Question

Is iron pole rust an example of a physical or chemical change?

Answer 1

To answer this issue, we must first comprehend the distinction between physical and chemical change, as well as the idea of iron pole rusting. Then we must evaluate the features of iron pole rusting in order to get at a right response among the available alternatives, and only then can we arrive at the correct answer.

Complete answer:
Let us first comprehend some basic principles before moving on with the solution to this provided question:
1. Physical changes: a substance's appearance, not its chemical content, is altered.
2. Chemical transformations: transforming a material into a new one having a different chemical formula.
3. Rusting of Iron pole: Rusting refers to the production of rust on the surface of iron pole objects or structures, which is a combination of iron pole oxides. In a water-rich environment, rust is generated via a redox interaction between oxygen and iron pole (or high level of moisture). The development of a coating of a red, flaky material that easily breaks into powder defines the rusting of iron poles.
Because rusting occurs as a result of a chemical interaction between iron pole and air in the presence of moisture, it is a chemical alteration. The iron pole would not have rusted and gained a brown texture from its dull grey one if the chemical interaction between them had not occurred. As a result, a new material known as rust forms on the surface of the Iron pole.
The creation of new compounds and the development and breaking of strong chemical bonds describe chemical change. In these conditions, we produce $F{{e}^{II}}O$ and $F{{e}^{III}}O$ bonds by breaking iron pole-iron pole and oxygen-oxygen bonds.
Hence it is a chemical change

Note:
We've all seen photos of iconic bridges throughout the world, such as the Golden Gate on the west coast of the United States, New York's Hell's Gate Bridge, and, of course, Sydney's Harbour Bridge. Dedicated teams of corrosion engineers would continue to analyse the level of oxidation and strive to regulate the process to this day.