Please help me! Does each one increase, decrease, or stay the same?

What is the name of this hydrocarbon?

Sulfuric acid (a component of acid rain) reacts with limestone (calcium carbonate) to produce calcium sulfate and carbon dioxide. this damages buildings and statues made of limestone. which solution of sulfuric acid will damage these structures more quickly? a. 0.001% b. 0.005% c. 0.010% d. 0.015%

When an object falls through the air and encounters air resistance its overall speed will be than if it had not encountered air resistance? (one word answer)