Q. Polluted water can be purified by using Micro-organismsAlgaePesticidesFishes Answer: Micro-organisms

Q. B.O.D. test or biological oxygen demand test is made for measuring Air pollution(b)Water pollutionNoise pollutionSoil pollution Answer: Water pollution

Q. Which of the following is biodegradable pollutant? SewagePlasticPolytheneDDT Answer: Sewage

Q. The most common indicator organisms that represent polluted waters is E. ColiS. TyphiC. VibrioEntamoeba Answer: E. Coli

Q. One of the following is the chief source of water and soil pollution Agro industryMiningThermal power stationsAll of these Answer: All of these

Q. What is the groundwater stored at places between the layers of hard rock below water table called? Water cycleWater tableGround waterAquifer Answer: Aquifer

Q. High coliform count in water is an indicator of Industrial pollutionSewage contaminationHardness of waterOil pollution Answer: Sewage contamination

Q. The high amount of E. coli in water is the indicator of Hardness of waterIndustrial pollutionSewage pollutionPresence of chlorine in water Answer: Sewage pollution

Q. __ is used to check water pollution caused by industrial affluents Water HyacinthPartheniumElephant GrassAll of these Answer: Water Hyacinth

Q. The amount of dissolved solids passing through the filters in the process of filtration is called __________. Independent of suspended solidsSum of total solids and suspended solidsDifference between total solids and suspended solidsAll of the above Answer: Difference between total solids ...

Q. Which of the following is not a waterborne disease? MeaslesTyphoidCholeraHepatitis Answer: Measles.

Q. Which of the following diseases or infections is caused due to poor water hygiene? LeprosyTrachomaConjunctivitisAll of the above Answer: All of the above.