Question

What distinguishes a chemical property from a physical property?

A. Chemical properties describe the characteristics of a substance that are directly observable without changing the substance.

B. Chemical properties are only observable when a substance changes into a new substance.

C. Chemical properties always change depending on temperature or pressure.

D. Chemical properties only describe subjective characteristics that cannot be measured with scientific tools.

Answer 1

C. Chemical properties always change depending on temperature or pressure

Answer 2

C. Chemical properties always change depending on temperature or pressure.

Physical Change v/s Chemical Change:

• Physical changes are reversible in nature while chemical change leads to the formation of new products.
• No new substance is formed in a physical change while it occurs in case of chemical change.
• A physical property is a characteristic of a substance that can be observed or measured without changing the identity of the substance while a chemical property describes the ability of a substance to undergo a specific chemical change.
• When the reactants are mixed, the temperature change caused by the reaction is an indicator of a chemical change. Thus we can say that chemical properties always change depending on temperature or pressure.

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