(i) From the metals copper, zinc, magnesium, sodium and iron, select the metal in each case which:
(a) Does not react with dil. hydrochloric acid.
(b) Has a hydroxide that reacts with both acids and alkalies.
(c) Does not react with cold water but reacts with steam when heated.
(d) Can form +2 and +3 ions.
(ii) Arrange the metals in decreasing order of reactivity.