Question

Which one of the following is a
reduction reaction?
2016
(a) 2Mg(s) + O2(g) - 2MgO(s)
(b) S(s) + O2(g) → SO2(g)
(c) 2HgO(s) → 2 Hg() + O2(g)
(d) Mg(s) + S (s)- MgS (s)
Heat​

Answer 1

Answer:

3 because there the reactant is broken into two products

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