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Which of the following reactions are redox reactions? Check all that apply. View Available Hint(s) Check all that apply.
a.4Li(s)+O2(g)→2Li2O(s)
b.Mg(s)+Fe2+(aq)→Mg2+(aq)+Fe(s)
c.Pb(NO3)2(aq)+Na2SO4(aq)→ PbSO4(s)+2NaNO3(aq)
d.HBr(aq)+KOH(aq)→ H2O(l)+KBr(aq)

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Answer:

a and b are redox reactions

Explanation:

Redox reactions involves a transfer of electrons between two species (including reducing agent and oxidizing agent)

Whereas c and d are displacement reaction and neutralisation reaction respectively.

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