Question

Reactivity also varies between non-metals. When chlorine solution is added to a solution of potassium iodide and to a solution of potassium bromide; a colour change is observer in both cases. When iodine is added to a solution of potassium chloride and to a solutio of potassium bromide; no change in colour is observed. a. Based on your knowledge and on these observations, what is the pattern reactivity of group 7 elements as one moves down the group - does it increa decrease or stays the same? b. Explain your answer ​

Answer 1

Explanation:

The order of reactivity is chlorine > bromine > iodine. This is because chlorine could displace bromine and iodine, bromine could only displace iodine, but iodine could not displace chlorine or bromine.