Fertilizers — Natural and Artificial NDA Questions

NDA Chemistry

Fertilizers — Natural and Artificial MCQ Questions


1.
What are the uses of gypsum?
A.
Soil sterilization
B.
Pest control
C.
pH regulation
D.
Improving soil structure and drainage
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ANSWER :
D. Improving soil structure and drainage
2.
What characterizes organic fertilizers?
A.
They are primarily made from synthetic chemicals.
B.
They are costly due to complex manufacturing processes.
C.
They contain only plant or animal-based materials or those synthesized by microorganisms.
D.
They are exclusively derived from mineral sources.
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ANSWER :
C. They contain only plant or animal-based materials or those synthesized by microorganisms.
3.
Explain the process of manufacturing cement?
A.
By mixing sand and gravel
B.
By extracting it from natural deposits
C.
By heating limestone, clay, and other materials in a kiln
D.
By refining crude oil
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ANSWER :
C. By heating limestone, clay, and other materials in a kiln
4.
Mention any three physical properties of phenol?
A.
Colorless, odorless, and soluble in water
B.
Colorless, acidic, and insoluble in water
C.
Colorless, crystalline solid, and volatile
D.
Colorless, flammable, and non-volatile
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ANSWER :
C. Colorless, crystalline solid, and volatile
5.
What is the primary purpose of fertilizers?
A.
To provide structural support to plants
B.
To control pests and diseases
C.
To enhance soil fertility by adding organic matter
D.
To supply one or more nutrients to the soil
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ANSWER :
D. To supply one or more nutrients to the soil
6.
What is the term for the unintended harmful effects of pesticides on non-target organisms?
A.
Biomagnification
B.
Biodiversity
C.
Pesticide resistance
D.
Pesticide drift
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ANSWER :
D. Pesticide drift