Acid and Bases MCQs

71. Which acid is present in gastric juice?
A) HCl
B) H₂SO₄
C) HNO₃
D) CH₃COOH
Answer: A

72. Which acid is used in batteries?
A) HCl
B) H₂SO₄
C) HNO₃
D) CH₃COOH
Answer: B

73. Which acid is triprotic?
A) HCl
B) H₂SO₄
C) H₃PO₄
D) HNO₃
Answer: C

74. Which base is used in fertilizers?
A) NH₃
B) NaOH
C) KOH
D) CaO
Answer: A

75. Which oxide forms acid in water?
A) Na₂O
B) CaO
C) CO₂
D) MgO
Answer: C

76. Which oxide forms base in water?
A) CO₂
B) SO₂
C) Na₂O
D) NO₂
Answer: C

77. Which substance is neutral?
A) HCl
B) NaOH
C) NaCl
D) NH₃
Answer: C

78. Which solution turns phenolphthalein colorless?
A) Base
B) Acid
C) Salt
D) Neutral
Answer: B

79. Which acid is used in fertilizers?
A) HCl
B) HNO₃
C) CH₃COOH
D) H₂CO₃
Answer: B