Q. Which is chief source of nitrogenous matter urea ?

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Q. Phosphorous, is needed for the

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Q. Primary treatment reduces bacterial load, ranges from

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Q. Cyanides are toxic to all biological life, prevents enzyme action, as well as immobilize the

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Q. What reduces water quality ?

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Q. Low 'pH' of a sewage indicates its

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Q. Soil, sand and other solids are washed into water bodies due to

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Q. Which bacteria flourish in absence of free dissolved oxygen in sewage?

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Q. 'Polychlorinated biphenyls' cause harm to

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Q. An example of industrial effluent toxic substance is

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Q. What involved in wastewater final treatment ?

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Q. What affect does Ph have on enzyme ?

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Q. Method by which a dissolved oxygen is determined, known as

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Q. Organic pollutants are discharged as a municipal sewage and

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Q. Organic solids consists of carbohydrates, fats and

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Q. Water pollution due to tailing from ore washing and Sinert suspended solids, known as

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Q. What causes PCBs and dioxins ?

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Q. What chemicals are used in loading, transit and accidental leakage from industrial storage ?

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Q. In humans, nitrates causes blood disease and

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Q. Solubility of oxygen in water is inversely proportional to

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