Question

What is concentration of hydrogen sulphide when inhaled will be safe?

• A. 10 ppm
• B. 100ppm
• C. 1000 ppm
• D. 2000 ppm

Answer 1

The correct option is A 10 ppm

For hydrogen sulfide, it is allowable for workers to be exposed to concentrations of 10 parts per million, averaged over an eight-hour work shift, with the exposure not exceeding 15 parts per million.
1000ppm and 2000ppm have high probability of death and lose consciousness.