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Free download in PDF Soil Pollution MCQs 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.
81
Total soil order found in world?
[A]
9
[B]
10
[C]
11
[D]
12
82
Organism utilize carbon from CO2 for their cellular synthesis
[A]
Hetrotrophs
[B]
Chemotrophs
[C]
Autotrophs
[D]
None of the above
83
Actinomycetes prefer which condition for their growth
[A]
Slightly alkaline
[B]
Alkali
[C]
Acidic
[D]
Neutral
Answer: Slightly alkaline
84
Which genera of bacteria found maximum in soil?
[A]
Azotobacter
[B]
Pseudomonas
[C]
Bacillus
[D]
All of the above
85
Which nutrient influence the nodule formation and nitrogen fixation in soil?
[A]
pH
[B]
N
[C]
P
[D]
All of the above
86
Thermophiles organism lies in temperature
[A]
> 45°C
[B]
> 25°C
[C]
< 45°C
[D]
None of the above
87
N content in thiourea is _________
[A]
46%
[B]
36.8%
[C]
22.5%
[D]
33%
88
Microorganism involve in conversion from nitrite to nitrate
[A]
Nitrosomonas
[B]
Nitrobactor
[C]
Pseudomonas
[D]
None of the above
89
Base saturation in lateritic soil
[A]
< 40 %
[B]
> 40%
[C]
< 20%
[D]
> 20%
90
Mica is a type of clay mineral
[A]
1:1
[B]
2:1
[C]
2:1:1
[D]
None of the above
91
The central cation on silica tetrahedron is _____
[A]
Al3+
[B]
Si4+
[C]
Fe2+
[D]
None of the above
92
pF scale for Field capacity is _____
[A]
2
[B]
2.5
[C]
3.5
[D]
All of the above
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