Acid and Bases MCQs

61. Which ion determines acidity?
A) OH⁻
B) H⁺
C) Na⁺
D) Cl⁻
Answer: B

62. Which ion determines basicity?
A) H⁺
B) Cl⁻
C) OH⁻
D) SO₄²⁻
Answer: C

63. Which indicator gives multiple color changes?
A) Litmus
B) Universal indicator
C) Phenolphthalein
D) Methyl orange
Answer: B

64. Which acid reacts with metals to produce hydrogen?
A) Bases
B) Acids
C) Salts
D) Oxides
Answer: B

65. Which base is sparingly soluble in water?
A) NaOH
B) KOH
C) Mg(OH)₂
D) NH₄OH
Answer: C

66. Which acid is used for cleaning metals?
A) HCl
B) H₂SO₄
C) CH₃COOH
D) H₂CO₃
Answer: A

67. What is the pH of lemon juice?
A) 2
B) 7
C) 9
D) 12
Answer: A

68. Which acid is used in tanning leather?
A) H₂SO₄
B) HCl
C) Formic acid
D) HNO₃
Answer: C

69. Which compound neutralizes bee sting?
A) Acid
B) Base
C) Salt
D) Water
Answer: B

70. Which compound neutralizes wasp sting?
A) Base
B) Acid
C) Salt
D) Water
Answer: B