Related Questions

Which of the following aquatic plant is effective in preventing the water-pollution caused by industrial waste?
A Water Hyacinth
B Elephant Grass
C Parthenium
D B and C
Air pollution caused by industrial fumes "has" been studied for years, "but " only recently "has" the harmful effects of noise pollution "become" known.
A 1
B 2
C 3
D 4
the weeds that I should do something about" means
A the graden should be cleared off weeds
B the weeds have to be watered
C the weeds should be pruned
D the weeds should be looked be looked after
Sea weeds are important source of
A Fluorine
B Chlorine
C Bromine
D Iodine
Sea weeds are an important source of
A Fluorine
B Chlorine
C Bromine
D Iodine
Some people in Manipur live in houses bunt on floating islands of weeds and decaying vegetation held together by suspended slit. These islands are called
A Tipis
B Barkhans
C Phoomdis
D Izba
The most effective method of controlling S.I. engine exhaust emission is by
A Recirculating exhaust
B Using catalytic converter
C Using some additives in the fuel
D None of these
Which of the following processes is involved in the biochemical treatment of sewage effluents?
A Oxidation
B Reduction
C Dehydration
D Fermentation
The biochemical treatment of sewage effluents is essentially a process of
A Oxidation
B Dehydration
C Reduction
D Alkalinization
The biochemical treatment applied to sewage effluents is a process of
A Dehydration
B Reduction
C Oxidation
D Polymerisation

Next steps