Asked in UHS MDCAT 2017 2017

_is the major source of acid deposition in the atmosphere.

Correct answer: C. SO3

  • A. SiO2
  • B. CO2
  • C. SO3
  • D. Al2O3

Explanation

SO3 reacts with rain water to form H2SO4 (sulfuric acid) which is a major source of acid rain.

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