Reactivity of the Halogens Quiz
Studying this course? Keep your progress in one place.
Pick an answer for each. Quizzes never use energy.
5 questions, one answer each
Each answer is checked as you go, with why.
See all 5 questions
1. What can a more reactive halogen do when added to a solution containing a less reactive halide?
- A. Nothing happens
- B. Displace the less reactive halogen from solution
- C. Neutralise the solution
- D. Form a precipitate only
2. What colour change would you observe if chlorine water is added to potassium bromide solution?
- A. Colourless to purple
- B. Colourless/pale green to orange
- C. Orange to colourless
- D. No colour change occurs
3. Do halogens react by gaining or losing electrons?
- A. Losing electrons
- B. Gaining electrons
- C. Neither, they share electrons only
- D. It varies randomly
4. Why does reactivity decrease down Group 7?
- A. The atoms become smaller, so lose electrons more easily
- B. The outer shell is at a higher energy level further from the nucleus, making it harder to gain an electron
- C. The number of protons decreases down the group
- D. Reactivity is unrelated to electron arrangement
5. A student adds iodine solution to potassium chloride solution and observes no reaction. Bromine water is then added to potassium iodide solution and a colour change to brown is seen. What do these two results together demonstrate?
- A. Iodine is more reactive than chlorine, and bromine is more reactive than iodine
- B. Iodine is less reactive than chlorine, and bromine is more reactive than iodine, consistent with reactivity decreasing down Group 7
- C. Chlorine and iodine are equally reactive
- D. Bromine is less reactive than iodine