Select the appropriate options and complete the following paragraph.
(oxygen, hydrogen, reduction, oxidation, never, always, redox, decomposition)_______ is the process in which a su bstance gains _______or loses hydrogen.________ is the process in which a substance gains _______ or loses oxygen. The reaction in which one reactant gets oxidised and the other reactant gets reduced is called as oxidation-reduction reaction or reaction________ Oxidation and reduction reactions ________ occur simultaneously.

Explanation

Oxidation is the process in which a substance gains oxygen or loses hydrogen. Reduction is the process in which a substance gains hydrogen or loses oxygen. The reaction in which one reactant gets oxidised and the other reactant or the same reactant gets reduced is called as oxidation-reduction reaction or redox reaction. Oxidation and reduction reactions always occur simultaneously.