Presence of iron and manganese in water causes – McqOptions

MCQOPTIONS

1.	Presence of iron and manganese in water causes
A.	Reduction in its dissolved oxygen content
B.	Discoloration of bathroom fixtures
C.	Temporary hardness
D.	None of these
Answer» C. Temporary hardness

Discussion

No Comment Found

Related MCQs

Very small amount of air pollutants are present in stratosphere also; though most of the atmospheric pollutants are present in the troposphere. Which of the following atmospheric pollutants does not cause the ozone layer depletion in atmosphere at tremendous rate?
'Particulate' air pollutants are finely divided solids and liquids. Which of the following is not a 'particulate'?
Which of the following is the most efficient for removal of very finely divided suspended solids and colloidal matter from the polluted water stream?
Hazardous/polluting chemical industries should have an 'exclusion zone' with a green belt and general public access prohibited around it, covering a radius of ____ metres.
CFC (chloro fluoro carbon) is very highly reactive in causing depletion of ozone layer in the atmosphere. Each atom of chlorine liberated from CFC is capable of decomposing __________ molecules of ozones.
BOD of raw municipal sewage may be in the range of about __________ mg/litre.
COD of raw municipal sewage may be in the range of about __________ mg/litre.
Shouting by a man at his full voice corresponds to a voice level of about __________ decibels.
The amount of chemical coagulant added for treatment of polluted water __________ with increase in temperature of the polluted water to be treated.
__________ content of the phosphate rock is the pollutant of primary interest in a phos-phatic fertiliser plant.