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NEET UG BIOLOGY MCQ: ENVIRONMENTAL ISSUES
1
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Which one is odd w.r.t primary pollutant?
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Correct option: C
Option C () is correct because it is a secondary pollutant, formed from primary pollutants, while the others are directly emitted.
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(i) Lost of urea and phosphate fertilizer were used in the crops in the vicinity
(ii) The area was sprayed with DDT by an aircraft
(iii) The lake water turned green and stinky
(iv) Phytoplankton populations in the lake declined initially thereby greatly reducing photosynthesis. Which of the following is not used for disinfection of drinking water? World most problematic aquatic weed is