The condition that indicates a polluted environment is : (A) 0.03% of CO2 in the atmosphere (B) eutr — JEE Mains Chemistry Past Papers Chemistry Question
Question
The condition that indicates a polluted environment is : (A) 0.03% of CO2 in the atmosphere (B) eutrophication (C) pH of rain water to be 5.6 (D) BOD value of 5 ppm
Answer: B
💡 Solution & Explanation
(2) Clean water would have B.O.D value of less than 5 ppm whereas highly polluted water coluld have a B.O.D value of 17 ppm or more. (3) The process in which nutrient enriched water bodies support a dense plant population which kill animal life by depriving it of oxygen results in subsequent loss of biodiversity is known as Eutrophication. (4) If the concentration of dissolved oxygen of water is below 6 ppm, the growth of fish get inhibited. | JEE MAIN-2020 | DATE : 05-09-2020 (SHIFT-1) | PAPER-1 | OFFICIAL PAPER | CHEMISTRY PAGE # 3
💬Ask on WhatsApp →
Still have doubts about this question?
Send it to our AI chemistry tutor on WhatsApp — gets answered in minutes