In each of the following reactions, identify the reactant that is oxidized and the reactant that…

In each of the following reactions, identify the reactant that
is oxidized and the reactant that is reduced:
(its multiple choice)
Number 1:
Br2(g)+2KI(aq)→2KBr(aq)+I2(s)

I− (in KI) loses electrons and is oxidized. Br2 gains electrons
and is reduced.

Br2 gains electrons and is oxidized. I− (in KI) loses electrons
and is reduced.

I− (in KI) gains electrons and is oxidized. Br2 loses electrons
and is reduced.

Br2 loses electrons and is oxidized. I− (in KI) gains electrons
and is reduced.
Number 2:
Sn(s)+Cu2+(aq)→Sn2+(aq)+Cu(s)

Sn loses electrons and is oxidized. Cu2+ gains electrons and is
reduced.

Cu2+ gains electrons and is oxidized. Sn loses electrons and is
reduced.

Cu2+ loses electrons and is oxidized. Sn gains electrons and is
reduced.

Sn gains electrons and is oxidized. Cu2+ loses electrons and is
reduced.
Number 3:
Fe(s)+CuSO4(aq)→FeSO4(aq)+Cu(s)

Fe loses electrons and is oxidized. Cu2+ (in CuSO4) gains
electrons and is reduced.

Cu2+ (in CuSO4) gains electrons and is oxidized. Fe loses
electrons and is reduced.

Cu2+ (in CuSO4) loses electrons and is oxidized. Fe gains
electrons and is reduced.

Fe gains electrons and is oxidized. Cu2+ (in CuSO4) loses
electrons and is reduced.