Answer: Inclined plane, simple machine consisting of a sloping surface, used for raising heavy bodies. The force required to move an object up the incline is less than the weight being raised, discounting friction. The steeper the slope, or incline, the more nearly the required force approaches the actual weight.
Explanation:
Some of the reactants or the products are in the gaseous phase.
A. Sugar... Because the others are mixes of things and combinations. Sugar is pure and on its own.
I hope this helps!
For the first one the answer is B. and the second one is D.