Q421
Open questionThe water pollution in river is measured by the dissolved amount of
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Q422
Open questionUltraviolet rays can be used in water treatment as
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Q423
Open questionTar roads get damaged if there is
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Q424
Open questionAerated water contains
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Q425
Open questionThe BOD values of water indicate the
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Q426
Open questionIron and manganese present as pollutants in water cannot be removed by________
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Q427
Open questionTable salt gets moist during rainy season because
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Q428
Open questionThe unit to measure the flow of water is
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Q429
Open questionWhen water itself combines chemically with some element or mineral it is called
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Q430
Open questionSea water is saltier than rain water because
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Q431
Open questionIn sugar solution,
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Q432
Open questionThe metallic constituents of hard water are :
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Q433
Open questionPotassium Permanganate is used for purifying drinking water, because________
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Q434
Open questionLead in water can cause
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Q435
Open questionHardness of the water is commonly measured in terms of
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Q436
Open questionMaximum permissible concentration of copper in drinking water in mg/L is
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Q437
Open questionThe amount of chlorine available in water after disinfection is called as
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Q438
Open questionMaximum permissible concentration of total hardness in drinking water is
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Q439
Open questionWhich one of the following is extensively used for sterilizing water ?
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Q440
Open questionAssertion (A) : Synthetic detergents can lather when in hard water.
Reason (R) : Synthetic detergents form soluble calcium and magnesium salts with hard water.
Reason (R) : Synthetic detergents form soluble calcium and magnesium salts with hard water.
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