a redox reaction is a reaction in which
1.only reduction occurs
2.only oxidation occurs
3.reduction&oxidation occur at the same time
4.reduction occurs first and then oxidation occurs
i think its 3 or 4.
It's 3. If something gains electrons it must gain them from somewhere. And that somewhere is losing electrons at the same time. Intermediates may be involved and some of them may be charged; however, I would shy away from 4 because if reduction occurs first followed by oxdn, why couldn't oxdn occur first followed by redn?
You are correct! A redox reaction, or a reduction-oxidation reaction, is one in which both reduction and oxidation occur at the same time. In redox reactions, electrons are transferred from one species to another, resulting in a change of oxidation states.
To identify a redox reaction, you can follow these steps:
1. Determine the oxidation states of each element in the reactants and products.
2. Compare the oxidations states before and after the reaction.
3. If there is an increase in oxidation state for at least one element, it undergoes oxidation.
4. If there is a decrease in oxidation state for at least one element, it undergoes reduction.
5. If both oxidation and reduction are happening simultaneously, it is a redox reaction.
So, to answer your question, 3. reduction and oxidation occur at the same time, is the correct answer.