general chemistry question help?
Which of the following reactions is an oxidation reduction
reaction?
a) NH4Cl(s) 6 NH3(g) + HCl(g)
b) 2NaBr(s) + Cl2(l) 6 2NaCl + Br2(s)
c) Fe2O3(s) + 6HClO4(aq) 6 2Fe(ClO4)3(aq) +
3H2O(l)
d) HCl(aq) + KOH(aq) 6 KCl(aq) + H2O(l)
e) CuCl2(aq) + H2S(aq) 6 CuS(s) + 2HCl(aq)
Update:and why is that the answer
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these are incomplete , which is the products and reactants, there needs to be a sufficient space or arrow indicating the product, more or less, it oxidises if it losses electrons, if it gains electrons its a reduction equation.
i.e
oxidised form of Permangenate Sol.-n = MnO4-(aq), reduced form = Mn2+
when the MnO4- is reduced there would be a colour change from purple to colourless,