When coal containing sulfur is burned, the sulfur is converted to ...

[B]

When coal containing sulfur is burned, the sulfur is converted to
 
  A) gaseous sulfur oxides that go up the smokestack.
  B) liquid sulfur oxides that stay behind as ash.
  C) solid sulfur oxides that stay behind as ash.
  D) Sulfur is converted to all of the above.

Question 2

The major part of the average exposure of humans to radiation comes from
 
  A) nuclear power plants.
  B) diagnostic X-rays.
  C) other human made sources.
  D) naturally occurring sources.

[Pariscourtney]

Answer to Question 1

A

Answer to Question 2

D

[B]

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