(a(i))[2]
Describe the observation made when aqueous chlorine is added to W and explain how this proves that W contains iodide ions.
(a(ii))[2]
Describe a different test, together with the observation, that shows W contains iodide ions.
(b)[2]
Describe how the flame test is carried out on W.
(c)[1]
Identify W.
(d)[2]
State three conclusions drawn from the observations when aqueous sodium hydroxide is added to X, the mixture is warmed and damp red litmus paper remains unchanged.
(e)[3]
Describe another test, and the observations from it, to identify the cation in X.
(f(i))[1]
Describe the effect on damp red litmus paper when ammonia gas is produced.
(f(ii))[1]
Identify the anion in X.