(a)[1]
Explain why the elements in Group VII have similar chemical properties.
(b(i))[1]
Describe what you observe in this reaction. $\text{Cl}_2(g) + 2\text{I}^-(aq) \rightarrow \text{I}_2(aq) + 2\text{Cl}^-(aq)$
(b(ii))[1]
Use the equation to show that oxidation occurs in this reaction.
(b(iii))[1]
Use the equation to show that reduction occurs in this reaction.
(c)[2]
Describe the chemical test used for chlorine gas. Give both the test and the observation.
(d(i))[2]
The pressure of chlorine is increased. Describe and explain the change in the rate of this reaction.
(d(ii))[2]
Iron(III) chloride can act as a catalyst in some reactions. Explain how a catalyst increases the rate of a reaction.