Why are dilute acids less harmful than concentrated acids?
- a) They are less reactive.
- b) They have a lower pH.
- c) They produce fewer hydrogen ions.
- d) They cause less corrosion.
Answer: c) They produce fewer hydrogen ions.
Which of the following is a use of hydrochloric acid?
- a) Baking
- b) Water sterilization
- c) Battery production
- d) Paper production
Answer: b) Water sterilization
What is the taste of bases?
- a) Sweet
- b) Bitter
- c) Sour
- d) Salty
Answer: b) Bitter
What type of acid is found in lemon and other fruits?
- a) Hydrochloric acid
- b) Citric acid
- c) Sulfuric acid
- d) Nitric acid
Answer: b) Citric acid
What is the main constituent of bases?
- a) Hydrogen ions (H+)
- b) Hydroxide ions (OH-)
- c) Nitrate ions (NO3-)
- d) Sodium ions (Na+)
Answer: b) Hydroxide ions (OH-)
Which acid is used in the production of chemical fertilizers?
- a) Nitric acid
- b) Acetic acid
- c) Hydrochloric acid
- d) Citric acid
Answer: a) Nitric acid
What happens when an acid reacts with a metal?
- a) Liberation of CO2 gas
- b) Formation of water
- c) Liberation of hydrogen gas
- d) Formation of salt
Answer: c) Liberation of hydrogen gas
What is the product of the neutralization of hydrochloric acid and sodium hydroxide?
- a) Sodium chloride + water
- b) Hydrochloric acid + water
- c) Sodium hydroxide + water
- d) Hydrogen chloride + oxygen
Answer: a) Sodium chloride + water
How do antacids work in the stomach?
- a) By increasing acidity
- b) By neutralizing excess acid
- c) By promoting digestion
- d) By inhibiting the production of acid
Answer: b) By neutralizing excess acid