Chapter 20, Problem 1STP

Interpretation Introduction

Interpretation: The option that is not the process of oxidation is to be chosen from the given options.

Concept Introduction:

Oxidation is the process in which oxygen or an electronegative element is added or the removal of hydrogen. Oxidation in terms of electrons can be defined as the process where an atom loses one or more electrons.

The oxidation number of an element represents the count of electrons that an atom in a molecule can share, either lose or gain.

Answer to Problem 1STP

Correct answer: The correct option is ‘A’.

Explanation of Solution

Reason for correct option: Loss of electron from an atom tends to increase in oxidation number. This process is called oxidation. Whereas, the gain of electrons, decreases the oxidation number which is called reduction. Therefore, a decrease in oxidation number is not the oxidation reaction.

Conclusion

Reasons for incorrect options:

Option B, Option C, and Option D: The complete loss of electrons, gain of oxygen, and loss of hydrogen by a covalent molecule are incorrect because all these conditions correspond to the process of oxidation.