Question

Oxidation- reduction process includes all of the following except the?
A.Burning wood
B.Rusting of iron
C.Generation of power by a storage battery
D.Combustion of gasoline in an automobile engine
E.conduction of electric current in a copper wire

Answer 1

Hint: In the oxidation-reduction potential method, as the name suggests both the oxidation process and the reduction process takes place in a chemical reaction. Oxidation- reduction potential is also known by its sort form as ‘Redox reactions’.

Complete answer:
So, to solve this question, first we need to understand the meaning of the oxidation- Reduction reactions.
So, basically oxidation- Reduction reactions or redox reactions involves the transfer of electrons from the one element to the element in the given chemical reaction.
By the transfer of electrons between the elements, we refer to one of the elements gaining electrons while the other element loses electrons.
Atoms having more number of electrons have negative oxidation state whereas, the atoms with less number of electrons have positive oxidation state.
So, this gain and loss of electrons in a chemical reaction constitute the oxidation- Reduction reactions.
Now, coming to the options given in the question, we can see that only the last reaction i.e. option E – conduction of electric current in a copper wire is not an oxidation- Reduction reaction because it involves the transfer of electrons between different bands inside the copper wire.
While all the other options From A to D belong to the oxidation- Reduction reactions.
Therefore option E is the correct answer.

Note:
This transfer of electrons i.e. gain and the loss of electrons from the elements leads to the change in their oxidation states, because as we know that the oxidation state of the molecule depends on the number of electrons present in its outer valence shell.