Fertilizers — Natural and Artificial NDA Questions

NDA Chemistry

Fertilizers — Natural and Artificial MCQ Questions


13.
Why is the earthworm called the farmer's friend?
A.
Because it eats harmful insects
B.
Because it helps in pollination
C.
Because it aerates and enriches the soil
D.
Because it produces natural fertilizers
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ANSWER :
C. Because it aerates and enriches the soil
14.
Pesticides are primarily used for?
A.
Enhancing soil fertility
B.
Providing structural support to plants
C.
Controlling pests and diseases
D.
Improving water retention in soil
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ANSWER :
C. Controlling pests and diseases
15.
Which of the following are considered the Principal Nutrients essential for plant growth?
A.
Water, Oxygen, Carbon dioxide
B.
Nitrogen, Iron, Calcium
C.
Magnesium, Zinc, Sulfur
D.
Nitrogen, Phosphorus, Potassium
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ANSWER :
D. Nitrogen, Phosphorus, Potassium
16.
What describes inorganic fertilizers?
A.
They are exclusively derived from organic matter.
B.
They are costly due to complex manufacturing processes.
C.
They are solely derived from plant or animal-based materials.
D.
They are prepared by making natural elements undergo chemical changes in factories.
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ANSWER :
D. They are prepared by making natural elements undergo chemical changes in factories.
17.
Why are earthworms considered beneficial to farmers?
A.
They contribute to soil erosion.
B.
They release harmful chemicals into the soil.
C.
They enhance soil fertility by producing compost castings from organic wastes.
D.
They compete with plants for nutrients
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ANSWER :
C. They enhance soil fertility by producing compost castings from organic wastes.
18.
Pyrethrum, a naturally occurring pesticide is derived from ___________
A.
Crocus
B.
Chrysanthemum
C.
Daffodil
D.
Butter cup
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ANSWER :
B. Chrysanthemum