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

Silver acetate

CH₃OH

HCHO

Silver mirror

2. 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

All are possible

It increase the electrophile character of carbon of carboxyl group

3. Aldehydes are oxidized to

Alcohols

Carboxylic acids

Salts of carboxylic acids

Ketones

4. Acetaldehyde is prepare from ethene by

Air oxidation

Reduction

Hydration

Hydrogenation then oxidation

5. Which reaction is used to identify carbonyl compounds?

Hydrazine

2, 4 dinitrophenyl hydrazine

Reaction with hydroxylamine

With phenyl hydrazine

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

Propylene

Acetaldehyde

Acetone

Propane

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

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

Acetone

Acetophenone

Ethenel

Ethanol

9. Ketones are reduced to

Carboxylic acids

1° – alcohols

2° – alcohols

3° – alcohols

10. The word ‘al’ is used for

Alcohol

Aldehyde

Alkane

Ketone

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

2-Methyl-2-Propanol

2-Propanol

Ethanol

1-Propanol

12. Tollen’s reagent is

Ammonical cuprous oxide

Ammonical silver nitrate

Ammonical cuprous chloride

Ammonical silver bromide

13. We can distinguish between ethanol and propanal by

Tollen’s reagent

All react with both

Sod nitroprusside

I₂ in NaoH

14. Which is not true about halo form reaction

It is used to distinguish aldehyde and ketone

It is used to distinguish acetaldehyde from other aldehydel

It is used to distinguish between athanol from other primary alcohols

It is used to distinguish Ethan from methanol

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

Ether

Alcohol

Ketone

Aldehyde

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

Acetaldehyde

Acetone

Formaldehyde

None

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

Acetone

Ethyl alcohol as well as acetone

Ethyl alcohol

Methyl alcohol

18. The carbonyl group has a carbon which is

None of these

SP² – hybridized

SP³ hybridized

SP – hybridized

19. When butanone is oxidized the product is

Acetic acid

Formic acid

Both formic and acetic acid

None of these

20. A nucleophilic reagent will readily Attack

Ethylamine

Ethylene

Ethanol

21. Which one can give aldol condensation reaction?

Formaldehyde

Acetone

2-2 dimethyl propanal

Benzaldehyde

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

Methanol

Acetaldehyde

Acetone

Benzylaldehyde

23. Formalin is _________ solution of formaldehyde in water

40%

60%

10%

20%

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

Propene

Propane

All

Propanol

25. Point out the use of formaldehyde among the following

For manufacturing of resins

40% aqueous solution (Formaline) as

For manufacturing of dyes

All above

Page 2 of 3

26. At room temperature formaldehyde is

Gas

None of these

Solid

Liquid

27. Silver mirror test in used for identification of

Ester

Amines

Alcohols

Aldehyde

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

Alkanes

Alkanals

Alkenes

Alkanols

29. Silver mirror test is used for

Aldehydes

Alcohols

Esters

Acids

30. Cannizzaro reaction is not given by

Formaldehyde

Acetaldehyde

Benzaldehyde

Trimethyl acetaldehyde

31. In aldol condensation the reacting molecules are

Same

None of these

May or may no

Different

32. Aldehydes are produce in atmosphere by

Reaction of oxygen atoms with hydrocarbons

Reduction of alkenes

Oxidation of secondary alcohols

Reaction of oxygen atoms with ozone

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

Reaction with hydroxylamine

Reaction with phenyl hydrazine

Reaction with hydrazine

All

34. Ketones are prepared by the oxidation of

Secondary alcohol

Tertiary alcohol

None of these

Primary alcohol

35. Benzene can be obtained from phenol by reaction with

Acetyl chloride

H₂

HNO₃

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

3-Pentanone

Acetone

Proparonon

2-Pentanone

37. Methyl ketones can be characterized by

Iodoform test

Sod nitroprusside test

Silver mirror test

Oxidation

38. Aldehydes can be distinguished from ketones by using

Schiff’s reagent

Anhy, ZnCl₂

Resorcinol

Conc. H₂SO₄

39. Calcium acetate when dry distilled gives

Acetone

Acetic anhydride

Formaldehyde

Acetaldehyde

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

Benzaldehyde

Methyl chloride

Acetone

Formaldehyde

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

All ketones

Aldehydes with α – hydrogen

All aldehydes

Aldehydes and ketones with β – hydrogen

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

Reaction with HCN followed by reaction

Oxidation of acetaldehyde followed by basic hydrolysis

Treatment with HCN followed by oxidation

Reaction with HCN followed by acid hydrolysis

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

Cannizzaro reaction

Claisen reaction

Wurtz reaction

Friedel Craft reaction

44. Methanol in the presence of 50% NaOH gives

An aldol

Iodoform

Salt and water

An alcohol and acid

45. Isopropyl alcohol on oxidation forms

Ether

Ethylene

Acetone

Acetaldehyde

46. Ketones are prepare by the oxidation of

None of these

3° – alcohols

Primary alcohols

2° – alcohols

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

Benedict’s reagent

Grignard’s reagent

Tollens’ reagent

Fehling reagent

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

It is an addition reaction

It is base catalyzed reaction

It is an elimination reaction

It is acid catalyzed reaction

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

Ethanol

Propanal

Methanol

2 – Hexanone

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

3 – Pentanone

Acetaldehyde

Butanone

Acetone

Page 3 of 3

51. Ethers can act as

Salts

They are just ethers

Acids

Bases

52. We can separate the carbonyl compounds from alcohols by

By addition of sodium bisulphate

Reduction

Oxidation

Condensation reactions

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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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