Tag: waste and its management
Questions Related to waste and its management
The abiotic factors which cause soil pollution is
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Insect
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Deforestation
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Soil erosion
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Both B and C
Brick kilns is a type of______ pollutants.
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Natural
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Man-made
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Both A and B
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None of these
Vehicular, industries, garbage, brick-kilns are some example of man made pollutants. These pollutants are under human control.
Which of the following has an adverse effect on the soil?
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Increase in microbial content of the soil
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Increase in biodegradable waste
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Increase in agricultural waste
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Both A and B
The harmful change in the colour, texture, and quality of soil due to addition and removal of any material is called soil pollution. Soil pollution reduces the productivity of the soil. There are several pollutants that cause soil pollution. For example, agricultural wastes, radioactive wastes and discarded materials of hospitals etc. The agricultural waste includes pesticides, insecticides, fertilizers, weedicides etc. These are the chemicals that are involved in changing the pH of the soil. For example, repeated use of fertilizers makes the soil acidic which in turn decreases the productivity of the soil. So, the correct option is C.
........... contains fine particles released from the thermal power plant.
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Carbon particles
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Fly ash
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Sewage
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None of the above
What is the effect of soil pollution on health of humans?
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Pollution causes threat to water
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It does not cause threat to humans
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Pollution through the plants is transferred to humans and animals
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It only affects animals
The process of laterization results into
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Degradation of soil
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Formation of humus
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Mineralization of humus
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Formation of soil
Which of the following is used to speed up the rate of degradation of a contaminant?
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Biological augmentation
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Biostimulation
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Biosensor
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None of the above
Biological augmentation or bioaugmentation is the process of addition of bacterial cultures to speed up the rate of degradation of a contaminant. It is also called as biological augmentation.
Which of the following is the source of soil pollution?
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Oil and fuel dumping
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Nuclear wastes
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Coal ash
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All of the above
When the wastes are disposed of in the ground, there is leaching of the chemicals from the waste. This results in the soil pollution and contamination of the groundwater. The oil and fuel, nuclear wastes and the coal ash are dumped by making pits in the ground. This results in the loss of the fertility and quality of the soil.
Which of the following can be used for microbial digestion of certain organic chemicals which causes soil pollution?
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Biosensor
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Bioaugmentation
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Bioremediation
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None of the above
Bioremediation means cleaning of the environment of organic chemicals with the help of microbes, plant and animal species. The organisms involved in bioremediation are of two types, hyperaccumulators and detoxifying. Hyperaccumulators are used in bioprospecting and removal of minerals from wastes. The detoxifying agents metabolize the harmful chemicals through various biochemical reactions.
Soil salinity affects the plant growth by
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Reducing the roots ability to extract water from the soil
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Reducing the rate of flowering
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Reducing the rate of ripening
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None of the above
Soil salinity may be due to the presence of soluble salts in the soil water. This causes salt stress. Due to the presence of salts, the rate of absorption of water is decreased. The absorption of the water with salts may cause cell injury because the water is evaporated as transpiration. There is an accumulation of the salts which may result in cell injury. Hence, the plant will prevent the uptake of salt water and there will be a reduction in the water absorption.