Which of the following is not a secondary pollutant_________________?
Correct answer: D. carbon dioxide
- A. ozone
- B. carbonic acid
- C. sulphuric acid
- D. carbon dioxide
Explanation
Carbon dioxide is normally classified as a primary pollutant because it is released directly by respiration, combustion and other sources. Ozone, carbonic acid and sulphuric acid are formed in the atmosphere from other pollutants, so a student may incorrectly choose ozone because it is the best-known secondary pollutant.
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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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