Fertilizers — Natural and Artificial NDA Questions

NDA Chemistry

Fertilizers — Natural and Artificial MCQ Questions


1.
Plants require how many nutrients in total for their normal growth and development?
A.
12 essential nutrients
B.
8 essential nutrients
C.
16 essential nutrients
D.
20 essential nutrients
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ANSWER :
C. 16 essential nutrients
2.
Which source provides carbon, hydrogen and oxygen for plant growth?
A.
Only soil through roots
B.
Air (CO₂ for carbon) and Water (H₂O for hydrogen and oxygen)
C.
Chemical fertilizers dissolved in water
D.
Decomposing organic matter in soil
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ANSWER :
B. Air (CO₂ for carbon) and Water (H₂O for hydrogen and oxygen)
3.
Which of the following is the correct classification of essential macronutrients required by plants?
A.
Only Nitrogen (N), Phosphorus (P) and Potassium (K)
B.
Nitrogen (N), Phosphorus (P), Potassium (K), Calcium (Ca), Magnesium (Mg) and Sulphur (S)
C.
Carbon (C), Hydrogen (H) and Oxygen (O) with Nitrogen
D.
Iron (Fe), Zinc (Zn), Copper (Cu), Boron (B) and Manganese (Mn)
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ANSWER :
B. Nitrogen (N), Phosphorus (P), Potassium (K), Calcium (Ca), Magnesium (Mg) and Sulphur (S)
4.
The role of NITROGEN as a plant nutrient is primarily to:
A.
Promote vegetative growth — it is a component of chlorophyll, amino acids, and proteins; responsible for the green colour of leaves
B.
Activate enzymes and regulate water uptake
C.
Facilitate fruit formation and seed development mainly
D.
Strengthen cell walls and promote root growth
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ANSWER :
A. Promote vegetative growth — it is a component of chlorophyll, amino acids, and proteins; responsible for the green colour of leaves
5.
The role of PHOSPHORUS as a plant nutrient is primarily to:
A.
Give green colour to leaves and promote vegetative growth
B.
Provide structural support to cell walls like calcium
C.
Regulate the opening and closing of stomata
D.
Promote root development, cell division, and is a key component of ATP (energy currency), nucleic acids and cell membranes
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ANSWER :
D. Promote root development, cell division, and is a key component of ATP (energy currency), nucleic acids and cell membranes
6.
The role of POTASSIUM as a plant nutrient is primarily to:
A.
Regulate various physiological processes including stomatal opening, protein synthesis, activation of enzymes, and maintenance of ionic balance and turgor pressure
B.
Form the backbone of amino acids and nucleic acids
C.
Build cell walls of plants
D.
Provide energy for photosynthesis as a component of chlorophyll
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ANSWER :
A. Regulate various physiological processes including stomatal opening, protein synthesis, activation of enzymes, and maintenance of ionic balance and turgor pressure