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

Reaction with phenyl hydrazine

Reaction with hydroxylamine

Reaction with hydrazine

All

2. Isopropyl alcohol on oxidation forms

Acetaldehyde

Ethylene

Ether

Acetone

3. Acetaldehyde is prepare from ethene by

Hydrogenation then oxidation

Hydration

Air oxidation

Reduction

4. Calcium acetate when dry distilled gives

Acetaldehyde

Acetone

Formaldehyde

Acetic anhydride

5. Ketones are prepared by the oxidation of

None of these

Tertiary alcohol

Primary alcohol

Secondary alcohol

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

Benzylaldehyde

Acetaldehyde

Acetone

Methanol

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

Alkenes

Alkanols

Alkanes

Alkanals

8. The carbonyl group has a carbon which is

None of these

SP³ hybridized

SP – hybridized

SP² – hybridized

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

2-Propanol

1-Propanol

Ethanol

2-Methyl-2-Propanol

10. The word ‘al’ is used for

Ketone

Alkane

Alcohol

Aldehyde

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

Benedict’s reagent

Grignard’s reagent

Fehling reagent

Tollens’ reagent

12. Methyl ketones can be characterized by

Silver mirror test

Sod nitroprusside test

Oxidation

Iodoform test

13. Which reaction is used to identify carbonyl compounds?

With phenyl hydrazine

Hydrazine

2, 4 dinitrophenyl hydrazine

Reaction with hydroxylamine

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

Proparonon

Acetone

3-Pentanone

2-Pentanone

15. Methanol in the presence of 50% NaOH gives

An alcohol and acid

An aldol

Iodoform

Salt and water

16. Benzene can be obtained from phenol by reaction with

HNO₃

H₂

Acetyl chloride

17. Tollen’s reagent is

Ammonical cuprous chloride

Ammonical silver bromide

Ammonical cuprous oxide

Ammonical silver nitrate

18. When butanone is oxidized the product is

Both formic and acetic acid

None of these

Formic acid

Acetic acid

19. In aldol condensation the reacting molecules are

May or may no

None of these

Same

Different

20. Ketones are prepare by the oxidation of

Primary alcohols

2° – alcohols

3° – alcohols

None of these

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

Oxidation of acetaldehyde followed by basic hydrolysis

Reaction with HCN followed by acid hydrolysis

Treatment with HCN followed by oxidation

Reaction with HCN followed by reaction

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

Acetophenone

Ethanol

Ethenel

Acetone

23. Ethers can act as

They are just ethers

Bases

Salts

Acids

24. Aldehydes can be distinguished from ketones by using

Schiff’s reagent

Anhy, ZnCl₂

Conc. H₂SO₄

Resorcinol

25. Point out the use of formaldehyde among the following

All above

For manufacturing of dyes

For manufacturing of resins

40% aqueous solution (Formaline) as

Page 2 of 3

26. Silver mirror test in used for identification of

Aldehyde

Amines

Ester

Alcohols

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

Methanol

Ethanol

Propanal

2 – Hexanone

28. Formalin is _________ solution of formaldehyde in water

10%

60%

40%

20%

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

All are possible

It increase the electrophile character of carbon of carboxyl group

It decrease the electrophile character carbon of carbonyl group

Increased the nucleophile character of reagent

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

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

None

Formaldehyde

Acetone

Acetaldehyde

32. We can separate the carbonyl compounds from alcohols by

Condensation reactions

Oxidation

Reduction

By addition of sodium bisulphate

33. Ketones are reduced to

2° – alcohols

3° – alcohols

1° – alcohols

Carboxylic acids

34. Aldehydes are oxidized to

Carboxylic acids

Alcohols

Salts of carboxylic acids

Ketones

35. 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

36. Which one can give aldol condensation reaction?

Benzaldehyde

Acetone

2-2 dimethyl propanal

Formaldehyde

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

Aldehydes with α – hydrogen

All ketones

All aldehydes

Aldehydes and ketones with β – hydrogen

38. 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 Ethan from methanol

It is used to distinguish between athanol from other primary alcohols

39. We can distinguish between ethanol and propanal by

All react with both

Tollen’s reagent

Sod nitroprusside

I₂ in NaoH

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

Acetaldehyde

Propane

Propylene

Acetone

41. 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

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

3 – Pentanone

Acetone

Acetaldehyde

Butanone

43. A nucleophilic reagent will readily Attack

Ethylene

Ethanol

Ethylamine

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

It is an addition reaction

It is an elimination reaction

It is acid catalyzed reaction

It is base catalyzed reaction

45. Aldehydes are produce in atmosphere by

Reaction of oxygen atoms with hydrocarbons

Reaction of oxygen atoms with ozone

Oxidation of secondary alcohols

Reduction of alkenes

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

Silver mirror

HCHO

CH₃OH

Silver acetate

47. Silver mirror test is used for

Esters

Acids

Aldehydes

Alcohols

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

All

Propene

Propane

Propanol

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

Ether

Ketone

Alcohol

Aldehyde

50. Cannizzaro reaction is not given by

Benzaldehyde

Trimethyl acetaldehyde

Formaldehyde

Acetaldehyde

Page 3 of 3

51. At room temperature formaldehyde is

Liquid

None of these

Gas

Solid

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

Formaldehyde

Acetone

Methyl chloride

Benzaldehyde

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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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