Question

12. (a) What do you understand by redox reactions?
(b) Explain oxidation and reduction in terms of loss or
gain of electrons.​

Answer 1

Answer:

(1) A redox (or oxidation-reduction) reaction is a type of chemical reaction that involves a transfer of electrons between two species. What is a "species"? We can tell there has been a transfer of electrons if there is any change in the oxidation number between the reactants and the products.

(2)Oxidation is the loss of electrons or an increase in the oxidation state of an atom, an ion, or of certain atoms in a molecule. Reduction is the gain of electrons or a decrease in the oxidation state of an atom, an ion, or of certain atoms in a molecule.

Answer 2

(a) An oxidation-reduction (redox) reaction is a type of chemical reaction that involves a transfer of electrons between two species. An oxidation-reduction reaction is any chemical reaction in which the oxidation number of a molecule, atom, or ion changes by gaining or losing an electron.

(b) Oxidation is the loss of electrons or an increase in the oxidation state of an atom, an ion, or of certain atoms in a molecule. Reduction is the gain of electrons or a decrease in the oxidation state of an atom, an ion, or of certain atoms in a molecule (a reduction in oxidation state).