Soil Pollution MCQs | Soil Pollution Short Questions and Answers

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Questions
41 Soil colloidal particle shows the phenomena
A Plasticity
B Adhesion and cohesion
C Flocculation
D All of the above

Answer: All of the above
42 Which plant is used for indication of permanent wilting point?
A Safflower
B Sunflower
C Marigold
D Both A and C

Answer: Sunflower
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43 Hydrogen bond found in which clay mineral
A Beidelite
B Vermiculite
C Montmorillonite
D Kaolinite

Answer: Kaolinite
44 Immobilization of sulphur occur in soil when C:S ratio is _____
A < 300:1
B > 300:1
C > 400:1
D > 200:1

Answer: > 400:1
45 Denitrification is a process of ______
A Oxidation
B Reduction
C Hydration
D Carbonation

Answer: Reduction
46 Thiourea is type of fertilizer
A Slow release
B Nitrification inhibitors
C Natural nitrification inhibitors
D Artificial nitrification inhibitors

Answer: Artificial nitrification inhibitors
47 Chemical formula of thiourea is _____
A CO(NH2)2
B SC(NH2)2
C HCN
D None of the above

Answer: SC(NH2)2
48 Quantity of soil to be taken for texture analysis
A 10g
B 20g
C 30g
D None of the above

Answer: 20g
49 The K2O content in Illite varied between
A 6 to 10%
B 2 to 4%
C 10 to 15%
D 33%

Answer: 6 to 10%
50 The microorganism lies below < 10°C is called _______
A Mesophiles
B Thermophiles
C None of the above
D Psychrophiles

Answer: Psychrophiles
51 Optimum temperature for mesophile
A 10-20°C
B 20-40°C
C 40-60°C
D 15-20°C

Answer: 20-40°C
52 Which organism derive their energy from oxidation of complex organic compound
A Heterotrophs
B Autotrophs
C Chemotrophs
D Lithotrophs

Answer: Heterotrophs
53 Most of the soil organism is _____
A Psychrophiles
B Thermophiles
C All of the above
D Mesophiles

Answer: Mesophiles
54 Optimum growth of bacteria in soil
A Acidic
B Alkali
C Neutral to slightly alkaline
D Slightly acidic to neutral

Answer: Neutral to slightly alkaline
55 Fungi growth optimum in pH
A 2.5-4.5
B 4.5-6.5
C 6.5-7.5
D 7.5-8.5

Answer: 4.5-6.5
56 Aroma of earthy smell in first shower of monsoon is due to _____
A Actinomycetes
B Bacteria
C Fungi
D None of the above

Answer: Actinomycetes
57 Rhizobium is an _____ organism
A Hetrotrophs anaerobic
B Heterotrophs aerobic
C Autotrophs anaerobic
D Autotrophs aerobic

Answer: Heterotrophs aerobic
58 Nitrification process ceases at pH
A < 5
B < 6
C < 4
D All of the above

Answer: < 5
59 Nitrification rapid in _____ season
A Winter
B Rainy
C Summer
D All of the above

Answer: Summer
60 For mineralization of P optimum ratio of C:N:P should be _____
A 100:10:1
B 50:10:1
C 80:10:1
D 30:10:1

Answer: 100:10:1

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