Reducing agents ----- electrons

Find the oxidizing and reducing agents in the reaction (i) 2H_gCl_2+ SnCl_2 rarr Hg_2Cl_2 + SnCl_4

Find the oxidizing and reducing agents in the reaction (i) 3CuO + 2NH_3 rarr 3Cu + N_2 + 3H_2O .

Predict the correct statement and correct the wrong one. In a redox reaction the oxiding agent gains electrons.

Identify the oxidising and reducing agents in the following reaction : C + O_2 rarr CO_2

Identify the oxidising and reducing agents in the following reaction : 2FeCl_3 + H_2S rarr 2FeCl_2 + 2HCL + S

Identify the oxidising and reducing agents in the following reaction : Cu + 4HNO_3 rarr Cu(NO_3)_2 + 2NO_2 + 2H_2O

H_2S acts only as reducing agent while SO_2 acts as an oxidising as well as reducing agent. Why?

Why Sm^(2+) , Eu^(2+) and Yb^(2+) ions in solutions are good reducing agents but an aqueous solution of Ce^(4+) is a good oxidising agent?

Give one example of a redox reaction. Indicate the oxidizing and reducing agents in that redox reaction.

Out of C and CO, which is better reducing agent at the lower temperature range in the blast furnance to extract iron from the oxide ore?