Which of the following is not a condition for the formation of smog ?
Correct answer: D. winds
- A. sufficient NO
- B. sunlight
- C. less movement of air
- D. winds
Explanation
Smog formation is favoured by sunlight, nitrogen oxides and stagnant air, because pollutants remain concentrated and sunlight drives photochemical reactions. Strong winds disperse these pollutants, so winds are not a condition for smog formation. The likely mistake is choosing sufficient NO because the stem may be read as requiring only nitrogen monoxide rather than the broader nitrogen-oxide pollution.
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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.
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