True or false: (a) Reduction occurs if the oxidation number of an element increases

Verified step by step guidance

1. Understand the concept of oxidation and reduction: Oxidation involves the loss of electrons, leading to an increase in oxidation number, while reduction involves the gain of electrons, leading to a decrease in oxidation number.
2. Identify the statement: The statement claims that reduction occurs if the oxidation number of an element increases.
3. Recall the definition of reduction: Reduction is characterized by a decrease in the oxidation number of an element.
4. Compare the statement with the definition: The statement suggests an increase in oxidation number, which contradicts the definition of reduction.
5. Conclude based on the comparison: Since reduction involves a decrease in oxidation number, the statement is false.

Key Concepts

Oxidation and Reduction

Oxidation and reduction are chemical processes that involve the transfer of electrons between substances. Oxidation refers to the loss of electrons, resulting in an increase in oxidation state, while reduction involves the gain of electrons, leading to a decrease in oxidation state. These processes are interconnected and occur simultaneously in redox reactions.

Oxidation Number

The oxidation number is a theoretical charge assigned to an atom in a compound, reflecting its degree of oxidation. It helps in identifying how many electrons an atom has gained, lost, or shared during a chemical reaction. Changes in oxidation numbers are crucial for determining whether a substance is oxidized or reduced.

True or False Statements in Chemistry

In chemistry, true or false statements often require a clear understanding of definitions and principles. For example, the statement about reduction and oxidation numbers hinges on the definitions of these terms. Recognizing that an increase in oxidation number indicates oxidation, not reduction, is essential for evaluating such statements accurately.