Group 7 (Halogens) Quiz
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5 questions, one answer each
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1. What colour and state is bromine at room temperature?
- A. Pale green gas
- B. Red-brown liquid
- C. Grey-black solid
- D. Colourless liquid
2. How does reactivity change going down Group 7?
- A. It increases
- B. It decreases
- C. It stays the same
- D. It increases then decreases
3. Chlorine gas is bubbled through potassium iodide solution. What is observed?
- A. No reaction occurs
- B. The solution turns brown as iodine forms
- C. The solution turns green
- D. A white precipitate forms
4. Why does reactivity decrease down Group 7?
- A. Atoms lose electrons more easily
- B. Atoms get smaller down the group
- C. Atoms get larger, so the outer shell is further from the nucleus and more shielded, making electron gain harder
- D. The number of protons decreases
5. Bromine water is added separately to potassium chloride solution and potassium iodide solution. What is observed?
- A. Both show a colour change
- B. Neither shows a colour change
- C. No change with potassium chloride; colour change with potassium iodide as bromine displaces iodine
- D. Colour change with potassium chloride only