By which treatment of polluted water, salts like nitrates and phosphates are removed?

Give the ill-effects of nitrates and phosphates of fertilizers.

What is the method to treat polluted water?

Name two salt water ecosystem.

Complete the missing links: Secondary treatment for polluted water are _________ and activated sludge method.

The concentration of bivalent lead ions in sample of polluted water that also contains nitrate ions is determined by adding solid sodium sulphate (m=142) to exacty 500mL water 500mL water. Calculate the molarity of kead ion if 0.355g of solium sulphate was needed for complete precipitation of lead ions as sulphate.

The primary treatment of waste water involves the removal of :

Which salt on treatment with soda lime gives ethane?

Why is the sewage water called polluted water?

Discuss the biological treatment of waste water in a STP.