Question

The removal of hydrogen from a substance is called reduction.
(A) True
(B) False

Answer 1

Oxidation and reduction are oppositely based and are interrelated to each other. Similarly, oxidising agents and reducing agents are interrelated to each other but different in functioning.

Complete answer:
Let us focus on the basic definitions of the terms given and hence, decide the answer;
Oxidation-
The addition of oxygen to any substance is known as oxidation. Also, the removal of hydrogen from any substance is known as oxidation.
This occurs when the oxidation number of an atom increases.
Reduction-
The removal of oxygen from any substance is known as reduction. Also, the addition of hydrogen to any substance is known as reduction.
This occurs when the oxidation number of an atom decreases.
For example:
$ZnO+C\to Zn+CO$
Here, as Zn is losing oxygen; it is being reduced. On the other hand, as C is gaining oxygen; it is being oxidised.
Thus, the removal of hydrogen is known as oxidation and not reduction.

Therefore, option (B) is correct.

Note:
Do note that the oxygen need not be present in the reaction for it to be called a redox reaction; but oxidation and reduction together are called a redox reaction.