A) Ethanoic acid
B) Propanoic acid
C) Butanoic acid
D) Methanoic acid
View AnswerA
2. Which of the following is a strong acid?
A) Acetic acid
B) Citric acid
C) Sulfuric acid
D) Formic acid
View AnswerC
3. Carboxylic acids are classified based on which criterion?
A) Number of carbon atoms
B) Number of functional groups
C) Degree of saturation
D) Presence of other functional groups
View AnswerA
4. What is the general formula for monocarboxylic acids?
A) CnH2nO2
B) CnH2n+1COOH
C) CnH2n+2O2
D) CnH2nO
View AnswerB
5. Which acid is known as the “king of acids”?
A) Hydrochloric acid
B) Nitric acid
C) Sulfuric acid
D) Phosphoric acid
View AnswerC
6. What physical property is typically observed in carboxylic acids?
A) High boiling points
B) Low volatility
C) Sweet smell
D) Non-polarity
View AnswerA
7. Which of the following acids is a dicarboxylic acid?
A) Acetic acid
B) Malonic acid
C) Formic acid
D) Lactic acid
View AnswerB
8. Which of the following is a common method for the preparation of carboxylic acids?
A) Oxidation of alcohols
B) Reduction of ketones
C) Hydrolysis of esters
D) All of the above
View AnswerD
9. What is the product of the reaction between sodium bicarbonate and acetic acid?
A) Water
B) Sodium acetate
C) Carbon dioxide
D) All of the above
View AnswerD
10. What type of reaction occurs when a carboxylic acid reacts with an alcohol?
A) Hydrolysis
B) Esterification
C) Saponification
D) Neutralization
View AnswerB
11. Which functional group is present in carboxylic acids?
A) Hydroxyl
B) Carbonyl
C) Carboxyl
D) Amine
View AnswerC
12. What is the acidity trend for carboxylic acids?
A) Increases with molecular weight
B) Decreases with branching
C) Increases with electronegative substituents
D) Decreases with more hydroxyl groups
View AnswerC
13. Which carboxylic acid is found in vinegar?
A) Lactic acid
B) Acetic acid
C) Formic acid
D) Citric acid
View AnswerB
14. Which of the following acids is used in the manufacture of fertilizers?
A) Nitric acid
B) Sulfuric acid
C) Phosphoric acid
D) All of the above
View AnswerD
15. Which method can be used to convert a primary alcohol into a carboxylic acid?
A) Reduction
B) Oxidation
C) Esterification
D) Hydrolysis
View AnswerB
16. What is the product of the complete oxidation of a primary alcohol?
A) Aldehyde
B) Ketone
C) Carboxylic acid
D) Ether
View AnswerC
17. What is the name of the acid formed when carbon dioxide reacts with water?
A) Carbonic acid
B) Acetic acid
C) Citric acid
D) Sulfuric acid
View AnswerA
18. Which of the following is a characteristic reaction of carboxylic acids?
A) Formation of alkynes
B) Esterification
C) Diels-Alder reaction
D) Grignard reaction
View AnswerB
19. Which compound is produced when a carboxylic acid reacts with a base?
A) Salt
B) Ester
C) Alcohol
D) H2O
View AnswerA
20. What happens when a carboxylic acid is heated with an alcohol in the presence of an acid catalyst?
A) Decarboxylation
B) Esterification
C) Neutralization
D) Hydrolysis
View AnswerB
21. Which of the following is the strongest acid?
A) Acetic acid
B) Formic acid
C) Benzoic acid
D) Lactic acid
View AnswerB
22. Which of the following compounds is a cyclic carboxylic acid?
A) Butyric acid
B) Valeric acid
C) Cyclopropanecarboxylic acid
D) Hexanoic acid
View AnswerC
23. Which reagent is used to convert carboxylic acids into aldehydes?
A) LiAlH4
B) DIBAL-H
C) NaBH4
D) H2/Pd
View AnswerB
24. Which type of acid is citric acid?
A) Monoacidic
B) Diacidic
C) Triacidic
D) Tetraacidic
View AnswerC
25. What is the general name for a carboxylic acid derived from a hydrocarbon?
A) Aromatic acid
B) Aliphatic acid
C) Fatty acid
D) Aromatic hydrocarbon
View AnswerC
26. What is the reaction between carboxylic acids and amines called?
A) Amide formation
B) Esterification
C) Hydrolysis
D) Neutralization
View AnswerA
27. Which of the following acids is used in pickling?
A) Hydrochloric acid
B) Acetic acid
C) Sulfuric acid
D) Nitric acid
View AnswerB
28. What is the structure of formic acid?
A) HCOOH
B) CH3COOH
C) C2H5COOH
D) C3H7COOH
View AnswerA
29. Which of the following acids is a natural preservative?
A) Citric acid
B) Tartaric acid
C) Acetic acid
D) All of the above
View AnswerD
30. Which type of reaction occurs when a carboxylic acid reacts with a thionyl chloride?
A) Formation of an acid chloride
B) Formation of an ester
C) Hydrolysis
D) Oxidation
View AnswerA
31. What is the common name for 2-hydroxypropanoic acid?
A) Acetic acid
B) Lactic acid
C) Citric acid
D) Malic acid
View AnswerB
32. Which carboxylic acid has a pungent odor and is found in ant bites?
A) Formic acid
B) Acetic acid
C) Butyric acid
D) Propionic acid
View AnswerA
33. How do carboxylic acids generally react with metals?
A) To form oxides
B) To form salts and hydrogen gas
C) To form halides
D) To form alcohols
View AnswerB
34. What is the primary product when a carboxylic acid undergoes dehydration?
A) Aldehyde
B) Alkene
C) Ester
D) Anhydride
View AnswerD
35. Which reaction involves the formation of an ester from a carboxylic acid and an alcohol?
A) Fischer esterification
B) Diels-Alder reaction
C) Aldol condensation
D) Michael addition
View AnswerA
36. Which of the following acids is a key component of DNA and RNA?
A) Formic acid
B) Phosphoric acid
C) Acetic acid
D) Lactic acid
View AnswerB
37. What is the effect of increasing the number of carbon atoms on the boiling point of carboxylic acids?
A) Decreases boiling point
B) Increases boiling point
C) No effect
D) Depends on the functional group
View AnswerB
38. Which carboxylic acid is a major component of citric fruit?
A) Lactic acid
B) Formic acid
C) Citric acid
D) Acetic acid
View AnswerC
39. What is the main feature that distinguishes carboxylic acids from alcohols?
A) Presence of a hydroxyl group
B) Presence of a carboxyl group
C) Presence of a carbonyl group
D) Presence of an alkene
View AnswerB
40. Which acid is used to make soap through saponification?
A) Acetic acid
B) Palmitic acid
C) Benzoic acid
D) Citric acid
View AnswerB
41. Which of the following statements is true about carboxylic acids?
A) They are generally soluble in water.
B) They have lower boiling points than alcohols.
C) They are neutral in pH.
D) They do not form hydrogen bonds.
View AnswerA
42. What is the main reaction of carboxylic acids with alcohols in acidic conditions?
A) Dehydration
B) Esterification
C) Reduction
D) Hydrolysis
View AnswerB
43. Which of the following compounds is the simplest carboxylic acid?
A) Propanoic acid
B) Butanoic acid
C) Ethanoic acid
D) Methanoic acid
View AnswerD
44. Which reagent can be used to convert a carboxylic acid to an amide?
A) NH3
B) H2
C) LiAlH4
D) NaOH
View AnswerA
45. What type of bond is primarily responsible for the high boiling points of carboxylic acids?
A) Ionic bonds
B) Covalent bonds
C) Hydrogen bonds
D) Van der Waals forces
View AnswerC
46. Which of the following is a carboxylic acid used in the food industry?
A) Acetic acid
B) Tartaric acid
C) Citric acid
D) All of the above
View AnswerD
47. What is the primary use of sulfuric acid in carboxylic acid preparation?
A) Oxidizing agent
B) Dehydrating agent
C) Reducing agent
D) Hydrolyzing agent
View AnswerB
48. Which carboxylic acid is associated with the smell of rancid butter?
A) Butyric acid
B) Propanoic acid
C) Acetic acid
D) Lactic acid
View AnswerA
49. Which carboxylic acid can be formed by the oxidation of glucose?
A) Lactic acid
B) Citric acid
C) Acetic acid
D) Formic acid
View AnswerB
50. Which of the following methods is used to prepare carboxylic acids from alkyl halides?
A) Hydrolysis
B) Oxidation
C) Hydrolysis with water
D) Reduction
View AnswerC
51. What type of acid is found in lactic acid?
A) Monocarboxylic acid
B) Dicarboxylic acid
C) Aromatic acid
D) None of the above
View AnswerA
52. What is the primary product of the reaction of carboxylic acids with sodium carbonate?
A) Water
B) Sodium acetate
C) Carbon dioxide
D) All of the above
View AnswerD
53. What is the by-product formed when an acid reacts with a base?
A) Ester
B) Salt
C) Alcohol
D) Ether
View AnswerB
54. Which of the following acids is known for its use in car battery electrolyte?
A) Acetic acid
B) Nitric acid
C) Hydrochloric acid
D) Sulfuric acid
View AnswerD
55. What happens when a carboxylic acid is mixed with a strong base?
A) No reaction occurs
B) Formation of salt and water
C) Formation of gas
D) Neutralization without by-products
View AnswerB
56. Which acid is commonly used in hair straightening products?
A) Citric acid
B) Acetic acid
C) Lactic acid
D) Phosphoric acid
View AnswerC
57. Which carboxylic acid is produced during the fermentation of sugars?
A) Lactic acid
B) Acetic acid
C) Butyric acid
D) Propanoic acid
View AnswerA
58. Which of the following acids is a key intermediate in metabolic pathways?
A) Acetic acid
B) Lactic acid
C) Citric acid
D) All of the above
View AnswerD
59. What is the main feature that distinguishes strong acids from weak acids?
A) Ionization in solution
B) Molecular weight
C) Boiling point
D) Presence of carbon
View AnswerA
60. Which method can be used to prepare benzoic acid?
A) Hydrolysis of benzoyl chloride
B) Oxidation of toluene
C) Decarboxylation of phthalic acid
D) Both A and B
View AnswerD
61. Which of the following is a saturated carboxylic acid?
A) Butenoic acid
B) Butanoic acid
C) Benzoic acid
D) Cyclohexanoic acid
View AnswerB
62. What is the main use of carboxylic acids in the food industry?
A) Flavoring agents
B) Preservatives
C) pH regulators
D) All of the above
View AnswerD
63. Which of the following is a method to prepare fatty acids?
A) Saponification
B) Hydrolysis of triglycerides
C) Esterification
D) Both A and B
View AnswerD
64. What is the primary product when a carboxylic acid is treated with thionyl chloride?
A) Carboxylic acid chloride
B) Anhydride
C) Ester
D) Alcohol
View AnswerA
65. What is the product of the hydrolysis of an ester?
A) Carboxylic acid and alcohol
B) Ketone
C) Aldehyde
D) Amine
View AnswerA
66. Which of the following is a characteristic property of carboxylic acids?
A) They have a high pH.
B) They are generally soluble in water.
C) They do not form hydrogen bonds.
D) They are gaseous at room temperature.
View AnswerB
67. What is the role of sulfuric acid in the synthesis of carboxylic acids?
A) Catalyst
B) Reactant
C) Product
D) Solvent
View AnswerA
68. Which acid is responsible for the sour taste in citrus fruits?
A) Formic acid
B) Citric acid
C) Lactic acid
D) Acetic acid
View AnswerB
69. Which carboxylic acid is produced in muscle metabolism during intense exercise?
A) Lactic acid
B) Acetic acid
C) Butyric acid
D) Citric acid
View AnswerA
70. What is the reaction of a carboxylic acid with phosphorus pentachloride (PCl5)?
A) Formation of an acid chloride
B) Formation of an ester
C) Formation of a ketone
D) Hydrolysis
View AnswerA
71. Which carboxylic acid is known for its use in the preparation of esters and as a preservative?
A) Butyric acid
B) Citric acid
C) Acetic acid
D) Lactic acid
View AnswerC
72. Which of the following is a method for synthesizing carboxylic acids?
A) Oxidation of primary alcohols
B) Hydrolysis of nitriles
C) Decarboxylation of carboxylic acids
D) Both A and B
View AnswerD
73. What is the main property of a carboxylic acid that influences its reactivity?
A) Boiling point
B) Electronegativity
C) Polarity
D) Molecular weight
View AnswerC
74. Which carboxylic acid is associated with the process of fermentation?
A) Lactic acid
B) Acetic acid
C) Propanoic acid
D) Benzoic acid
View AnswerB
75. What is the main application of benzoic acid in the food industry?
A) Flavoring agent
B) Preservative
C) Coloring agent
D) Emulsifier
View AnswerB
76. Which acid is known for its use in vinegar?
A) Formic acid
B) Lactic acid
C) Acetic acid
D) Citric acid
View AnswerC
77. Which property of carboxylic acids affects their solubility in water?
A) Molecular size
B) Hydrogen bonding capability
C) Density
D) Boiling point
View AnswerB
78. Which of the following is a strong acid?
A) Acetic acid
B) Hydrochloric acid
C) Lactic acid
D) Benzoic acid
View AnswerB
79. What is the outcome of reacting acetic acid with sodium bicarbonate?
A) Formation of sodium acetate and carbon dioxide
B) Formation of water and sodium acetate
C) Formation of sodium chloride
D) No reaction
View AnswerA
80. Which method is used to convert an alcohol into a carboxylic acid?
A) Oxidation
B) Reduction
C) Hydrolysis
D) Esterification
View AnswerA
81. Which of the following compounds has the highest acidity?
A) Methanoic acid
B) Ethanoic acid
C) Butanoic acid
D) Propanoic acid
View AnswerA
82. What is the primary use of formic acid in agriculture?
A) Fertilizer
B) Herbicide
C) Pesticide
D) Soil conditioner
View AnswerC
83. Which of the following is a method for producing carboxylic acids from alkenes?
A) Ozonolysis
B) Hydration
C) Hydrolysis
D) Both A and B
View AnswerD
84. What is the primary product formed when a carboxylic acid reacts with a primary alcohol?
A) Ketone
B) Ester
C) Amide
D) Aldehyde
View AnswerB
85. Which of the following is a characteristic reaction of carboxylic acids?
A) Esterification
B) Reduction
C) Halogenation
D) Aromatic substitution
View AnswerA
86. What type of reaction occurs when a carboxylic acid reacts with an alcohol?
A) Addition
B) Elimination
C) Esterification
D) Substitution
View AnswerC
87. Which of the following is a dicarboxylic acid?
A) Butanoic acid
B) Oxalic acid
C) Acetic acid
D) Formic acid
View AnswerB
88. Which property of carboxylic acids affects their boiling points?
A) Hydrogen bonding
B) Molecular weight
C) Presence of functional groups
D) All of the above
View AnswerD
89. Which carboxylic acid is known for its role in the Krebs cycle?
A) Citric acid
B) Acetic acid
C) Butyric acid
D) Lactic acid
View AnswerA
90. Which of the following carboxylic acids is a product of incomplete combustion of organic matter?
A) Acetic acid
B) Lactic acid
C) Formic acid
D) Propanoic acid
View AnswerC
91. What is the by-product of the reaction between a carboxylic acid and an alcohol?
A) Water
B) Carbon dioxide
C) Ester
D) Ether
View AnswerA
92. Which carboxylic acid is commonly found in dairy products?
A) Acetic acid
B) Lactic acid
C) Citric acid
D) Malic acid
View AnswerB
93. What is the effect of increasing carbon chain length on the boiling point of carboxylic acids?
A) Decreases boiling point
B) Increases boiling point
C) No effect
D) It depends on the functional group
View AnswerB
94. Which of the following acids is considered a strong acid?
A) Acetic acid
B) Citric acid
C) Sulfuric acid
D) Lactic acid
View AnswerC
95. What happens when carboxylic acids react with metals?
A) No reaction occurs
B) Formation of hydrogen gas
C) Formation of salts
D) Both B and C
View AnswerD
96. What is the main use of acetic acid in industry?
A) Solvent
B) Food preservative
C) Flavoring agent
D) All of the above
View AnswerD
97. Which of the following carboxylic acids is derived from the hydrolysis of fats?
A) Formic acid
B) Butyric acid
C) Palmitic acid
D) All of the above
View AnswerD
98. Which property makes carboxylic acids more reactive than alcohols?
A) Presence of a carbonyl group
B) Presence of a hydroxyl group
C) Presence of a carboxyl group
D) Presence of an alkene
View AnswerC
99. Which carboxylic acid is used in the production of nylon?
A) Acetic acid
B) Lactic acid
C) Adipic acid
D) Citric acid
View AnswerC
100. Which property of carboxylic acids contributes to their acidity?
A) Electronegativity of the carboxyl group
B) Size of the carbon chain
C) Hydrogen bonding
D) Presence of a double bond
View AnswerA