Which of the following is not a chemical property?

a: reactivity with oxygen

b: malleability

c: flammability

d: reactivity with acid

B isn't a chemical property

a, c, and d are all chemical properties because they give information about how a substance will behave in the given reaction, and can't be found without the substance undergoing some sort of chemical reaction. b, on the other hand, is a physical property-it can be determined without changing the substance's chemical composition.