Name: Centrifugation Process
Uploaded: 2019-07-19
Duration: 3 min 4 s
Description: The solid particles in a liquid are often very small and move through filter paper. In such cases, the centrifugation process comes handy. Watch the process...

Question

When we mix iron filings with sulphur and grind it, a physical change takes place. However, if we heat the mixture, a chemical change takes place. Using the above example, give three differences between physical and chemical change.

Accepted Answer

When we mix iron filings with sulfur and grind it, a physical change takes place because only the physical properties of the mixture are changed. However, if we heat the mixture, a chemical change takes place because of the formation of FeS.

Three differences between physical and chemical change are as follows:

Physical change takes place only in texture, state, colour etc. while chemical change takes place in molecular properties also.

The characteristic property of the substance remains unaltered in case of a physical change while the characteristic property of substance completely changes in case of a chemical change.

In the case of physical change, no new products are formed but in the case of chemical change, new products are formed which have completely different properties from their constituents.

When we mix iron filings with sulphur and grind it, a physical change takes place. However, if we heat the mixture, a chemical change takes place. Using the above example, give three differences between physical and chemical change.

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