(a(i))[2]
W is green and contains Fe$^{2+}$ ions. Explain how W can be tested to show that Fe$^{2+}$ ions are present.
(a(ii))[2]
Excess W is added to acidified aqueous potassium manganate(VII). Describe the colour change observed from [BLANK] to [BLANK].
(a(iii))[2]
Describe what is seen when a few drops of aqueous ammonia are added first, followed by excess aqueous ammonia, to the mixture from (ii).
(b(i))[3]
Name the gas made in test 1. Explain how the student checks the gas to confirm what it is. Include the confirming observation.
(b(ii))[1]
The observations for test 1 are not complete. State one further observation made in test 1.
(b(iii))[1]
State the conclusion reached from test 2.
(b(iv))[1]
State the conclusion reached from test 3.
(b(v))[1]
Identify the acid used in test 1.
(b(vi))[1]
Suggest which metal X is.