What are the oxidation numbers of the atoms in this reaction?

check all that apply.

mg(s) + 2hcl(aq) → mgcl2(aq) + h2(g)

0 for mg in mg and mgcl2

0 for mg(s) and h in h2

+1 for h in hcl

-1 for cl in hcl

+2 for mg in mgcl2

Answer : The correct options are:

0 for Mg(s) and H in

+1 for H in HCl

+1 for H in HCl

+2 for Mg in

Explanation :

The given chemical reaction is:

Oxidation state of Mg(s) is, 0

Oxidation state of hydrogen in HCl is, (+1)

Oxidation state of chlorine in HCl is, (-1)

Oxidation state of Mg in is, (+2)

Oxidation state of Cl in is, (-1)

Oxidation state of hydrogen in is, 0

The given reaction is a single displacement reaction in which the most reactive metal (Mg) displaces the least reactive element (H) from its compound.

It is also a redox reaction because the oxidation state of Mg changes from 0 to (+2) and shows oxidation and the oxidation state of hydrogen changes from (+1) to 0 and shows reduction.

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