Which of the following chemical reactions is an oxidation-reduction reaction?1PointsA B C

Is it possible to have a reaction in which oxidation occurs and reduction does not.Question 2Answera.Falseb.True

In oxidation -reduction reactions, each time a substance is oxidized, another is simultaneously reduced. Which of the below substances is in the reduced form and therefore the electron donor?Group of answer choicesNADHNAD+

For the following reaction, identify the element that was oxidized, the element that was reduced, and the oxidizing agent. Give an explanation for each answer.

Identify the substances that are oxidised and the substancesthat are reduced in the following reactions.(i) 4Na(s) + O2 (g) → 2Na2 O(s)(ii) CuO(s) + H2(g) → Cu(s) + H2 O(l)

In oxidation -reduction reactions, each time a substance is oxidized, another is simultaneously reduced. Which of the below substances has been oxidized and therefore the electron carrier?Group of answer choicesNADHNAD+Next