Question

Select all the correct answers. Which chemical equations show an oxidation-reduction reaction?

Options:

Option 1: O2 + 2H2 → 2H2O
Option 2: MgSO4 + CaCl2 → MgCl2 + CaSO4
Option 3: 2Al + 6HCl → 2AlCl3 + 3H2
Option 4: FeCl2 + Na2CO3 → FeCO3 + 2NaCl

Answer 1

Option 2, Option 3, and Option 4 show oxidation-reduction reactions.

Step-by-step explanation:

An oxidation-reduction (redox) reaction involves the transfer of electrons between reactants. In these reactions, one reactant is oxidized (loses electrons) while another reactant is reduced (gains electrons).

1. Option 2: MgSO4 + CaCl2 → MgCl2 + CaSO4
2. Option 3: 2Al + 6HCl → 2AlCl3 + 3H2
3. Option 4: FeCl2 + Na2CO3 → FeCO3 + 2NaCl

These options show a transfer of electrons and thus represent oxidation-reduction reactions.