Acids, alkalis and indicators Quiz
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5 questions, one answer each
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1. Which colour shows a neutral solution with universal indicator?
- A. Red
- B. Purple
- C. Green
- D. Orange
2. Which ion makes a solution alkaline?
- A. OH⁻
- B. H⁺
- C. Cl⁻
- D. Na⁺
3. Which of these shows ethanoic acid is a weak acid?
- A. It has a high pH
- B. It reacts slower with magnesium than hydrochloric acid of the same concentration
- C. It turns litmus blue
- D. It contains hydroxide ions
4. What do the colours of litmus paper tell you?
- A. The exact pH
- B. The concentration of the solution
- C. The ions present
- D. Whether a solution is acidic or alkaline
5. Which gas is made when magnesium reacts with hydrochloric acid?
- A. Oxygen
- B. Carbon dioxide
- C. Chlorine
- D. Hydrogen