This set of Environmental Biotechnology Multiple Choice Questions & Answers (MCQs) focuses on “Management of Other Problem Soils”.
1. Acidic soils can be characterized by _______
a) Low pH
b) High pH
c) Texture
d) Colour
View Answer
Explanation: The property of acidic soils is low pH, high soil shows the alkalinity, texture and colour does not help to determine whether the soil is acidic or not.
2. Which of the following ions is not found in excess in acidic soils?
a) Al
b) Fe
c) Mg
d) Cu
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Explanation: Acidic soils are generally characterized by low pH, hence, certain dissolved ions are found in these soils in excessive amounts like Al, Fe, Cu whereas the soil is deficient in Mg ions.
3. Which of the following ion is not found in acidic soils?
a) Ca
b) Al
c) Fe
d) Cu
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Explanation: Acidic soils are deficient in Ca ions but Al, Fe, Cu are found in excessive amounts in these soils as the acidic soils have a pH range of 1-4 and in the high pH range various metals such as Copper, Aluminum, iron are more metals are found but calcium ion being less available in this pH range is deficient in these soils.
4. Bioconcentration factor is the concentration of a pollutant in a organism compared to that present in the environment.
a) True
b) False
View Answer
Explanation: Bioconcentration factor is a term used to refer to the amount of pollutants from the environment that is concentrated in the organism over a period of time.
5. Which of the following is majorly found in acid sulphate soils?
a) Pyrite
b) Copper
c) Aluminium
d) Magnesium
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Explanation: Major components of acid sulphate soils is pyrite which is basically iron sulphide which is converted into sulphuric acid, Copper, Aluminium and Magnesium are majorly not found in acid sulphate soils.
6. Acidic sulphate soils have pH<4.
a) True
b) False
View Answer
Explanation: Acidic sulfate soils occur naturally in the ecosystem, they have sediments and organic substrates forming under waterlogged conditions and the Acidic sulphate soils are rich in iron sulphides and they generally have a pH<4.
7. Crops that are grown on acidic sulphate soils gets destroyed due to nutrient deficiency caused due to _____________
a) Aluminium toxicity
b) Sodium toxicity
c) Oxygen toxicity
d) Nitrogen toxicity
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Explanation: Crops grown on acidic sulphate soils gets destroyed as a result of Aluminium toxicity in the soil, also, the soil is acidic and crops doesn’t grow well on that, also, nutrient deficiency is the major caused, Sodium toxicity and Oxygen toxicity, Nitrogen toxicity is not found in certain soil conditions.
8. Which of the following substance can be used for soil reclamation?
a) Gypsum
b) Citric acid
c) Phosphoric acid
d) Oxalic acid
View Answer
Explanation: Gypsum is the by product of the certain acids like Citric acid, Phosphoric acid, Oxalic acid which are released from manufacturing industries, whereas, the byproduct I.e. gypsum is used for sodic soil reclamation.
9. Adding FYM to the soil helps in reclamation.
a) True
b) False
View Answer
Explanation: Farm yard Manure when added to the sodic soils, it increases the activity of gypsum and helps to in improving the reclamation of the soil.
10. A period of adaptation is required before microbial degradation of xenobiotics.
a) True
b) False
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Explanation: Xenobiotics or the synthetic organic compounds like herbicides and pesticides can be degraded by micro organisms but a period of adaptation is required before microbial degradation.
11. Sesbania aculeata can be used for soil reclamation of alkali soils.
a) True
b) False
View Answer
Explanation: Soil Reclamation is basically the process of reclaiming the soil’s fertility, minerals, nutrients and moisture content in the soil to make it fit for intensive use again after harvesting period. Alkali soils are very high in pH where Sesbania aculeata is a type of green crop manure which can be used for soil reclamation of alkali soils.
12. Leaching is an important step in saline soil reclamation.
a) True
b) False
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Explanation: Leaching is an important step in saline soil reclamation as it helps to leach out all the salinity from the soil, Soil Reclamation is basically the process of reclaiming the soil’s fertility, minerals, nutrients and moisture content in the soil to make it fit for intensive use again after harvesting period.
13. Which of the following in deficient in saline soils?
a) Nitrogen
b) Sulphur
c) Oxygen
d) Calcium
View Answer
Explanation: Nitrogen is deficient in saline soils due to low organic matter content whereas, Sulphur, Oxygen, Calcium are either present in lower concentrations or present in larger amounts.
14. Lime can be used for soil reclamation.
a) True
b) False
View Answer
Explanation: Lime is usually used for soil reclamation of acidic soils as it helps to improve base saturation and reduce phosphorus fixation.
Sanfoundry Global Education & Learning Series – Environmental Biotechnology.
To practice all areas of Environmental Biotechnology, here is complete set of 1000+ Multiple Choice Questions and Answers.
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