Chemistry Carboxylic Acid Online Mcqs Test

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Question 1

1. Which functional group is present in carboxylic acids?

Answer

–COOCH₃

Question 2

2. What is the structure of the carboxyl group?

Question 3

3. What is the by-product of esterification?

Question 4

4. Which of the following is an example of esterification?

Answer

Acetic acid + ammonia

Answer

Formic acid + alcohol

Answer

Benzoic acid + water

Answer

Acetic acid + NaOH

Question 5

5. Which carboxylic acid is used as a food preservative?

Answer

Acetic acid

Answer

Oxalic acid

Answer

Benzoic acid

Answer

Formic acid

Question 6

6. Which group increases the acidity of carboxylic acids?

Question 7

7. What happens when a carboxylic acid is reduced?

Answer

Alkane is formed

Answer

Ketone is formed

Answer

Ester is formed

Answer

Alcohol is formed

Question 8

8. Which reaction converts a carboxylic acid to an ester?

Answer

Esterification

Answer

Hydrolysis

Answer

Saponification

Question 9

9. Which of the following properties is NOT associated with carboxylic acids?

Answer

Strong base

Answer

Acidic behavior

Answer

Hydrogen bonding

Answer

High melting point

Question 10

10. Which carboxylic acid is naturally found in vinegar?

Answer

Lactic acid

Answer

Formic acid

Answer

Acetic acid

Answer

Citric acid

Question 11

11. Which of the following reacts with carboxylic acids to form acid anhydrides?

Answer

Acyl chlorides

Answer

Another carboxylic acid

Question 12

12. When carboxylic acids are heated with alcohols in the presence of acid, what is formed?

Question 13

13. Which method is commonly used to prepare carboxylic acids?

Answer

Oxidation of aldehydes

Answer

Polymerization

Answer

Addition of alkenes

Question 14

14. Which property of carboxylic acids makes them good hydrogen bond donors?

Answer

Aromatic nature

Answer

High molecular weight

Answer

Presence of carbonyl and hydroxyl in –COOH

Answer

Presence of hydroxyl group

Question 15

15. Which of the following is not a method of preparing carboxylic acids?

Answer

Hydrolysis of nitriles

Answer

Oxidation of aldehydes

Answer

Oxidation of primary alcohols

Answer

Reduction of ketones

Question 16

16. What is the pKa value of a typical carboxylic acid?

Question 17

17. What is the common name of methanoic acid?

Answer

Oxalic acid

Answer

Formic acid

Answer

Acetic acid

Answer

Propionic acid

Question 18

18. What is the IUPAC name of tartaric acid?

Answer

2,3-Dihydroxybutanedioic acid

Answer

2-Hydroxypropanoic acid

Answer

Butanoic acid

Answer

Hydroxyethanoic acid

Question 19

19. What is the boiling point trend in carboxylic acids?

Answer

Decreases with molar mass

Answer

Irregular pattern

Answer

Increases with molar mass due to stronger van der Waals and hydrogen bonding

Answer

Unaffected by chain length

Question 20

20. Which of the following carboxylic acids is aromatic?

Answer

Benzoic acid

Answer

Acetic acid

Answer

Formic acid

Answer

Propanoic acid

Question 21

21. Which of the following is the strongest acid?

Answer

Formic acid

Answer

Acetic acid

Question 22

22. Which of the following carboxylic acids occurs naturally in citrus fruits?

Answer

Oxalic acid

Answer

Formic acid

Answer

Citric acid

Answer

Acetic acid

Question 23

23. Which of the following compounds is the simplest carboxylic acid?

Answer

Formic acid

Answer

Oxalic acid

Answer

Propanoic acid

Answer

Acetic acid

Question 24

24. Which of the following is a common laboratory reagent used to oxidize alcohols to carboxylic acids?

Question 25

25. Which of the following is the molecular formula of acetic acid?

Answer

C₂H₄O₂

Question 26

26. Which of the following is a dicarboxylic acid?

Answer

Acetic acid

Answer

Oxalic acid

Answer

Propanoic acid

Answer

Formic acid

Question 27

27. What happens when carboxylic acid reacts with alcohol?

Answer

Aldehyde is formed

Answer

Acid anhydride is formed

Answer

Ketone is formed

Answer

Ester is formed

Question 28

28. What is the effect of electron-withdrawing groups on the acidity of carboxylic acids?

Answer

Decrease acidity

Answer

Make it neutral

Answer

Increase acidity

Question 29

29. Which of the following has the highest acidity?

Answer

Butanoic acid

Answer

Acetic acid

Answer

Formic acid

Answer

Propanoic acid

Question 30

30. Which of the following is a test for carboxylic acids?

Answer

Bromine water test

Answer

Tollen’s test

Answer

Baeyer’s test

Answer

Sodium bicarbonate test

Question 31

31. Which reagent converts a nitrile into a carboxylic acid?

Answer

H₂O/H⁺

Question 32

32. Which of the following will not react with carboxylic acid?

Question 33

33. Carboxylic acids are classified as:

Answer

Organic acids

Question 34

34. What is the IUPAC name for CH₃CH₂COOH?

Answer

Formic acid

Answer

Propanoic acid

Answer

Ethanoic acid

Answer

Butanoic acid

Question 35

35. What is the IUPAC name for CH₃COOH?

Answer

Formic acid

Answer

Methanoic acid

Answer

Ethanoic acid

Answer

Acetic acid

Question 36

36. Which of the following acids is tribasic?

Answer

Acetic acid

Answer

Citric acid

Answer

Propanoic acid

Answer

Formic acid

Question 37

37. Which of the following is the correct IUPAC name for HCOOH?

Answer

Formic acid

Answer

Ethanoic acid

Answer

Acetic acid

Answer

Methanoic acid

Question 38

38. What is the physical state of formic acid at room temperature?

Question 39

39. Which reagent is used to reduce carboxylic acids to alcohols?

Question 40

40. Which type of bonding causes high boiling points in carboxylic acids?

Answer

Van der Waals forces

Answer

Covalent bonding

Answer

Hydrogen bonding

Answer

Ionic bonding

Question 41

41. Which of the following compounds is formed when acetic acid is treated with NaHCO₃?

Answer

Sodium acetate

Question 42

42. Which base is commonly used in saponification of esters?

Question 43

43. What is formed when carboxylic acid reacts with a base?

Answer

Salt and water

Question 44

44. What is the product of the reaction of carboxylic acid with PCl₅?

Answer

Acyl chloride

Question 45

45. Which of the following is least soluble in water?

Answer

Acetic acid

Answer

Butanoic acid

Answer

Pentanoic acid

Answer

Formic acid

Question 46

46. Which of the following is a physical property of carboxylic acids?

Answer

Bitter in taste

Answer

High volatility

Answer

Insoluble in water

Answer

Sharp sour taste and high boiling point

Question 47

47. Which of the following reacts with carboxylic acid to give an acid chloride?

Question 48

48. Which of the following is used to test the acidic nature of carboxylic acids?

Answer

Tollens reagent

Answer

Benedict’s solution

Answer

Fehling’s solution

Answer

Litmus paper

Question 49

49. Which catalyst is commonly used in esterification of carboxylic acids?

Question 50

50. What is the result of the reaction between a carboxylic acid and ammonia?

Question 51

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Total Questions:	50
Time Allowed:	30 Minutes
Total Marks:	50
How to Attempt Test:	Please choose the right Option in MCQ-type question.
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