Which of the following is not an example of secondary Air Pollutant?

Which of the following is not an example of secondary Air Pollutant?

Q. Which of the following is not an example of secondary Air Pollutant?

  1. Formaldehyde
  2. Ozone
  3. Acid Mist
  4. Halogen Compounds

Answer: Halogen Compounds

Gkseries: Gkseries.com is a premier website to provide complete solution for online preparation of different competitive exams like UPSC, SBI PO, SBI clerical, PCS, IPS, IAS, IBPS PO, IBPS Clerical exam etc. & other graduate and post-graduate exams. Learn more on about us page