Chemistry Engineering Question: Download Questions PDF
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
Download Chemistry Interview Questions And Answers
PDF
| Previous Question | Next Question |
| In the chemistry lab, for safety reasons, when a concentrated acid is mixed with water: | Which of the following has the same electron configuration as neon: |