Chemical Engineering - Environmental Engineering - Discussion

1. Mercury produce toxicity or death with less than a gram.

Symptoms typically include sensory impairment (vision, hearing, speech) , disturbed sensation and a lack of coordination.

The consumption of fish is by far the most significant source of ingestion-related mercury exposure in humans and animals.

2. All types of asbestos fibers are known to cause serious health hazards in humans, affects lungs.

3. Hydrogen sulfide is a highly toxic and flammable gas (flammable range: 4.3-46%). Being heavier than air, it tends to accumulate at the bottom of poorly ventilated spaces.

Although very pungent at first, it quickly deadens the sense of smell, so victims may be unaware of its presence until it is too late.

The nervous system is most affected, the toxicity of H2S is comparable with that of carbon monoxide.

Mercury is more danger than cadmium.

So Mercury is the answer.

Cadmium is the right answer.