XII Chemistry Aldehyde and Ketone Online Test Mdcat-2024

Instructions for Aldehyde and Ketone Online Test Mdcat-2024:

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NameEmailPhone Number

1 / 50

1. When propanone react with hydroxyl amine_______ is formed ?

a) Acetone hydrozone

b) acetaldehyde cyanohydrin

c) all

d) none

2 / 50

2. Hydration of Alkyne gives_________

a) Alcohol

b) Carboxylic acid

c) Aldehyde

d) None of these

3 / 50

3. for ozonolysis of Alkene which reducing agent is Used?

a) KMnO4

b) K2Cr2O7

c) Zn

d) V205

4 / 50

4. Ozonolysis of 2,3-dimethyl butene gives 2 molecules Of______

a) acetaldehyde

b) Acetone

c) formaldehyde

d) All of these are possible

5 / 50

5. C₂H₂0₃ is formula of:

a) Maleic acid

b) Ozonide

c) Glucose

d) both b and c

6 / 50

6. The carbon atom in Carbonyl group is_______ hybridized.

a) Sp3

b) Sp2

c) Sp

d) both a and b

7 / 50

7. Glucose has _______ functional group.

a) Aldehyde

b) ketones

c) Both

d) none

8 / 50

8. Aldehyde and ketone are Soluble in:

a) H₂O

b) Ether

c) Alkane

d) All of these

9 / 50

9. Correct Order of boiling points:

a) carbonyl compound > carboxylic acid > ester > alcohol

b) alkane > alcohol > carboxylic acid > carbonyl compound

c) carboxylic acid >alkane > Alcohol > carbonyl compound

d) None of these.

10 / 50

10. Which of following is used in preparation of iodoform, chloroform & nail polish Remover:

a) Aldehyde

b) Acetaldehyde

c) Acetone

d) None

11 / 50

11. Which of the following is formed when excess of ethyl alcohol is treated with conc. H2SO4 at a low temperature?

a) Diethyl ether

b) Dimethyl ether

c) Ethene

d) Acetylene

12 / 50

12. Conversion of ethyl alcohol to Acetaldehyde can be carried out by?

a) Polymerization

b) Dehydration

c) Reduction

d) Oxidation

13 / 50

13. Which of the following is formed when acetone is oxidized

a) Formic Acid

b) Acetic Acid

c) Propionic Acid

d) Butyric Acid

14 / 50

14. Aldehyde reacts with

a) Only mild oxidizing agents

b) Only strong oxidizing agents

c) Mild and strong oxidizing agents

d) it is always difficult to oxidize aldehyde

15 / 50

15. Acetophenone is

a) Alcohol

b) Phenol

c) Aliphatic Ketone

d) Aromatic Ketone

16 / 50

16. Alkoxide is obtained by treating

a) Alcohol with Na metal

b) Alcohol with Carboxylic acid

c) Ether with HI

d) None

17 / 50

17. When grignard reagent reacts with ketone it gives:

a) Primary alcohol

b) Secondary alcohol

c) Tertiary alcohol

d) Ethanol

18 / 50

18. Carbonyl and non carbonyl compounds are identified by the reagent

a) I₂/NaOH

b) NaHSO₃

c) HCN

d) None of these

19 / 50

19. Reaction of aldehyde and hydroxyl amine gives a product which is called

a) Amino Hydroxides

b) Hydrazone

c) Oxime

d) Primary Amine

20 / 50

20. Which do not give brick red ppt with Fehling's solution

a) Formaldehyde

b) Acetaldehyde

c) Acetone

d) All of these

21 / 50

21. Which compound is soluble in water

a) HCHO

b) CH₃CHO

c) CH₃COCH₃

d) All of these

22 / 50

22. Identify the organic compound which on heating with strong solution of NaOH partly converted into salt of carboxylic acid and partly into alcohol

a) Acetone

b) Acetaldehyde

c) Formaldehyde

d) All of these

23 / 50

23. Which of the following reactions is a method for conversion of ketone into hydrocarbon

a) Aldol condensation

b) Cannizzaro’s reaction

c) Reimer Tiemann reaction

d) Wolf Kishner reaction

24 / 50

24. Aldol condensation will not take place in:

a) HCHO

b) CH₃CHO

c) CH₃COCH₃

d) None of these

25 / 50

25. Clemmensen reduction of a aldehyde is carried out in the presence of which of the following.

a) H₂ and Pt catalyst

b) Glycol and KOH

c) Zn-Hg/HCl conc.

d) LiAlH₄

26 / 50

26. Which of the following reagent is used to reduce an aldehyde to primary alcohol?

a) N₂H/KOH

b) Zn/Hg and conc.HCl

c) LiAlH₄

d) All of these

27 / 50

27. Dry heating of calcium acetate gives :

a) Acetaldehyde

b) Ethane

c) Acetone

d) Formaldehyde

28 / 50

28. Hydrolysis of ozonide of 1-Butene gives :

a) Acetaldehyde and formaldehyde

b) Propionaldehyde and formaldehyde

c) Acetaldehyde only

d) Acetaldehyde and Oxalic Acid

29 / 50

29. Ketones are produced by:

a) Hydrolysis of ester

b) Oxidation of primary alcohol

c) Oxidation of secondary alcohol

d) None

30 / 50

30. Which of the following type of isomerism is shown by pentanone :

a) Chain isomerism

b) Position Isomerism

c) Functional isomerism

d) AOT

31 / 50

31. Fehling solution "A" and Fehling solution "B" are :

a) CuSO₄ solution and NH₄OH

b) CuSO₄ solution and alkaline solution of sodium potassium tartarate

c) CuSO₄ solution and alkaline solution of sodium citrate

d) CuSO₄ solution and NaOH

32 / 50

32. Which of the aldehyde is most reactive

a) C₆H₅-CHO

b) CH₃CHO

c) HCHO

d) All of these

33 / 50

33. When aliphatic aldehyde is treated with Fehling's solution, a brick-red precipitate of is formed

a) Copper (I) oxide

b) Copper (II) hydroxide

c) Copper (II) oxide

d) Copper (I) hydroxide

34 / 50

34. Which pair is incorrectly matched?

a) Iso-propyl alcohol, Secondary alcohol

b) Iso-Butyl alcohol, Secondary alcohol

c) Propanol, Primary alcohol

d) Neopentyl alcohol, primary alcohol

35 / 50

35. Oxidation of butan-2-one with K₂Cr₂O, and conc.H produces:

a) Two carboxylic acids

b) Only one carboxylic acid

c) Carboxylic acid and aldehyde

d) Carboxylic acid and ester

36 / 50

36. Under Wolf-Kishner conditions which conversion can occur

a) Acetone into propanal

b) Acetaldehyde into acetic acid

c) Acetaldehyde into ethanol

d) Acetone into propane

37 / 50

37. Hydration of alkynes except ethyne in presence of H₂SO₄ HgSO₄gives:

a) Aldehyde

b) Ketone

c) Carboxylic acid

d) Alcohol

38 / 50

38. Formalin is a ______aqueous solution of formaldehyde.

a) 20%

b) 25%

c) 40%

d) 52%

39 / 50

39. Aldehydes and ketones are reactive compounds due to

a) Electrophilic carbonyl carbon

b) Polar carbonyl group

c) Nucleophilic carbonyl carbon

d) Both A and B

40 / 50

40. When an aldehyde is heated with Fehling's solution, it forms:

a) Red ppt of cupric oxide

b) Silver mirror

c) Yellow ppt of iodoform

d) Red ppt of cuprous oxide

41 / 50

41. Aldehyde and ketone can be differentiated by:

a) Fehling's test

b) Sodium bisulphite test

c) Iodoform test

d) . All of these

42 / 50

42. When formaldehyde is heated with NaOH it results in formation of:

a) Aldol

b) Iodoform

c) Carboxylic acid

d) Methyl alcohol and sodium form

43 / 50

43. Acetone and acetaldehyde can't be differentiated by:

a) Fehling's test

b) Tollen's test

c) Iodoform test

d) Benedicts' test

44 / 50

44. Fehling's test is negative for:

a) Glucose

b) ketones

c) Formaldehyde

d) None

45 / 50

45. Hybrid state of C and O in carbonyl group (-CO-) is:

a) sp², sp³

b) sp², sp²

c) sp³, sp²

d) sp³, sp³

46 / 50

46. Which of the following statement is incorrect?

a) Aldehydes are more reactive than ketones.

b) Aldehydes have higher boiling point than ketones

c) Lower aldehydes and ketones are soluble in water due to hydrogen bonding

d) None of these

47 / 50

47. Acetone (CH₃COCH₃) is less reactive than acetaldehyde (CH₃CHO) due to:

a) Steric repulsion caused by two methyl groups AB

b) Two methyl groups increase electrophilicity of carbonyl group

c) Presence of six O-H atoms

d) Both A and B

48 / 50

48. Fehling's solution is a mild oxidizing agent hence it can oxidize:

a) Aliphatic aldehydes only

b) Aliphatic as well as aromatic aldehydes

c) Aromatic aldehydes only

d) Aldehydes and ketones

49 / 50

49. Acetaldehyde when heated with sodium hydroxide and iodine yellow coloured precipitates are formed of:

a) CH₃I

b) CHI₃

c) CH₂I₂

d) Cl₄

50 / 50

50. Tollen's reagent is:

a) Aqueous solution of AgNO₃

b) Alkaline solution of AgNO₃

c) Ammonical solution of AgNO₃

d) Acidic solution of AgNO₃

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Instructions for Aldehyde and Ketone Online Test Mdcat-2024:

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