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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

Page 1 of 3

1. Aldehydes can be distinguished from ketones by using

Schiff’s reagent

Resorcinol

Anhy, ZnCl₂

Conc. H₂SO₄

2. Cannizzaro reaction is not given by

Acetaldehyde

Formaldehyde

Trimethyl acetaldehyde

Benzaldehyde

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

All ketones

Aldehydes and ketones with β – hydrogen

All aldehydes

Aldehydes with α – hydrogen

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

Benedict’s reagent

Grignard’s reagent

Fehling reagent

Tollens’ reagent

5. Acetaldehyde is prepare from ethene by

Hydrogenation then oxidation

Air oxidation

Reduction

Hydration

6. Aldehydes are oxidized to

Ketones

Carboxylic acids

Alcohols

Salts of carboxylic acids

7. Methanol in the presence of 50% NaOH gives

Iodoform

An aldol

Salt and water

An alcohol and acid

8. In aldol condensation the reacting molecules are

Same

Different

May or may no

None of these

9. Ketones are reduced to

2° – alcohols

3° – alcohols

1° – alcohols

Carboxylic acids

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

Benzaldehyde

Acetone

Methyl chloride

Formaldehyde

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

CH₃OH

HCHO

Silver acetate

Silver mirror

12. We can separate the carbonyl compounds from alcohols by

Reduction

By addition of sodium bisulphate

Condensation reactions

Oxidation

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

Acetone

2-Pentanone

Proparonon

3-Pentanone

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

All

Propane

Propanol

Propene

15. We can distinguish between ethanol and propanal by

Sod nitroprusside

All react with both

Tollen’s reagent

I₂ in NaoH

16. Ketones are prepare by the oxidation of

2° – alcohols

3° – alcohols

None of these

Primary alcohols

17. Calcium acetate when dry distilled gives

Acetone

Acetaldehyde

Acetic anhydride

Formaldehyde

18. Isopropyl alcohol on oxidation forms

Acetaldehyde

Ether

Acetone

Ethylene

19. Ethers can act as

Bases

They are just ethers

Acids

Salts

20. Silver mirror test in used for identification of

Aldehyde

Alcohols

Ester

Amines

21. Benzene can be obtained from phenol by reaction with

Acetyl chloride

HNO₃

H₂

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

Reaction with hydrazine

All

Reaction with phenyl hydrazine

Reaction with hydroxylamine

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

It is acid catalyzed reaction

It is base catalyzed reaction

It is an elimination reaction

It is an addition reaction

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

Benzylaldehyde

Methanol

Acetone

Acetaldehyde

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

Acetaldehyde

Propylene

Propane

Acetone

Page 2 of 3

26. The carbonyl group has a carbon which is

SP² – hybridized

SP³ hybridized

SP – hybridized

None of these

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

Ethanol

2-Propanol

1-Propanol

2-Methyl-2-Propanol

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

Alkanes

Alkanals

Alkenes

Alkanols

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

Formaldehyde

None

Acetone

Acetaldehyde

30. Tollen’s reagent is

Ammonical silver bromide

Ammonical silver nitrate

Ammonical cuprous oxide

Ammonical cuprous chloride

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

Ether

Ketone

Alcohol

Aldehyde

32. 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

Claisen reaction

Cannizzaro reaction

33. Methyl ketones can be characterized by

Sod nitroprusside test

Oxidation

Iodoform test

Silver mirror test

34. Point out the use of formaldehyde among the following

For manufacturing of dyes

40% aqueous solution (Formaline) as

All above

For manufacturing of resins

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

3 – Pentanone

Acetone

Butanone

Acetaldehyde

36. Which one can give aldol condensation reaction?

Formaldehyde

Benzaldehyde

Acetone

2-2 dimethyl propanal

37. Formalin is _________ solution of formaldehyde in water

60%

20%

10%

40%

38. A nucleophilic reagent will readily Attack

Ethanol

Ethylamine

Ethylene

Ethanol

39. 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

40. Which reaction is used to identify carbonyl compounds?

2, 4 dinitrophenyl hydrazine

With phenyl hydrazine

Hydrazine

Reaction with hydroxylamine

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

Acetone

Ethyl alcohol

Ethyl alcohol as well as acetone

Methyl alcohol

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

Propanal

Methanol

2 – Hexanone

Ethanol

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

Acetophenone

Ethenel

Acetone

Ethanol

44. When butanone is oxidized the product is

None of these

Both formic and acetic acid

Acetic acid

Formic acid

45. The word ‘al’ is used for

Alcohol

Aldehyde

Alkane

Ketone

46. At room temperature formaldehyde is

Gas

None of these

Solid

Liquid

47. Ketones are prepared by the oxidation of

Primary alcohol

None of these

Secondary alcohol

Tertiary alcohol

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

It decrease the electrophile character carbon of carbonyl group

Increased the nucleophile character of reagent

It increase the electrophile character of carbon of carboxyl group

All are possible

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

Oxidation of acetaldehyde followed by basic hydrolysis

Reaction with HCN followed by reaction

Treatment with HCN followed by oxidation

Reaction with HCN followed by acid hydrolysis

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

Page 3 of 3

51. Silver mirror test is used for

Aldehydes

Acids

Esters

Alcohols

52. Aldehydes are produce in atmosphere by

Reaction of oxygen atoms with hydrocarbons

Reduction of alkenes

Reaction of oxygen atoms with ozone

Oxidation of secondary 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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