Question

name the reducing agent to obtain manganese from manganese dioxide

Answer 1

3MnO2 + 4Al -------> 3Mn + 2Al2O2 Here MnO2

is manganese oxide which is an oxidizing agent. Manganese oxide when reacts with aluminum or Al, it give rises to Manganese Mn and aluminum oxide or Al2O2.

So in the reaction of converting manganese oxide to manganese, you require reducing agent Al or aluminum.

Answer 2

Al2O2 is the reducing agent