XII Chemistry Carboxylic Acid Online Test Mdcat-2024

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Test Details:

Subject: Chemistry
Class: 2nd year or 12
Chapter name: Carboxylic acid
Test: MDCAT 2024
Book: Sindh Textbook
Total No. Of MCQS: 50
Time Allowed: 50 Minutes

1022

Created on April 15, 2024 By

medicoengineer.com

XII Chemistry Carboxylic acid Online Test Mdcat-2024

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NameEmailPhone Number

1 / 50

1. Formula of Salicylic Acid is:

a) Acetic anhydride (C₄H₆O₃)

b) HOC₆H₄COOH

c) Tartaric Acid (C₄H₆O₆)

d) Malic Acid (C₄H₆O₅)

e) Citric Acid (C₆H₈O₇)

2 / 50

2. ------- is used as a preservative, flavor enhancer, and acidity regulator:

a) Malic Acid

b) Citric Acid

c) Butyric acid

d) Tartaric Acid

e) None

3 / 50

3. Reaction of Acid halide with alcohol in the presence of H₂SO₄ yield:

a) Carboxylic acid

b) Ester

c) Nitrile

d) Ketone

e) None

4 / 50

4. The major product of nitration of benzoic acid is:

a) 3-Nitrobenzoic acid

b) 4-Nitrobenzoic acid

c) 2-Nitrobenzoic acid

d) 2, 4-dinitrobenzoic acid

5 / 50

5. Which reagent will bring about the conversion of carboxylic acids into esters?

a) C₂H₅OH

b) Dry HCl + C₂H₅OH

c) LiAlH₄

d) Al(OC₂H₅)₃

6 / 50

6. Carboxylic acids are more acidic than phenol and alcohol because of:

a) Intermolecular hydrogen bonding

b) Formation of dimers

c) Highly acidic hydrogen

d) Resonance stabilization of their conjugate base

7 / 50

7. Dimerisation of carboxylic acids is due to:

a) Ionic bond

b) Covalent bond

c) Coordinate bondCoordinate bond

d) Intermolecular hydrogen bond

8 / 50

8. When sodium Benzoate is heated with soda lime, a hydrocarbon is obtained, what is that?

a) Methane

b) Ethane

c) Ethene

d) Ethyne

e) Benzene

9 / 50

9. The most common compound found in pineapple:

a) Octyl acetate

b) Ethyl butanoate

c) Ethyl formate

d) Octyl propanoate

10 / 50

10. Caproic acid naturally found in:

a) Bees string

b) Vinegar

c) Roots

d) Goat

11 / 50

11. The Formula of valaric acid is:

a) C₅H₁₁COOH

b) C₄H₉COOH

c) C₆H₁₃COOH

d) C₃H₇COOH

12 / 50

12. The reaction of carboxylic acid with alcohol in presence of acid catalyst produce:

a) Acid halide

b) Acid amide

c) Acid anhydride

d) Ester

13 / 50

13. Formation of acetyl chloride and ethane amide from acetic acid involved:

a) Replacement of hydrogen

b) Replacement of carboxyl group

c) Replacement of hydroxyl group

d) Replacement of oxygen

14 / 50

14. Benzoic acid is produced by the oxidation of:

a) Ethyl benzene

b) Benzene

c) Toluene

d) Both A and C

15 / 50

15. The molecules of carboxylic acid on condensation produce:

a) Ester

b) Acid amide

c) Acid halide

d) Acid anhydride

16 / 50

16. Acetic acid is stronger acid than:

a) Phenol

b) Ethyl alcohol

c) Propanoic acid

d) All of these

17 / 50

17. -------is used in the preparation of skin care products in the preparation aspirin

a) Benzoic acid

b) Salicylic acid

c) Tartaric acid

d) Malic acid

18 / 50

18. Calcium acetate on strong heating gives:

a) Methane + CaCO₃

b) Ethane + CaCO₃

c) Acetone + CaCO₃

d) Ethane + CaO

19 / 50

19. Which of the following compounds is the most acidic?

a) CH₃COOH

b) ClCH₂COOH

c) CH₃CH₂COOH

d) FCH₂COOH

20 / 50

20. Acetic acid undergoes reduction with LiAlH₄ to give:

a) Ethanol

b) Ethane

c) Ethanal

d) Ethyne

21 / 50

21. Butyric acid reacts with PCl₅ to give:

a) Benzoyl chloride

b) 1-Chlorobutane

c) Butyryl chloride

d) 1-Chloropropane

22 / 50

22. Which reagents will convert acetic acid into acetyl chloride?

a) NaCl

b) HCl/ZnCl₂

c) SOCl₂

d) HCl

e) HIO₄

23 / 50

23. Which of the following compounds on treatment with NaHCO₃ will liberate CO₂?

a) Acetic acid

b) Ethylamine

c) Acetone

d) Ethyl alcoholEthyl alcohol

e) Acetaldehyde

24 / 50

24. The characteristic reaction of carboxylic acids is:

a) Electrophilic addition

b) Electrophilic substitution

c) Nucleophilic addition

d) Nucleophilic substitution

25 / 50

25. Propanenitrile undergoes acid-hydrolysis to give:

a) Formic acid

b) Propionic acid

c) Acetic acid

d) Butyric acid

26 / 50

26. Which compound has the highest boiling point?

a) CH₃CH₃

b) CH₃OCH₃

c) CH₃CH₂OH

d) CH₃COOH

e) (C₂H₅)₂O

27 / 50

27. Which of the following statements is false about the acid strength of acetic acid?

a) Acetic acid is a stronger acid than monochloroacetic acid.

b) Acetic acid is a stronger acid than propionic acid.

c) Acetic acid is a weaker acid than trichloroacetic acid.

d) Acetic acid is a weaker acid than formic acid.

28 / 50

28. The greater acidity of carboxylic acids compared to alcohols arises primarily from:

a) the electron-donating effect of the hydroxyl group

b) the electron-withdrawing effect of the carboxyl oxygen

c) the acidity of α-hydrogens of carboxylic acids

d) the resonance stability associated with the carboxylate ion

29 / 50

29. When carboxylic acids and dicarboxylic acids have similar molar weight, how do their melting points compare?

a) Carboxylic acids have greater melting points

b) Dicarboxylic acids have greater melting pointsDicarboxylic acids have greater melting points

c) Both acids have similar melting points

d) No consistent trend exists

30 / 50

30. Check the incorrect statement:

a) Acetic acid is present in sour milk

b) Formic acid is present in insect bites

c) Tartaric acid is present in grapes

d) Citric acid is a tricarboxylic acid

31 / 50

31. What is the hybridization and geometry of the carbonyl carbon in carboxylic acids and their derivatives?

a) sp, tetrahedral

b) sp², trigonal planar

c) sp, tetrahedral

d) Both A and B

32 / 50

32. What is the hybridization of the carbonyl oxygen in carboxylic acids?

a) sp

b) sp²

c) sp³

d) s-sp

33 / 50

33. Which of the following is the incorrect statement:

a) Aliphatic monocarboxylic acids are colorless

b) Carboxylic acids are soluble in non polar solvent

c) B.P of Carboxylic acids is greater than alcohols

d) The hydrogen bonding in Carboxylic acids mostly occurs in cyclic dimer form

34 / 50

34. When ethyl benzene reacts with potassium permanganate under acidic conditions, the ethyl benzene is converted into?

a) Cumene

b) Anisole

c) Benzoic Acid

d) Phenetole

35 / 50

35. When nitrile reacts with water in the presence of acid, it changes into ____ with the liberation of ____.

a) Carboxylic acid, Nitrogen gas

b) Carboxylic acid, Ammonia gas

c) Alkane, Hydrogen gasAlkane, Hydrogen gas

d) None

36 / 50

36. When Carboxylic acid is treated with SOCl₂ the product is:

a) Acyl Halide

b) Ester

c) Acid Anhydride

d) none

37 / 50

37. Condensation of two molecules of Carboxylic acids gives

a) Acid Anhydride

b) Acetate

c) Glacial Acetic Acid

d) Ester

38 / 50

38. When ester is hydrolyzed it gives :

a) Ether and Alcohol

b) Alcohol and Carboxylic Acid

c) Ketone and Alcohol

d) Acid Halide and Carboxylic acid

39 / 50

39. Amides can be produced by the reaction off Carboxylic acid with:

a) Amines

b) Ammonia

c) Imines

d) Nitrogen

40 / 50

40. Carboxylic acids can be reduced by lithium aluminum hydrides to produce

a) Esters

b) Aldehyde

c) Acid Aldehyde

d) Alcohol

41 / 50

41. Formula of tartaric acid is:

a) C₆H₈O₇

b) C₄H₆O₅

c) C₄H₆O₆

d) CH₃COOH

42 / 50

42. Which of the following is used in the preparation of aspirin?

a) Citric Acid

b) Malic Acid

c) Tartaric Acid

d) Salicylic Acid

43 / 50

43. Acid halides are formed from Carboxylic acids by replacing their hydroxyl group with

a) Alkyl or Aryl group

b) Halogen

c) O-X

d) None of these

44 / 50

44. Esters are formed from Carboxylic acids by replacing their hydrogen with an/a:

a) Alkyl group

b) Aryl group

c) Ethoxy group

d) A and B

45 / 50

45. Which of the following is not the method for the production of Carboxylic acid

a) Hydrolysis of Nitriles

b) Carbonation of Grignard Reagent

c) Oxidation of alkyl Benzene

d) Reduction of Aldehyde

46 / 50

46. When Carboxylic acids are dissolved in water they undergo dissociation they produce carboxylate ion, this dissociation occurs because the carbon atom in the carboxyl group is

a) Electron withdrawing

b) Electron Donating

c) HyperPolarized

d) None

47 / 50

47. Select the correct statement regarding Carboxylic acids

a) They are stronger Acids than mineral acids

b) They are weaker acids than alcohol,phenol, ether

c) They are weaker acids than mineral acids

d) All are incorrect

48 / 50

48. Solubility of Carboxylic acid is _______ proportional to the number of carbons in the chain

a) Directly

b) Inversely

c) Carboxylic acids are insoluble in water

d) None

49 / 50

49. With the length of chain intensity of odour of Carboxylic acid :

a) Increases

b) Decreases

c) Remains Same

d) First increase then Decrease

50 / 50

50. Which of the following is the function of Carboxylic acid in food industry :

a) Acidity regulation

b) Preservation

c) Flavoring

d) AOT

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