14.2 g `Na_2SO_4` is present in `10^2` kg water. Its concentration in ppm is

When 25 g of Na_(2)SO_(4) is dissolved in 10^(3) Kg of solution, its concentration will be

When 25 g of Na_(2)SO_(4) is dissolved in 10^(3) Kg of solution, its concentration will be

If 11.1 mg of CaCl_2 and 12mg of MgSO_4 are present in 2 litres of water, what is its hardness (in grams of CaCO_3 /ppm)?

Assertion : Soluable fluoride is often added to drinking water to bring its concentration up to 1 ppm. Reason : F^(-) ion concentration above 2 ppm causes brown mottling of teeth.

Assertion : Soluable fluoride is often added to drinking water to bring its concentration up to 1 ppm. Reason : F^(-) ion concentration above 2 ppm causes brown mottling of teeth.