Air is a/an _________?
Correct answer: D. Mixture
- A. Compound
- B. Element
- C. Electrolyte
- D. Mixture
Explanation
Air is a mixture because it contains several gases, mainly nitrogen and oxygen, that are not chemically bonded in a fixed ratio. It is not a compound, whose elements would be chemically combined in a definite proportion; that is the likely mistaken choice.
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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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