SF6 gas______________?
Correct answer: C. is nontoxic
- A. is yellow in colour
- B. is lighter than air
- C. is nontoxic
- D. has pungent small
- E. none of the above
Explanation
Pure SF6 is a colourless, odourless and essentially nontoxic gas, although its decomposition products can be hazardous and it can cause asphyxiation in confined spaces. It is also much heavier than air, so the other descriptions are incorrect.
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