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NEET UG BIOLOGY MCQ: ENVIRONMENTAL ISSUES
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Photochemical smog formed in congested metropolitan cities mainly consist of
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Correct option: A
Ozone, peroxyacetyl nitrate and
Option A (Ozone, peroxyacetyl nitrate and) is correct because photochemical smog primarily consists of ozone, peroxyacetyl nitrate (PAN), and nitrogen oxides (NOx).
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A lake near a village suffered heavy mortality of fishes with in a few days. Consider the following reasons for this.
(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
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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