Permanent hard water may be softened by passing it throug...
Permanent hard water may be softened by passing it through
sodium silicate
sodium bicarbonate
sodium hexametaphosphate
sodium phosphate
Correct answer is C
No explanation has been provided for this answer.
From the following sanitizers which one comes under category of surface active agents? ...
The methods used for biological treatment are ...
Discoloration can be achieved by using ...
Sedimentation is a physical process used in wastewater treatment to ...
Temporary hardness of water is caused by the presence of ...
Inhibitors are used along with sanitizer to ...
Enzymes act as antimicrobials ...
The activated sludge process is sometimes referred as ...
The activated sludge process consists of returning a portion of the clarifier ...