Soil Pollution MCQs and Answers for competitive exams

Questions

81 Total soil order found in world?

A 9

B 10

C 11

D 12

View Answer

Answer: 12

82 Organism utilize carbon from CO2 for their cellular synthesis

A Hetrotrophs

B Chemotrophs

C Autotrophs

D None of the above

View Answer

Answer: Autotrophs

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83 Actinomycetes prefer which condition for their growth

A Slightly alkaline

B Alkali

C Acidic

D Neutral

View Answer

Answer: Slightly alkaline

84 Which genera of bacteria found maximum in soil?

A Azotobacter

B Pseudomonas

C Bacillus

D All of the above

View Answer

Answer: 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

View Answer

Answer: All of the above

86 Thermophiles organism lies in temperature

A > 45°C

B > 25°C

C < 45°C

D None of the above

View Answer

Answer: > 45°C

87 N content in thiourea is _________

A 46%

B 36.8%

C 22.5%

D 33%

View Answer

Answer: 36.8%

88 Microorganism involve in conversion from nitrite to nitrate

A Nitrosomonas

B Nitrobactor

C Pseudomonas

D None of the above

View Answer

Answer: Nitrobactor

89 Base saturation in lateritic soil

A < 40 %

B > 40%

C < 20%

D > 20%

View Answer

Answer: > 40%

90 Mica is a type of clay mineral

A 1:1

B 2:1

C 2:1:1

D None of the above

View Answer

Answer: 2:1

91 The central cation on silica tetrahedron is _____

A Al3+

B Si4+

C Fe2+

D None of the above

View Answer

Answer: Si4+

92 pF scale for Field capacity is _____

A 2

B 2.5

C 3.5

D All of the above

View Answer

Answer: 2.5

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