Tag: management of natural resources
Questions Related to management of natural resources
What are the advantage of gobar gas over conventional utilization?
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More efficient source of energy
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Used as good fertilizer
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Reduces the chances of spreading of pathogens
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All of the above
Best economic method to harvest the solar energy is
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Solar cell
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Energy plantation
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Cultivation of sugar cane then energy obtain by burning it
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Solar cooker
The economics of terrestrial growth of vegetation for its energy content is far more favourable than other more technically sophisticated methods of large-scale solar energy conversion. The most traditional is to use the ability of plants to convert the suns energy into fuel molecules; this is cheap, deployable at scale, and provides the energy in easily storable form, but its not very efficient and so needs a lot of land.
Gobar gas contains mainly
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CH$ _{4}$ + CO$ _{2}$
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CH$ _{4}$ + O$ _{2}$
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CO$ _{2}$ + H$ _{2}$
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CO$ _{2}$ + SO$ _{2}$
Biogas (gobar gas) is primarily methane (CH$ _4$) and carbon dioxide (CO$ _2$) and may have small amounts of hydrogen sulphide (H$ _2$S), moisture and siloxanes.
Biogas consists of
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Carbon monoxide, methane and hydrogen.
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Carbon dioxide, methane and hydrogen.
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Carbon monoxide, ethane and hydrogen.
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Carbon dioxide, ethane and hydrogen.
Biogas consists mostly of methane (CH$ _4$), carbon dioxide (CO$ _2$) and a mix of trace gases including nitrogen, hydrogen sulfide (H$ _2$S), hydrogen and others. Methane is the main constituent (63%) of the biogas. The other major constituent is CO$ _2$ (30%).
There is a high accumulation of garbage in the past recent days in Bangalore. What would you suggest to the government as to how could the garbage be converted into cooking gas by decomposing. Which organism is involved in the process of conversion?
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Klebsiella
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Yeast
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Methanogen
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Clostridium
Bio-gas can be converted into _______.
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Fuel
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Electricity
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Fertilizer
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Both A and B
Material recovery is possible from industrial waste. Organic waste can be used for energy production with various processes such as bio-gas production.
Common energy source in villages is
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Electricity
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Coal
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Biogas
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Wood and animal dung
An inexhaustible non-conventional universal source of energy is
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Wind energy
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Solar energy
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Hydrothermal energy
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Tidal energy
Solar energy is considered to be the non-conventional because it is not derived from the conventional fossil fuels. It is inexhaustible as it will not be used up completely. It will not take much time in regeneration. It is universal as most of the places on earth that sustain a large population get the sunlight. Wind energy is also non-conventional and inexhaustible but it is not available to every area. It can be harnessed in areas that witness a low pressure, like equatorial and tropical areas. Similarly, the tidal energy is available to the coastal areas. Hydrothermal resources are available everywhere but need a heavy economic investment for their usage.
Photovoltaic cells are semiconductors of
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Silicon
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Gallium arsinide
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Cadmium telluride
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All of the above
Photovoltaic cells are used in trapping solar energy. These are made of semiconductors that can lose the electrons when exposed to the sunlight to generate the electric current. The semiconductor material used can be silicon, gallium arsenide, cadmium telluride. Silicon is the most preferred because of its uniform crystalline structure. Cadmium Telluride provides a low-cost alternative that is also highly absorptive of solar energy. Gallium arsenide is used for its resistance to the harmful effects of the radiations. It is generally used for space photovoltaic cells.
Solar energy can be trapped through
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Direct heating
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Thermoelectric conversion
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Photovoltaic conversion
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All of the above
Solar energy can be trapped through the following: