aldehydel

It is used to distinguish aldehyde and ketone

It is used to distinguish between athanol from other primary alcohols

22. Ketones are prepared by the oxidation of

Tertiary alcohol

Secondary alcohol

None of these

Primary alcohol

23. Which of the following reactions is used for detecting presence of carbonyl group?

Reaction with hydroxylamine

All

Reaction with hydrazine

Reaction with phenyl hydrazine

24. Isopropyl alcohol on oxidation forms

Acetaldehyde

Acetone

Ethylene

Ether

25. The conservation of acetaldehyde into lactic acid takes place by

Reaction with HCN followed by reaction

Treatment with HCN followed by oxidation

Oxidation of acetaldehyde followed by basic hydrolysis

Reaction with HCN followed by acid hydrolysis

Page 2 of 3

26. Benzene can be obtained from phenol by reaction with

H₂

Acetyl chloride

HNO₃

27. Calcium acetate when dry distilled gives

Acetic anhydride

Acetone

Acetaldehyde

Formaldehyde

28. Which of the following gives iodoform on heating with a solution of I₂ containing Na₂CO₃

Acetone

Ethyl alcohol as well as acetone

Methyl alcohol

Ethyl alcohol

29. Aldol condensation is a reaction of cold turbid solution of alkali with

All aldehydes

Aldehydes and ketones with β – hydrogen

All ketones

Aldehydes with α – hydrogen

30. Which of the following does not turn Schiff’s reagent to pink?

Benzaldehyde

Acetone

Formaldehyde

Methyl chloride

31. Which of the following reagents will react with the aldehyde and ketones?

Benedict’s reagent

Tollens’ reagent

Grignard’s reagent

Fehling reagent

32. Aldehydes are produce in atmosphere by

Reduction of alkenes

Oxidation of secondary alcohols

Reaction of oxygen atoms with hydrocarbons

Reaction of oxygen atoms with ozone

33. Silver mirror test is used for

Alcohols

Acids

Esters

Aldehydes

34. At room temperature formaldehyde is

Solid

Liquid

None of these

Gas

35. In aldol condensation the reacting molecules are

Same

May or may no

None of these

Different

36. Which one can give aldol condensation reaction?

Benzaldehyde

Formaldehyde

2-2 dimethyl propanal

Acetone

37. Ketones are prepare by the oxidation of

3° – alcohols

2° – alcohols

Primary alcohols

None of these

38. Acetaldehyde is prepare from ethene by

Reduction

Hydration

Hydrogenation then oxidation

Air oxidation

39. Which reaction is used to identify carbonyl compounds?

Reaction with hydroxylamine

2, 4 dinitrophenyl hydrazine

Hydrazine

With phenyl hydrazine

40. Which one does not have an X-hydrogen?

Acetaldehyde

Methanol

Acetone

Benzylaldehyde

41. We can separate the carbonyl compounds from alcohols by

By addition of sodium bisulphate

Condensation reactions

Reduction

Oxidation

42. The homologous series of both aldehyde and ketones have general formula.

43. The compound obtained by the reduction of propionaldehyde by amalgamated zinc and concentrated HCI is

Propane

Propene

All

Propanol

44. Ketones are reduced to

3° – alcohols

Carboxylic acids

2° – alcohols

1° – alcohols

45. Cannizzaro reaction is not given by

Benzaldehyde

Trimethyl acetaldehyde

Acetaldehyde

Formaldehyde

46. Which of the following will have the highest boiling point?

Methanol

Propanal

2 – Hexanone

Ethanol

47. On Heating acetaldehyde with ammonical silver nitrate solution, we get:

CH₃OH

HCHO

Silver mirror

Silver acetate

48. When vapours of isopropyl alcohol are passed over heated copper, the major product obtained is

Acetone

Propane

Acetaldehyde

Propylene

49. The carbonyl group has a carbon which is

SP² – hybridized

None of these

SP – hybridized

SP³ hybridized

50. Which of the following Compounds which will not give iodoform test on treatment with ½ NaOH?

3 – Pentanone

Butanone

Acetaldehyde

Acetone

Page 3 of 3

51. Which of the following alcohols cannot be produced by treatment of aldehydes or ketones with NaBH₄ or LiAlH₄?

Ethanol

1-Propanol

2-Methyl-2-Propanol

2-Propanol

52. Silver mirror test in used for identification of

Aldehyde

Ester

Amines

Alcohols

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Mustansar KhanLast Updated: April 19, 2025

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ECAT Chemistry Aldehydes and Ketones Test Online

Chemistry Aldehydes and Ketones MCQS Online Test

ECAT Chemistry Aldehydes and Ketones Chapter Online Test

ECAT Chemistry Aldehydes and Ketones Test

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Chemistry Aldehydes and Ketones MCQS Online Test

ECAT Chemistry Aldehydes and Ketones Chapter Online Test

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