a) 2
b) 3
c) 3
d) 4
The treatment of water with _________ improves the taste of water
a) Oxygen
b) Chlorine
c) KMnO4
d) Ozone
Reacting the water with _________ removes the odour due to the phenols
a) KMnO4
b) MnO4
c) Potassium
d) Magnesium
__________ imparts peculiar odour to the water
a) Decaying organic matter
b) Detergents
c) Phenols
d) Dissolved oxygen
The unpleasant odour of the water is due to presence of the __________
a) Nitrogen
b) Bismuth
c) Phenols
d) Dissolved oxygen
Dried sludge can be used as _________
a) Fertilizer
b) Pesticide
c) Reagent
d) Medicine
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