Question

There are four substances, A, B C and D. A and C are pure substances. They cannot be broken down into anything simpler by chemical methods. B consists of A and D, which are not chemically bonded together. D is a pure substance. We can decompose D into A and C using chemical methods. How would we classify substance A, C, and D?
A: Substances A and C are elements, because they are pure substances that bond together to make substance D and cannot be broken using chemical processes . Substance D is a mixture, because it is a pure substance made up of A and C.


B: Substances A and C are compounds, because they are pure substances that bond together to make substance D and cannot be broken using chemical processes . Substance D is a mixture, because it is a pure substance made up of A and C.


C: Substances A and C are elements, because they are pure substances that bond together to make substance D and cannot be broken using chemical processes. Substance D is a compound, because it is a pure substance made up of A and C.


D: Substances A, C, and D, are elements. All pure substances are elements.

Answer 1

The answer is C Becuz D is a compound and that is the only answer that says it