Which gases are used as a mixture for breathing in sea?
Correct answer: C. Helium and oxygen
- A. Oxygen and nitrogen
- B. Carbon dioxide and oxygen
- C. Helium and oxygen
- D. Helium and hydrogen
Explanation
Helium and oxygen are taken as a mix to adjust the partial pressure of oxygen according to the requirement.
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About Real and Ideal Gases
An ideal gas is modelled as particles with negligible volume and no intermolecular attraction, obeying Boyle's, Charles's and Avogadro's laws through PV = nRT. Real gases deviate from this behaviour, especially at high pressure and low temperature, because particle volume and attractive forces matter; the van der Waals equation explains these corrections.
Practise Gases
443 free Gases MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
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