The periodic table

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Question 15
Medium

The halogens in Group 7 of the periodic table exhibit clear trends in their reactivity and chemical properties.

a.

Explain the trend in reactivity (oxidising ability) as you go down Group 7 from fluorine to iodine.

[3]
b.

A student mixes chlorine water, Cl2(aq)\text{Cl}_2\text{(aq)}Cl2​(aq), with a solution of potassium bromide, KBr(aq)\text{KBr(aq)}KBr(aq).

  • State whether a displacement reaction occurs.
  • Write the balanced ionic equation for this reaction, including state symbols.
  • Describe the colour change observed in the solution.
[3]

The periodic table Questions

  1. GCSE
  2. /Chemistry
  3. /The periodic table