Acid present in acid rain may be__________________?
Correct answer: C. both A and B
- A. H2SO4
- B. HNO3
- C. both A and B
- D. none
Explanation
Sulfur dioxide is oxidised to sulfuric acid and nitrogen oxides form nitric acid in atmospheric moisture, so acid rain commonly contains both H2SO4 and HNO3. Carbonic acid from dissolved carbon dioxide may also contribute to natural rain acidity, but it is not among the listed choices. The likely mistake is selecting only H2SO4 because sulfur dioxide is a well-known acid-rain 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.
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