a. The green colour in the iron(ii) solution turns to brown
b. 2Fe2+(aq) → 2Fe3+(aq)
c.The equation shows that the Fe2+ ions have formed Fe3+ ions, i.e., each ion has lost an electron. This means the Fe2+ ions have been oxdised.
d.Cl2(g) → 2Cl-(aq)
e.The Cl2 molecules have formed Cl- ions, i.e., they have gained the electrons which the Fe2+ ions have lost. This means the Cl2 molecules have been reduced.
f.FeSO4 + Cl2 ------> FeCl2 + SO2 + O2
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