Chemistry Engineering Question:
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Which of the following is NOT true of helium?
Answer:
1. deep sea divers breath a mixture of helium and oxygen
2. breathing helium causes a temporary change in the pitch and quality of one’s voice
3. helium gas is commonly used by dentists as a mild anesthetic
4. a mixture of helium and neon gas produced the first gas laser
Answer: C
2. breathing helium causes a temporary change in the pitch and quality of one’s voice
3. helium gas is commonly used by dentists as a mild anesthetic
4. a mixture of helium and neon gas produced the first gas laser
Answer: C
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