When the pO value of water is 5, then it has

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• The most important source of water for public water supply is
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• The water obtained from a lake is known as surface water.
• In designing a water works for a city to meet the water demand for public use, a provision of about
• The sanitation system in which a small portion of storm water is allowed to enter in the sanitary sewage sewers and the remaining storm water flows in separate set of sewers, is known as
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• In lime soda process, the pH value of treated water is increased.
• When the pH value of water is more than 7, it represents
• When the pH value of water is
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