From the following sanitizers which one comes under category of surface active agents?
Tetra phosphate
Teepol
Meta phosphate
None of these
Correct answer is B
No explanation has been provided for this answer.
Temporary hardness of water may be removed by adding
calcium hydroxide
calcium carbonate
calcium chloride
sodium bicarbonate
Correct answer is A
No explanation has been provided for this answer.
Lagoons may be characterized as
anaerobic
facultative
aerated
all of these
Correct answer is D
No explanation has been provided for this answer.
Both temporary and permanent hardness of water can be removed on boiling water with
calcium hydroxide
sodium carbonate
calcium oxide
calcium carbonate
Correct answer is B
No explanation has been provided for this answer.
Permanent hardness of water may be removed by the addition of
lime
soda ash
potassium permagnate
sodium bicarbonate
Correct answer is B
No explanation has been provided for this answer.