Boiling point density conductivity color these may all be classified as the of a substance. a) nuclear properties b) physical properties c) chemical properties d) reactive properties

The answer would actually be B.

Those properties would certainly not be the nuclear properties, since those are given at the smallest value (electrons, particles, polarity, etc.) so it isn't A.

While it would be possible for C to be the answer, conductivity and density debunk that. Chemical properties are properties of matter that pertain to only chemical reactions.

And saving the best for last, D is actually just impossible. In the English language, reactive properties may be a proper phrase. But in science, there is only such a thing as reactivity. There are no such things as reactive properties.

Even if my explanations for incorrectness are wrong; my thesis for why B is correct is because, color is a physical property, the boiling point is a physical property, conductivity is a physical property.

Let me know if I'm wrong! :D