Spontaneity of RedOx Reactions?

Question

For all of the following experiments, under standard conditions, which species could be spontaneously produced (a, b, OR c)?

1) Crystals of I2 are added to a solution of NaCl.

a. Na

b. I-

c. No reaction

2) A silver wire is placed in a solution containing Cu2

a. Ag

b. No reaction

c. Ag2

3) Oxygen gas is bubbled through an acidified solution of Fe2

a. No reaction

b. H2O

c. Fe3

Answer 1

1)b

2)b

3)c