Southwest Regional Drager BG4 Exam Taken from the 2019 Southwest Regional Mine Rescue Contest held in Ruidoso, New Mexico Progress Indicator: Question 4 of 30 4.   Table 1 1 - Component of Afterdamp 2 - Slightly soluble in water 3 - Toxic 4 - Asphyxiant 5 - Lighter than air 6 - Heavier than air 7 - Component of rock strata gas 8 - Not soluble in water Using Table 1, match the attributes with the gas.  The correct answer must contain all of the attributes shown in Table 1 for this gas. Nitrogen (N2) Choices: 1, 2, 3, 6 1, 4, 5, 7 2, 3 None of the above