The air pollutant unknown in nature is

  • A NO
  • B CO
  • C HCHO
  • D DDT
jamb 2000chemistry

The correct answer is C. HCHO

Formaldehyde (HCHO) is the most important carcinogen in outdoor air among the 187 hazardous air pollutants (HAPs) identified by the U.S. Environmental Protection Agency (EPA)

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