Chemistry Carboxylic Acid Online Mcqs Test

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Question 1

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

Question 2

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

Answer

Make it neutral

Answer

Increase acidity

Answer

Decrease acidity

Question 3

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

Answer

Oxidation of primary alcohols

Answer

Oxidation of aldehydes

Answer

Hydrolysis of nitriles

Answer

Reduction of ketones

Question 4

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

Answer

Fehling’s solution

Answer

Litmus paper

Answer

Benedict’s solution

Answer

Tollens reagent

Question 5

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

Question 6

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

Answer

C₂H₄O₂

Question 7

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

Answer

Another carboxylic acid

Answer

Acyl chlorides

Question 8

8. What is the IUPAC name for CH₃CH₂COOH?

Answer

Propanoic acid

Answer

Formic acid

Answer

Ethanoic acid

Answer

Butanoic acid

Question 9

9. Which of the following has the highest acidity?

Answer

Acetic acid

Answer

Propanoic acid

Answer

Butanoic acid

Answer

Formic acid

Question 10

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

Question 11

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

Question 12

12. What is the IUPAC name of tartaric acid?

Answer

Butanoic acid

Answer

2-Hydroxypropanoic acid

Answer

Hydroxyethanoic acid

Answer

2,3-Dihydroxybutanedioic acid

Question 13

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

Answer

H₂O/H⁺

Question 14

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

Answer

Sodium acetate

Question 15

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

Question 16

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

Answer

Formic acid + alcohol

Answer

Acetic acid + NaOH

Answer

Benzoic acid + water

Answer

Acetic acid + ammonia

Question 17

17. Carboxylic acids are classified as:

Answer

Organic acids

Question 18

18. What is the IUPAC name for CH₃COOH?

Answer

Methanoic acid

Answer

Acetic acid

Answer

Ethanoic acid

Answer

Formic acid

Question 19

19. What happens when a carboxylic acid is reduced?

Answer

Ketone is formed

Answer

Ester is formed

Answer

Alcohol is formed

Answer

Alkane is formed

Question 20

20. Which carboxylic acid is naturally found in vinegar?

Answer

Citric acid

Answer

Formic acid

Answer

Acetic acid

Answer

Lactic acid

Question 21

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

Answer

Acetic acid

Answer

Oxalic acid

Answer

Formic acid

Answer

Benzoic acid

Question 22

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

Question 23

23. What is the by-product of esterification?

Question 24

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

Question 25

25. Which group increases the acidity of carboxylic acids?

Question 26

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

Question 27

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

Answer

Pentanoic acid

Answer

Acetic acid

Answer

Butanoic acid

Answer

Formic acid

Question 28

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

Answer

Acyl chloride

Question 29

29. What happens when carboxylic acid reacts with alcohol?

Answer

Ester is formed

Answer

Aldehyde is formed

Answer

Acid anhydride is formed

Answer

Ketone is formed

Question 30

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

Answer

Addition of alkenes

Answer

Oxidation of aldehydes

Answer

Polymerization

Question 31

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

Answer

Sodium bicarbonate test

Answer

Bromine water test

Answer

Baeyer’s test

Answer

Tollen’s test

Question 32

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

Answer

Acetic acid

Answer

Oxalic acid

Answer

Formic acid

Answer

Citric acid

Question 33

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

Answer

Ionic bonding

Answer

Covalent bonding

Answer

Van der Waals forces

Answer

Hydrogen bonding

Question 34

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

Question 35

35. Which of the following acids is tribasic?

Answer

Citric acid

Answer

Propanoic acid

Answer

Acetic acid

Answer

Formic acid

Question 36

36. Which functional group is present in carboxylic acids?

Answer

–COOCH₃

Question 37

37. Which of the following is the strongest acid?

Answer

Formic acid

Answer

Acetic acid

Question 38

38. What is the structure of the carboxyl group?

Question 39

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

Answer

Acetic acid

Answer

Oxalic acid

Answer

Formic acid

Answer

Propanoic acid

Question 40

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

Answer

Presence of carbonyl and hydroxyl in –COOH

Answer

Aromatic nature

Answer

High molecular weight

Answer

Presence of hydroxyl group

Question 41

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

Answer

Esterification

Answer

Hydrolysis

Answer

Saponification

Question 42

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

Answer

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

Answer

Irregular pattern

Answer

Unaffected by chain length

Answer

Decreases with molar mass

Question 43

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

Answer

Hydrogen bonding

Answer

High melting point

Answer

Acidic behavior

Answer

Strong base

Question 44

44. What is the common name of methanoic acid?

Answer

Oxalic acid

Answer

Formic acid

Answer

Propionic acid

Answer

Acetic acid

Question 45

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

Answer

Sharp sour taste and high boiling point

Answer

High volatility

Answer

Bitter in taste

Answer

Insoluble in water

Question 46

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

Question 47

47. Which of the following is a dicarboxylic acid?

Answer

Propanoic acid

Answer

Formic acid

Answer

Acetic acid

Answer

Oxalic acid

Question 48

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

Answer

Methanoic acid

Answer

Acetic acid

Answer

Ethanoic acid

Answer

Formic acid

Question 49

49. Which of the following carboxylic acids is aromatic?

Answer

Propanoic acid

Answer

Formic acid

Answer

Acetic acid

Answer

Benzoic acid

Question 50

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

Answer

Salt and water

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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