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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. Ethers can act as

Salts

Bases

They are just ethers

Acids

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

Aldehydes and ketones with β – hydrogen

Aldehydes with α – hydrogen

All ketones

All aldehydes

3. Benzene can be obtained from phenol by reaction with

HNO₃

H₂

Acetyl chloride

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

Alkenes

Alkanals

Alkanes

Alkanols

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

CH₃OH

HCHO

Silver acetate

Silver mirror

6. 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

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

Acetone

Benzaldehyde

Methyl chloride

Formaldehyde

8. Methyl ketones can be characterized by

Silver mirror test

Iodoform test

Sod nitroprusside test

Oxidation

9. Which one can give aldol condensation reaction?

Formaldehyde

Benzaldehyde

2-2 dimethyl propanal

Acetone

10. Ketones are reduced to

1° – alcohols

Carboxylic acids

3° – alcohols

2° – alcohols

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

Alcohol

Ether

Ketone

Aldehyde

12. Silver mirror test in used for identification of

Amines

Ester

Aldehyde

Alcohols

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

Ethyl alcohol

Acetone

Methyl alcohol

Ethyl alcohol as well as acetone

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

Increased the nucleophile character of reagent

It decrease the electrophile character carbon of carbonyl group

It increase the electrophile character of carbon of carboxyl group

All are possible

15. Cannizzaro reaction is not given by

Formaldehyde

Acetaldehyde

Benzaldehyde

Trimethyl acetaldehyde

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

Acetone

Acetaldehyde

3 – Pentanone

Butanone

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

Acetone

Propylene

Acetaldehyde

Propane

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

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

Treatment with HCN followed by oxidation

Oxidation of acetaldehyde followed by basic hydrolysis

Reaction with HCN followed by acid hydrolysis

Reaction with HCN followed by reaction

20. The word ‘al’ is used for

Alcohol

Alkane

Ketone

Aldehyde

21. Which reaction is used to identify carbonyl compounds?

Hydrazine

Reaction with hydroxylamine

2, 4 dinitrophenyl hydrazine

With phenyl hydrazine

22. We can distinguish between ethanol and propanal by

I₂ in NaoH

All react with both

Tollen’s reagent

Sod nitroprusside

23. Isopropyl alcohol on oxidation forms

Acetaldehyde

Ethylene

Ether

Acetone

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

All

Propanol

Propene

Propane

25. Ketones are prepared by the oxidation of

Secondary alcohol

Tertiary alcohol

None of these

Primary alcohol

Page 2 of 3

26. The carbonyl group has a carbon which is

SP – hybridized

SP² – hybridized

SP³ hybridized

None of these

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

1-Propanol

2-Methyl-2-Propanol

Ethanol

2-Propanol

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

2-Pentanone

Acetone

Proparonon

3-Pentanone

29. Which is not true about halo form reaction

It is used to distinguish between athanol from other primary alcohols

It is used to distinguish acetaldehyde from other aldehydel

It is used to distinguish aldehyde and ketone

It is used to distinguish Ethan from methanol

30. Calcium acetate when dry distilled gives

Formaldehyde

Acetic anhydride

Acetone

Acetaldehyde

31. We can separate the carbonyl compounds from alcohols by

Reduction

Condensation reactions

Oxidation

By addition of sodium bisulphate

32. Tollen’s reagent is

Ammonical silver bromide

Ammonical cuprous oxide

Ammonical silver nitrate

Ammonical cuprous chloride

33. Methanol in the presence of 50% NaOH gives

An alcohol and acid

An aldol

Salt and water

Iodoform

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

Grignard’s reagent

Benedict’s reagent

Tollens’ reagent

Fehling reagent

35. Aldehydes are oxidized to

Ketones

Salts of carboxylic acids

Alcohols

Carboxylic acids

36. Point out the use of formaldehyde among the following

All above

For manufacturing of dyes

For manufacturing of resins

40% aqueous solution (Formaline) as

37. Silver mirror test is used for

Acids

Aldehydes

Esters

Alcohols

38. A nucleophilic reagent will readily Attack

Ethanol

Ethylene

Ethanol

Ethylamine

39. At room temperature formaldehyde is

Solid

Liquid

None of these

Gas

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

It is an addition reaction

It is acid catalyzed reaction

It is base catalyzed reaction

It is an elimination reaction

41. Acetaldehyde is prepare from ethene by

Reduction

Hydrogenation then oxidation

Air oxidation

Hydration

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

Ethanol

Acetophenone

Ethenel

Acetone

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

None

Acetone

Formaldehyde

Acetaldehyde

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

Reaction with phenyl hydrazine

Reaction with hydrazine

All

Reaction with hydroxylamine

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

Claisen reaction

Wurtz reaction

Cannizzaro reaction

Friedel Craft reaction

46. When butanone is oxidized the product is

Formic acid

Both formic and acetic acid

Acetic acid

None of these

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

Methanol

2 – Hexanone

Ethanol

Propanal

48. Formalin is _________ solution of formaldehyde in water

10%

40%

60%

20%

49. In aldol condensation the reacting molecules are

None of these

May or may no

Same

Different

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

Acetaldehyde

Methanol

Acetone

Benzylaldehyde

Page 3 of 3

51. Aldehydes can be distinguished from ketones by using

Resorcinol

Anhy, ZnCl₂

Conc. H₂SO₄

Schiff’s reagent

52. Ketones are prepare by the oxidation of

2° – alcohols

None of these

Primary alcohols

3° – 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

ECAT Chemistry Aldehydes and Ketones Test

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