MDCAT XII Chemistry Aldehyde & ketone +Carboxylic Acid Online Test-2

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Test Details:

Subject: Chemistry
Class: 2nd year or 12
Chapter Name: Aldehyde & ketone + Carboxylic acid
Test: MDCAT 2025
Book: Sindh Textbook
Total No. Of MCQS: 50 MCQS
Time Allowed: 50 Minutes
Price: Free

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125

Created on May 01, 2025 By

medicoengineer.com

MDCAT XII Chemistry Aldehyde & ketone + Carboxylic Acid Online Test-2

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NameEmailPhone Number

1 / 50

1. Which is the stronger base?

a) CH₃COOH

b) CH₃–CH₂–COOH

c) HCOOH

d) CH₃–CH₂–CH₂–COOH

2 / 50

2. When alcohol reacts with a carboxylic acid in the presence of H₂SO₄, the product is:

a) Ethyl ethanoate

b) Ethanamide

c) Ethane

d) Ethanoic anhydride

3 / 50

3. P₄O₁₀ acts as a:

a) Oxidizing agent

b) Reducing agent

c) Dehydrating agent

d) Base

4 / 50

4. What is the angle between the carbonyl C=O bond and the bond between the carbonyl carbon and the atom connected to it?

a) 60°

b) 90°

c) 120°

d) 135°

5 / 50

5. Find the acid-catalyzed nucleophilic addition reaction:

a) With HCN

b) With RMgX

c) With H₂O

d) None of these

6 / 50

6. Which has the lowest pKa value?

a) CH₃COOH

b) C₆H₅OH

c) C₂H₅OH

d) H₂O

7 / 50

7. When benzene is oxidized with KMnO₄, it produces:

a) Benzoic acid

b) Toluene

c) Phenol

d) None of these

8 / 50

8. The hydrocarbon derivative of carboxylic acid is:

a) Acetic anhydride

b) Ether

c) Ketone

d) None of these

9 / 50

9. Aldehyde can be identified by:

A.Tollens' reagent

B.Oxidation with KMnO₄

C. Fehling's solution

a) A, B

b) A, B, C

c) A, C

d) A only

10 / 50

10. The oxidizing agent in Clemmensen reduction is:

a) N₂H₄/KOH/ethylene glycol

b) Zn-Hg/HCl (conc.)

c) Zn/HCl

d) None of these

11 / 50

11. The pKa value of formic acid is:

a) 5

b) 4

c) 6

d) 7

12 / 50

12. C₄H₆O₅ is the formula of:

a) Maleic acid

b) Tartaric acid

c) Acetic acid

d) None of these

13 / 50

13. Which of the following is used as an animal feed additive and prevents mold growth?

a) Acetic acid

b) Propionic acid

c) Formic acid

d) Butyric acid

14 / 50

14. Which of the following tests is not given by aldehydes?

a) 2,4-DNPH

b) Tollens' test

c) . Sodium nitroprusside test

d) . NaHSO₃

15 / 50

15. When we use NaBH₄ to convert carboxylic acid, it forms:

a) Alkane

b) Alcohol

c) Aldehyde

d) None of these

16 / 50

16. Aslam was good at chemistry. He accidentally performed some new reactions to produce new products. If he added some HCl to carboxylic acid, the product would be:

a) Acid halide

b) Alkyl halide

c) Acetic anhydride

d) None of these

17 / 50

17. Saba has a small amount of isopropyl alcohol and 100 moles of H₂SO₄ and KMnO₄. What might be the product?

a) Propanone

b) Propanoic acid

c) Formic and acetic acid

d) Reaction will stop at the initial point

18 / 50

18. If someone is losing their beauty due to excessive radiation during summer, what type of acid might a dermatologist recommend?

a) HOC₅H₆COOH

b) HOC₆H₄COOH

c) HOC₅H₄COOH

d) HOC₆H₅COOH

19 / 50

19. . Aldehyde combines with ethanol in the presence of HCl to produce:

a) Alkane

b) Acetal

c) . Carboxylic acid

d) . Ketone

20 / 50

20. The color of formic acid is:

a) Red-brown

b) Yellow-brown

c) Light brown

d) Colourless

21 / 50

21. If I drop some acetic acid into benzene, the mass of acetic acid will be:

a) 60 amu

b) 90 amu

c) 120 amu

d) 180 amu

22 / 50

22. Total number of sp³ hybridized carbon atoms in caproic acid:

a) 5

b) 6

c) 4

d) 3

23 / 50

23. Cannizzaro’s reaction is not given by:

a) Formaldehyde

b) Trichloroacetaldehyde

c) . Benzaldehyde

d) . Acetaldehyde

24 / 50

24. Which of the following is a Greek derivative?

a) Formic acid

b) Propionic acid

c) Butyric acid

d) Caproic acid

25 / 50

25. The formula of an anhydride is:

a) RCO₂O

b) RCO₂R

c) (RCO)₂O₂

d) (RCO)₂O

26 / 50

26. Acetic acid is found in:

a) Ants

b) Vinegar

c) Goat

d) Butter

27 / 50

27. Alkane nitrile can be produced by _______ hydrolysis of RCOOH:

a) Base

b) Acid

c) Neutral

d) None

28 / 50

28. . When aldehyde reacts with Tollens’ reagent:

a) . Ketone is produced

b) Silver is oxidized

c) . Alcohol is produced

d) None of these

29 / 50

29. Formalin contains what percentage of substances other than formaldehyde?

a) 37 to 40%

b) 37 to 40%

c) 50 to 60%

d) 63 to 60%

30 / 50

30. PCC is an:

a) Oxidizing agent

b) Activating agent

c) Reducing agent

d) Catalyst

31 / 50

31. . Which of the following is used as an ink preservative?

a) . Alcohol

b) Ether

c) Ester

d) . Phenol

32 / 50

32. Akhtar smells a propane bottle. What type of gesture does he display?

a) Nervous

b) Relaxed

c) Smiling

d) No effect on his gesture

33 / 50

33. Reactions given by aldehydes include:

a) Reduction

b) Polymerization

c) Oxidation

d) All of these

e) All except B

34 / 50

34. . Which of the following is most reactive?

a) Formaldehyde

b) Acetaldehyde

c) . Benzaldehyde

d) Propanone

35 / 50

35. When NH₂OH reacts with an aldehyde or ketone, it produces:

a) Cyanohydrin

b) Oxime

c) Alkane

d) No reaction

36 / 50

36. If a ketone is mixed with Fehling's solution, the color of the solution is:

a) Red

b) Blue

c) Yellow

d) Reddish-brown

37 / 50

37. Identify the mixed ketone:

a) Acetone

b) Diethyl ketone

c) . Benzophenone

d) . Acetophenone

38 / 50

38. Find the acid-catalyzed nucleophilic addition reaction:

a) With HCN

b) With RMgX

c) With H₂O

d) None Of these

39 / 50

39. . By the oxidation of ketone with chromic acid, _______ is produced:

a) . Carboxylic acid

b) Secondary alcohol

c) . Alkane

d) None of these

40 / 50

40. Hydrolysis of nitrile produces:

a) Carbolic acid

b) Ester

c) RCOOH

d) None of these

41 / 50

41. The formula of citric acid is:

a) C₆H₈O₇

b) C₆H₈O₆

c) C₆H₇O₈

d) C₆H₈O₈

42 / 50

42. The general formula of carboxylic acid is:

a) CnH₂nO

b) CnH₂n

c) . CnH₂nO₂

d) . CnH₂n+₂O

43 / 50

43. Find the functions of methanal:

Preservation of biological specimens
Direct preparation of acetic acid
Silvering of mirrors
Manufacturing of Bakelite

a) 1, 2, 3, 4

b) 2, 3, 4

c) 1, 3, 4

d) 3, 4

44 / 50

44. Which of the following is the least reactive?

a) Acetaldehyde

b) Di-tert-butyl ketone

c) Di-isopropyl ketone

d) Butanone

45 / 50

45. . Identify the compound: CH₃–CH=CH–CHO

a) But-2-enal

b) Ethane

c) . But-2-ene

d) Buten-2-al

46 / 50

46. When aldehyde and Fehling’s solution mix, they form Cu₂O. The color of cuprous oxide is:

a) Red

b) Brown

c) Reddish-brown solution

d) None of these

47 / 50

47. In base-catalyzed reactions of carbonyl compounds, the base:

a) Increases the nucleophilic character of the reagent

b) Increases the electrophilic character of the carbonyl compound

c) Increases the acidic character of the reagent

d) Both A and B

48 / 50

48. Which of the following substances is the least water-soluble?

a) Methanal

b) Pentanal

c) Propanone

d) Ethanal

49 / 50

49. The general formula of aldehyde is:

a) . CnH₂nO₂n

b) . CnH₂n

c) . CnH₂nO

d) CnH₂nOₙ₊₁

50 / 50

50. Which of the following has the most pleasant smell?

a) Formic acid

b) Acetic acid

c) Propanoic acid

d) Butyric acid

Your score is

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