Q. Which sewage contains biodegradable waste such as organic matter? Medical waste Plastic waste Domestic waste Wild waste Answer: Domestic waste
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Q. Who is responsible for the degradation of biodegradable organic matter present in the domestic sewage? Animals Humans Plastic Bacteria and other microbes Answer: Bacteria and other microbes
Q. Which materials are hard to remove from the polluted water? Sand Plastic Solids Dissolved salts Answer: Dissolved salts
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Q. Which materials are easily removed from the polluted water? Liquid Solids Dissolved Nutrients Answer: Solids
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Q. How much percent of impurities are enough to make domestic sewage unfit for humans? 0.1 percent 1 percent 5 percent 10 percent Answer: 0.1 percent
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Q. Which of the following are the dissolved materials present in domestic sewage? Sand Clay Nutrients Bacteria Answer: Nutrients
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Q. Which of the following are the colloidal materials present in domestic sewage? Calcium Sand Ammonia Fecal matter Answer: Fecal matter
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Q. Which of the following are the suspended solids in the domestic sewage? Ammonia Sand Calcium Bacteria Answer: Sand
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Q. When the government of India did pass the Water (Prevention and Control of Pollution) Act? 1999 1974 1896 2010 Answer: 1974
Q. Which of the following metal is a water pollutant and causes sterility in human being? As Mn Mg Hg Answer: Mn
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