Question

index on physical and chemical changes ​

Answer 1

Answer:

Physical and chemical index is the technical index of physical property, chemical component, and chemical property, indicating the quality of the product. ... Chemical indexes usually involve stability, flammability, acidity, alkalinity, oxidability, reducibility, crystal form, pH, etc.

Answer 2

Explanation:

Physical and chemical index is the technical index of physical property, chemical component, and chemical property, indicating the quality of the product. ... Chemical indexes usually involve stability, flammability, acidity, alkalinity, oxidability, reducibility, crystal form, pH, etc.