What does a negative E° (standard reduction potential) value of a redox couple indicate?
1
Redox couple is a stronger reducing agent than couple H+/H2 couple.
2
Redox couple is a weaker reducing agent than the H+/H2 couple.
3
Redox couple is a stronger oxidising agent than the H+/H2 couple.
4
Redox couple carry equivalent oxidising power as H+/H2 couple.