Question 2815 Deck General

The correct answer is B) smaller than normal concentrations of H2S. Individuals who have consumed alcohol within 24 hours prior to exposure to H2S have a reduced tolerance for the gas. Alcohol can impair the body's ability to metabolize and process H2S, making even smaller concentrations more harmful. Therefore, these individuals can only tolerate smaller than normal concentrations of H2S without experiencing the usual reactions. The other options are incorrect because individuals with recent alcohol consumption would not be able to tolerate moderate or unusually large concentrations of H2S (options A and D), nor would they be able to withstand longer exposure times (option C). Their reduced tolerance makes them more susceptible to the harmful effects of H2S.