Calculate the feed flow for a two stage pass for the following data. Recovery: 85℅ Permeate flow: 100 m3/hr

Which of these methods does not remove hardness?

The formation of ferrous sulphide leads to the blackening of water.

What is the quality of Organic content obtained in the effluent by an activated carbon filter?

Above pH 7, ammonia will be in the form of soluble ammonia ions.

Which among the following has the highest percentage of salt rejection?

________ is used in detergents to soften water.

The water flux of RO membranes __ as water viscosity lowers.