What is the pH of pure water at 25°C?
a) 1
b) 7
c) 9
d) 14
Answer: b

Which of the following is a property of acids?
a) Bitter taste
b) Slippery feel
c) Turns blue litmus paper red
d) Turns red litmus paper blue
Answer: c

Which of the following salts is formed from a strong acid and a strong base?
a) Sodium chloride (NaCl)
b) Ammonium chloride (NH₄Cl)
c) Calcium carbonate (CaCO₃)
d) Sodium acetate (CH₃COONa)
Answer: a

What is the name of the acid commonly found in vinegar?
a) Hydrochloric acid
b) Sulfuric acid
c) Acetic acid
d) Citric acid
Answer: c

What is the pH of a solution with a hydroxide ion concentration of 1×10−51 \times 10^{-5}1×10−5 M?
a) 5
b) 7
c) 9
d) 14
Answer: c

Which of the following substances can act as both an acid and a base?
a) Water
b) Sodium hydroxide
c) Hydrochloric acid
d) Sodium chloride
Answer: a

Which of the following acids is used in car batteries?
a) Hydrochloric acid
b) Sulfuric acid
c) Nitric acid
d) Acetic acid
Answer: b

The pH of lemon juice is approximately:
a) 2
b) 7
c) 9
d) 14
Answer: a

Which of the following is a strong base?
a) Ammonia (NH₃)
b) Sodium hydroxide (NaOH)
c) Magnesium hydroxide (Mg(OH)₂)
d) Calcium hydroxide (Ca(OH)₂)
Answer: b

What is the common name for sodium bicarbonate?
a) Table salt
b) Baking soda
c) Washing soda
d) Epsom salt
Answer: b