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NEET UG BIOLOGY MCQ: ENVIRONMENTAL ISSUES
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Catalytic converters are fitted into automobiles to reduce the emission of harmful gases. Catalytic converters changes unburnt hydrocarbons into
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Correct option: A
Carbon dioxide and water
Option A (Carbon dioxide and water) is correct because catalytic converters oxidize unburnt hydrocarbons into carbon dioxide and water.
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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