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NEET UG BIOLOGY MCQ: ENVIRONMENTAL ISSUES
1
Medium
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Understanding
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Supreme court of India has ordered the Delhi government to take measures to improve the quality of air. The government started to use _________________ in public fleet.
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Correct option: A
Of CNG, instead of diesel
Option A (Of CNG, instead of diesel) is correct because CNG is a cleaner fuel than diesel.
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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
(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 Assertion: Water pollutants are measured by BOD.
Reason: If BOD is more, the water is polluted.
(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 Assertion: Water pollutants are measured by BOD.
Reason: If BOD is more, the water is polluted.