Chlorofluorocarbons are a group of compounds consisting of which of the following?
a. chlorophyll, fluorescent gas, radon, and carbon
b. chlorine, fluorine, carbon, and hydrogen
c. Chlorine bleach, fluorescent gas, and carbons
d. water vapor, chlorine, radon, and carbon
Question 2Which of the following is a colorless, radioactive gas formed by the decay of radium?
a. radon c. nitrous oxide
b. carbon monoxide d. ozone