Fundamentals of Fire Fighter Skills Evidence-Based Practices No. 1 Questions taken from Jones & Bartlett Fundamentals of Fire Fighter Skills (3rd Edition) Progress Indicator: Question 5 of 20 5.  Which of the following properties are associated with Hydrogen Sulfide gas: Choices: The gas is one of the most poisonous known. The gas is not soluble in water. The gas is yellowish, with an odor of rotten eggs. All of the above.