Group 7: the halogens Quiz
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5 questions, one answer each
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1. Which halogen is a liquid at room temperature?
- A. Chlorine
- B. Iodine
- C. Bromine
- D. Fluorine
2. What happens when chlorine water is added to potassium iodide solution?
- A. Iodine is displaced and the solution turns brown
- B. Nothing happens
- C. Bromine is formed and the solution turns orange
- D. Potassium is displaced
3. What is the trend in reactivity down Group 7?
- A. It increases
- B. It stays the same
- C. It increases then decreases
- D. It decreases
4. Which equation is balanced?
- A. Cl₂ + KBr → KCl + Br₂
- B. Cl₂ + 2KBr → 2KCl + Br₂
- C. Cl + KBr → KCl + Br
- D. Cl₂ + 2KBr → KCl + Br₂
5. Why is chlorine added to swimming pool water?
- A. To make the water denser
- B. To change the colour of the water
- C. To kill bacteria
- D. To make it alkaline