Acids, Bases and Salts Quiz
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5 questions, one answer each
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1. What gas is produced when zinc reacts with hydrochloric acid?
- A. Oxygen
- B. Carbon dioxide
- C. Hydrogen
- D. Chlorine
2. Which salt is produced when magnesium oxide reacts with sulfuric acid?
- A. Magnesium chloride
- B. Magnesium sulfate
- C. Magnesium nitrate
- D. Magnesium carbonate
3. What is the correct order of steps to prepare a pure, dry soluble salt from an insoluble carbonate?
- A. Evaporate, filter, react, crystallise
- B. React in excess, filter, evaporate, crystallise
- C. Crystallise, react, filter, evaporate
- D. Filter, react, crystallise, evaporate
4. A solution has a pH of 9. What can be concluded?
- A. It is acidic and contains excess H⁺ ions
- B. It is neutral
- C. It is alkaline and contains excess OH⁻ ions
- D. It cannot be determined
5. (HT) A solution's pH falls from 5 to 3. By what factor has the hydrogen ion concentration changed?
- A. It has doubled
- B. It has increased by a factor of 10
- C. It has increased by a factor of 100
- D. It has decreased by a factor of 100