Polymers - Online Test

Total Number of Questions in this Test: 10
Total Number of Questions Answered: 0
Total Number of Questions Skipped: 0


Time left:
 
Question : 1

acid rains are produced by

Options :
  •  excess NO2 and SO2 from burning fossil fuels
  •  excess production of NH3 by industry and coal gas
  •  excess release of CO by in combustion
  •  none of these