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Hardness of matter is what type of property?

Answer and explanation

Correct answer: Physical property

Hardness describes how strongly a material resists scratching, cutting, pressing or wearing. It can be observed or measured without changing the substance into a different substance. For example, comparing which material scratches another concerns a physical feature, even though the result may help identify the material. A physical property can be studied without changing chemical composition, while a chemical property concerns the ability to undergo a chemical reaction.

Therefore, option A, physical property, is correct. Hardness is not a chemical or nuclear property, and it is certainly not an optical illusion. The key test is whether a new substance is formed during the observation. Since testing hardness does not require formation of a new substance, it belongs to physical properties.

Related tags

ChemistryNature-Of-MatterClass-11

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