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Free download in PDF Soil Pollution Short Questions and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams. These short solved questions or quizzes are provided by Gkseries.
41
Soil colloidal particle shows the phenomena
[A]
Plasticity
[B]
Adhesion and cohesion
[C]
Flocculation
[D]
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
43
Hydrogen bond found in which clay mineral
[A]
Beidelite
[B]
Vermiculite
[C]
Montmorillonite
[D]
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
45
Denitrification is a process of ______
[A]
Oxidation
[B]
Reduction
[C]
Hydration
[D]
Carbonation
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
48
Quantity of soil to be taken for texture analysis
[A]
10g
[B]
20g
[C]
30g
[D]
None of the above
49
The K2O content in Illite varied between
[A]
6 to 10%
[B]
2 to 4%
[C]
10 to 15%
[D]
33%
50
The microorganism lies below < 10°C is called _______
[A]
Mesophiles
[B]
Thermophiles
[C]
None of the above
[D]
Psychrophiles
51
Optimum temperature for mesophile
[A]
10-20°C
[B]
20-40°C
[C]
40-60°C
[D]
15-20°C
52
Which organism derive their energy from oxidation of complex organic compound
[A]
Heterotrophs
[B]
Autotrophs
[C]
Chemotrophs
[D]
Lithotrophs
53
Most of the soil organism is _____
[A]
Psychrophiles
[B]
Thermophiles
[C]
All of the above
[D]
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
56
Aroma of earthy smell in first shower of monsoon is due to _____
[A]
Actinomycetes
[B]
Bacteria
[C]
Fungi
[D]
None of the above
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
59
Nitrification rapid in _____ season
[A]
Winter
[B]
Rainy
[C]
Summer
[D]
All of the above
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
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