Achange in the properties of matter that does not change the identity of the substance is:

a: a chemical change

b: a physical change

c: a nuclear change

d: a covalent change

The correct answer is option B.

Explanation:

Chemical change is defined as the change of a substance which is observed during a reaction where the chemical composition identity of the substance gets changed.

Physical change is defined as the change which can be measured and whose value describes the state of physical system. For Example: State, density etc.

Nuclear change is defined as change when a nucleus of an undergoes fission or fusion that is combining of neutrons and protons to form new heavier atom.