Which of the following affects the ozone concentration in troposphere?
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After sedimentation, the water is next passed through sand filter beads, a process which removes . . . . . . . . bacteria.
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A bacterium useful in bioleaching of metals from low grade ores is
A. Bacillus megaterium
B. Thermus aquaticus
C. Thiobacillus ferrooxidans
D. Rhodopseudomonas capsulatus
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The combination of primary and secondary treatment reduces the original sewage BOD by
A. 30 - 40%
B. 50 - 60%
C. 60 -70%
D. 80 - 90%
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Which of the following industries do not produce hazardous waste?
A. Electroplating
B. Chemical
C. Sugar
D. Pharmaceutical
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Ballast water may be carried on-board by ships to maintain stability and improve manoeuvrability during transit. Introduction of which one of the following is regarded as the major threat in release of untreated ballast water?
A. Pathogenic microbes
B. Terrestrial inputs of pollutants
C. Invasive marine species
D. Algal blooms
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The enteroviruses are the ones most commonly found in sewage, they include
A. Polio virus
B. Coxsackie virus
C. Echo virus
D. All the above
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Which one of the following is not biodegradable?
A. Vegetables
B. Fruits
C. Earthworm
D. Aluminium foil
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Plants suitable for bio monitoring of SO2 pollution are
A. White pine, Moss and Lichens
B. Tobacco, Grapes and Garden bean
C. Apricot, Peach and Gladiolas
D. Tomato and Lettuce
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In colloidal chemical substance, the light undergoes
A. Diffraction
B. Polarization
C. Scattering
D. Total internal reflection
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Four stages viz Initiation, inventory analysis, impact, assessment and improvement assessment are associated with
A. LCA
B. EIA (Environmental Impact Assessment)
C. Environmental Audit
D. EIS (Environmental Impact Statement)
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Richael Carsson in her book Silent Spring has classified as raised concern on
A. Economical and social impacts
B. Deforestation
C. Climate change
D. Impacts of agro-chemicals on ecological functions
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Biodegradable pollutant is
A. Plastic
B. Asbestos
C. Sewage
D. Mercury
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How many sites as potential areas for biosphere reserves have been identified by the national MAB committee for the department of environment?
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According to IPCC, during the 20th century Earth's mean surface temperature has risen by
A. Approx 0.4°C
B. Approx 0.6°C
C. Approx 0.8°C
D. Approx 1.0°C
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When a bottle of fully packed water in plastic bottle is fully frozen, then while opening
A. The empty space develops inside the bottle due to less total volume
B. Due to increased pressure inside the bottle, the bottle cracks
C. Due to increased volume inside the plastic bottle, the bottle cracks
D. Due to both increased pressure and density inside the bottle, the bottle shrinks in size
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Sedimentary component which is produced in situ within the pore space is called
A. Primary
B. Authigenic
C. Allogenic
D. Orogenic
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Chemical weathering of rock material is most effective in which of the following region?
A. Aravallo hills
B. Vidyan hills
C. Ladakh
D. Western Ghats
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Which waste water treatment is an anaerobic process?
A. Primary treatment
B. Secondary treatment
C. Tertiary treatment
D. Sludge treatment
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AGENDA - 21 specifically advocated to devise strategies to
A. Promote economic growth to support increasing human population with adequate environment care
B. Control human population explosion, resources over use and deteriorating environment quality
C. Hat and reverse the effects of environmental degradation to promote sustainable and environmentally sound development
D. Promote economic development and environmental with a view to reduce poverty and faster human welfare
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