Question

Reduction reaction is the exact opposite of which reaction?
(A) Displacement reaction.
(B) Decomposition reaction.
(C) Oxidation reaction.
(D) None of these.

Answer 1

Hint: In the above question it is asked about the reaction which is exactly opposite of reduction reaction. Reduction reaction can be defined as a reaction where there is gain of electrons. So, basically we have to find out the reaction where there is loss of electrons.

Complete step by step solution:
We know that reduction reaction involves gain of electrons. And hence, we have to find out the reaction where loss of electrons takes place.
Let us discuss the given reaction one by one.
Displacement reaction:
Displacement reaction is a chemical reaction in which a more reactive element displaces a less reactive element from its compound. Both metals and nonmetals take part in displacement reactions.
Decomposition reaction:
A decomposition reaction is a reaction in which a compound breaks down into two or more simpler substances. Only one reactant is involved here.
Oxidation reaction:
Oxidation reaction is a reaction in which there is gain of oxygen or in other word, we can say that it is a reaction which involves loss of electrons.
Hence, we can conclude that oxidation reaction is opposite of reduction reaction.
Hence, option C is the correct option.

Note:
Most reactions take place around us is redox which means both oxidation and reduction reaction takes place. We can take an example of cellular respiration which is an oxidation-reduction or redox reaction. Respiration is a set of metabolic reactions, where there is both loss and gain of electrons.