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NEET UG BIOLOGY MCQ: ENVIRONMENTAL ISSUES
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Which of the following level of sound may damage ear drum and can impair the hearing ability permanently?
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Correct option: D
150 dB
Option D (150 dB) is correct because sound levels at or above 150 dB can cause immediate and permanent damage to the ear drum and hearing ability.
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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