1. The effects of toxic gases depend on the ________.
  1. weight, concentration, and exposure time
  2. concentration, temperature, and toxicity
  3. concentration, toxicity, and exposure time
  4. specific gravity, explosive range, and concentration
Correct!  The correct answer is C. concentration, toxicity, and exposure time.
Statement No. 54:  The effects of toxic gases depend on the concentration, toxicity, and exposure time.