Padamjot
  • 4
Poll

Which of the following is a secondary pollutant

  • 4

Poll Results

100%(a) PAN ( 4 voters )
0%(b) particulate matter
0%(c) hydrocarbons
0%(d) chloroflurocarbons
Based On 4 Votes

Participate in Poll, Choose Your Answer.

NCERT Important Questions Class 9 Science biology Chapter 14
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