Which is better reducing agent at temperature 983 K, C or Co?

Which is poorest reducing agent?

Which is reducing agent in the reaction ? ZnO + C rarr Zn + CO

Although carbon and hydrogen are better reducing agents but they are not used to reduce metallic oxides at high temperatures. Why ?

The standard reduction potentials of Co^(2+) and Co^(3+) are -0.28 V and 1.8 V respectively. Which should be a better oxidising agent in water : Co^(2+) or Co^(3+) ?

Which is a stronger reducing agent, SbH_(3) or BiH_(3) , and why ?

Why is SO_2 a better reducing agent in alkaline medium than in acidic medium ?

Which is stronger reducing agent Cr^(2+) or Fe^(2+) and why ?

The reducing agent used in thermite process is

Out of C and CO, which is a better reducing agent for ZnO ?

Which one will be the strongest reducing agent and which one will be the weakest one ?