In a coal-fired power plant, electrostatic precipitators are installed to control emission of
SO2
NOX
SPM
SPM
C.
SPM
Electrostatic precipitators are widely used in power plants and these remove the particulate matter.
Which one of the following statements is correct?
Extensive use of chemical fertilizers may lead to eutrophication of nearby water bodies
Both Azotobacter and Rhizobium fix atmospheric nitrogen in root nodules of plants.
Cyanobacteria such as Anabaena and Nostoc are important mobilizers of phosphates and for plant nutrition in soil.
Cyanobacteria such as Anabaena and Nostoc are important mobilizers of phosphates and for plant nutrition in soil.
A.
Extensive use of chemical fertilizers may lead to eutrophication of nearby water bodies
Eutrophication is caused by run off water from fertilized fields suburban lawns, feed lots and detergent rich sewage. It is phenomenon of nutrient enrichment of a water body.
Quercus species are the dominant component in
temperature deciduous forests
alpine forests
scrub forests
tropical rain forests
A.
temperature deciduous forests
Temperate deciduous forests grow in continental climates with summer rainfall and severe winters. They are dominated by broad-leaved deciduous trees like Quercus Virginiana, magnolias, boys and allies as well as such tropical species as Ficus aurea, Lysiloma, Tropical rainforests occupy low altitude zones near the equator where annual rainfall exceeds 80 inch and 90 inch distributed over the year. Thress generally from three storeys scattered very tall emergent trees. Canopy layer and under storey stratum.
Tropical scrub forests develop in areas where moisture relations are intermediate between desert and savanna on one hand and rainforest on other.
Which one of the following is being utilised as a source of biodiesel in the Indian countryside?
betroot
sugarcane
pongamia
pongamia
D.
pongamia
Some plants accumulate hydrocarbons in the form of latex e.g. Euphorbia, Asclepias, Capaifera.
In which one of the following the BOD (Biochemical Oxygen Demand ) of sewage (s), distillery effluent (DE), paper mill effluent (PE) and sugar mill effluent (SE) have been arranged in ascending order?
SE < S < PE < DE
SE < PE < S < DE
PE < S < SE < DE
PE < S < SE < DE
D.
PE < S < SE < DE
The ascending order of BOD is sugar mill effulent> paper mill effulent> Distillery effluent> Sewage.
Switch
