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

It is an elimination reaction

It is acid catalyzed reaction

It is base catalyzed reaction

It is an addition reaction

2. Benzene can be obtained from phenol by reaction with

Acetyl chloride

HNO₃

H₂

3. Point out the use of formaldehyde among the following

For manufacturing of dyes

All above

40% aqueous solution (Formaline) as

For manufacturing of resins

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

Acetone

Butanone

Acetaldehyde

3 – Pentanone

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

Propene

Propanol

All

Propane

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

Methanol

Acetone

Benzylaldehyde

Acetaldehyde

7. Ethers can act as

Bases

They are just ethers

Salts

Acids

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

Acetone

Ethyl alcohol

Methyl alcohol

Ethyl alcohol as well as acetone

9. The word ‘al’ is used for

Aldehyde

Ketone

Alcohol

Alkane

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

Wurtz reaction

Friedel Craft reaction

Cannizzaro reaction

Claisen reaction

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

2-Methyl-2-Propanol

1-Propanol

2-Propanol

Ethanol

12. Ketones are prepared by the oxidation of

Secondary alcohol

Primary alcohol

None of these

Tertiary alcohol

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

Ether

Alcohol

Aldehyde

Ketone

14. Which reaction is used to identify carbonyl compounds?

Reaction with hydroxylamine

Hydrazine

2, 4 dinitrophenyl hydrazine

With phenyl hydrazine

15. In aldol condensation the reacting molecules are

Same

None of these

Different

May or may no

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

Silver mirror

HCHO

Silver acetate

CH₃OH

17. We can distinguish between ethanol and propanal by

Sod nitroprusside

I₂ in NaoH

All react with both

Tollen’s reagent

18. Aldehydes are produce in atmosphere by

Oxidation of secondary alcohols

Reduction of alkenes

Reaction of oxygen atoms with ozone

Reaction of oxygen atoms with hydrocarbons

19. Which one can give aldol condensation reaction?

2-2 dimethyl propanal

Acetone

Benzaldehyde

Formaldehyde

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

Alkenes

Alkanes

Alkanols

Alkanals

21. 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

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

Acetone

Ethenel

Acetophenone

Ethanol

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

All aldehydes

All ketones

Aldehydes and ketones with β – hydrogen

Aldehydes with α – hydrogen

24. Tollen’s reagent is

Ammonical silver bromide

Ammonical silver nitrate

Ammonical cuprous oxide

Ammonical cuprous chloride

25. Aldehydes are oxidized to

Ketones

Carboxylic acids

Salts of carboxylic acids

Alcohols

Page 2 of 3

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

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

Methanol

2 – Hexanone

Ethanol

Propanal

28. Methanol in the presence of 50% NaOH gives

Salt and water

An aldol

An alcohol and acid

Iodoform

29. Aldehydes can be distinguished from ketones by using

Resorcinol

Conc. H₂SO₄

Schiff’s reagent

Anhy, ZnCl₂

30. Cannizzaro reaction is not given by

Formaldehyde

Acetaldehyde

Trimethyl acetaldehyde

Benzaldehyde

31. Ketones are reduced to

Carboxylic acids

3° – alcohols

1° – alcohols

2° – alcohols

32. Formalin is _________ solution of formaldehyde in water

10%

40%

20%

60%

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

Benedict’s reagent

Tollens’ reagent

Fehling reagent

Grignard’s reagent

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

Acetaldehyde

Formaldehyde

Acetone

None

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

Reaction with phenyl hydrazine

Reaction with hydrazine

Reaction with hydroxylamine

All

36. Silver mirror test in used for identification of

Ester

Aldehyde

Alcohols

Amines

37. At room temperature formaldehyde is

Liquid

Gas

Solid

None of these

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

Propylene

Acetone

Propane

Acetaldehyde

39. We can separate the carbonyl compounds from alcohols by

By addition of sodium bisulphate

Condensation reactions

Oxidation

Reduction

40. When butanone is oxidized the product is

Acetic acid

Both formic and acetic acid

None of these

Formic acid

41. Acetaldehyde is prepare from ethene by

Hydration

Air oxidation

Reduction

Hydrogenation then oxidation

42. Which is not true about halo form reaction

It is used to distinguish between athanol from other primary alcohols

It is used to distinguish aldehyde and ketone

It is used to distinguish Ethan from methanol

It is used to distinguish acetaldehyde from other aldehydel

43. A nucleophilic reagent will readily Attack

Ethanol

Ethylamine

Ethylene

44. Calcium acetate when dry distilled gives

Acetic anhydride

Acetone

Acetaldehyde

Formaldehyde

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

3-Pentanone

Proparonon

Acetone

2-Pentanone

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

Acetone

Benzaldehyde

Methyl chloride

Formaldehyde

47. Ketones are prepare by the oxidation of

None of these

Primary alcohols

2° – alcohols

3° – alcohols

48. The carbonyl group has a carbon which is

SP – hybridized

None of these

SP² – hybridized

SP³ hybridized

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

Treatment with HCN followed by oxidation

Reaction with HCN followed by reaction

Oxidation of acetaldehyde followed by basic hydrolysis

Reaction with HCN followed by acid hydrolysis

50. Silver mirror test is used for

Aldehydes

Alcohols

Acids

Esters

Page 3 of 3

51. Isopropyl alcohol on oxidation forms

Acetaldehyde

Ethylene

Acetone

Ether

52. Methyl ketones can be characterized by

Silver mirror test

Oxidation

Sod nitroprusside test

Iodoform test

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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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