Which of the following is a characteristic of acids?
a) Bitter taste
b) Slippery feel
c) Sour taste
d) Turns red litmus blue ✔️ Answer: c) Sour taste
Which gas is released when an acid reacts with a metal?
a) Oxygen
b) Nitrogen
c) Hydrogen
d) Carbon dioxide ✔️ Answer: c) Hydrogen
Which of the following is an example of a strong acid?
a) Acetic acid
b) Hydrochloric acid
c) Citric acid
d) Carbonic acid ✔️ Answer: b) Hydrochloric acid
What is formed when an acid reacts with a base?
a) Salt and Water
b) Salt and Hydrogen
c) Oxygen and Water
d) Acid and Base ✔️ Answer: a) Salt and Water
What is the pH of a neutral solution?
a) 0
b) 7
c) 10
d) 14 ✔️ Answer: b) 7
What happens when an acid is added to water?
a) The solution becomes neutral
b) The solution becomes basic
c) The solution becomes acidic
d) The solution becomes colorless ✔️ Answer: c) The solution becomes acidic
Which of the following is the correct formula for sulfuric acid?
a) HCl
b) HNO₃
c) H₂SO₄
d) CH₃COOH ✔️ Answer: c) H₂SO₄
What is the role of an indicator in acid-base reactions?
a) To neutralize the acid
b) To show the strength of the acid
c) To indicate the pH of the solution
d) To change color based on the solution’s pH ✔️ Answer: d) To change color based on the solution’s pH
Which of the following is an example of a base?
a) HCl
b) NaOH
c) H₂SO₄
d) CH₃COOH ✔️ Answer: b) NaOH
Which of the following salts is formed when hydrochloric acid reacts with sodium hydroxide?
a) Sodium chloride
b) Sodium sulfate
c) Sodium nitrate
d) Sodium acetate ✔️ Answer: a) Sodium chloride
What is formed when calcium carbonate reacts with hydrochloric acid?
a) Water and carbon dioxide
b) Water and calcium chloride
c) Calcium chloride and carbon dioxide
d) Calcium hydroxide and carbon dioxide ✔️ Answer: c) Calcium chloride and carbon dioxide
Which of the following acids is found in vinegar?
a) Hydrochloric acid
b) Acetic acid
c) Citric acid
d) Sulfuric acid ✔️ Answer: b) Acetic acid
What is the color of phenolphthalein in a basic solution?
a) Colorless
b) Pink
c) Blue
d) Green ✔️ Answer: b) Pink
Which of the following is not an example of a salt?
a) Sodium chloride
b) Potassium nitrate
c) Calcium carbonate
d) Sodium hydroxide ✔️ Answer: d) Sodium hydroxide
Which of the following is the correct formula for nitric acid?
a) HNO₃
b) H₂SO₄
c) HCl
d) CH₃COOH ✔️ Answer: a) HNO₃
