Fertilizer Technology MCQs

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1.Identify the incorrect statement from the following options:

Loamy soil is ideal for healthy plant growth, whereas clayey soil is dense, making root penetration difficult.Excessive use of nitrogen-based fertilizers on soil can lead to health issues like diarrhea and cyanosis.Applying large amounts of potash fertilizers enhances the carotene content in fruits and vegetables.Cereal crops cultivated in alkaline soils tend to absorb more fluoride, contributing to fluorosis.

2.Identify the incorrect statement from the following:

Yellow phosphorus, the most reactive allotrope of phosphorus, is transported underwater.Apatite, chemically represented as Ca10(PO4)6(F, Cl, OH), is the main component of phosphate rock.Ammonium nitrate absorbs moisture more readily than urea does.Nitrogen fixation refers to the conversion of atmospheric nitrogen into nitrogen-containing compounds.

3.Identify the incorrect statement from the following:

The conversion of ammonium carbamate into urea requires heat input.Applying liquid ammonia directly as a fertilizer is appropriate for tropical regions such as India.Gypsum (CaSO4·2H2O) is formed as a secondary product during the wet method of producing ortho-phosphoric acid.Treating phosphate rock with diluted sulfuric acid yields superphosphate fertilizer.

4.Identify the incorrect statement from the following:

Nitrogen in fertilizers is typically provided only as ammoniacal or nitrate forms.Calcium in fertilizers aids in neutralizing acidic soils.An ideal granular fertilizer has a particle size between 10 and 15 mesh and contains less moisture than powdered fertilizers.Ammonium nitrate fertilizer is produced as a secondary product in integrated steel plants with coke ovens.

5.Identify the incorrect statement from the following options:

'Green acid' refers to phosphoric acid formed when phosphate rock reacts with sulfuric acid.The chemical inertness of red phosphorus is attributed to its polymeric arrangement.Red phosphorus is the most chemically reactive allotrope of phosphorus.Red phosphorus, commonly used in safety match production, can be transformed into white phosphorus through vaporization and condensation.

6.Which of the following statements is accurate?

The reaction between ammonia and nitric acid forming ammonium nitrate absorbs heat.Increasing the ammonia to carbon dioxide ratio lowers urea production under fixed temperature, pressure, and feed conditions.Biuret, an intermediate in urea production, is harmful to both plants and animals.Statements B and C are both true.

7.Identify the incorrect statement from the following options:

Not every nitrogenous fertilizer dissolves in water.A straight fertilizer provides only a single nutrient to plants.Calcium cyanamide serves as a herbicide in onion cultivation.Phosphorus strengthens plant stems and promotes branching.

8.What type of reaction is involved in the oxidation of ammonia?

Releases heat (Exothermic)Absorbs heat (Endothermic)Occurs without a catalystCatalyzed by its own products

9.When producing orthophosphoric acid (H3PO4) via the wet process involving strong sulfuric acid leaching, how does it compare to the electric furnace method?

Utilizes phosphate rock of inferior qualityDemands less initial capital expenditure for the facilityYields acid with reduced purity levelsInvolves significantly higher expenses

10.Although liquid ammonia contains 82% nitrogen and can be used as a fertilizer, why is it rarely applied directly as a fertilizer in tropical countries such as India?

It emits a strong, unpleasant odorIt evaporates easily at ambient temperaturesIt is poisonous and highly corrosiveThere is a limited availability of itIt reacts poorly with soil components

Fertilizer Technology MCQs

About this subject

1.Identify the incorrect statement from the following options:

2.Identify the incorrect statement from the following:

3.Identify the incorrect statement from the following:

4.Identify the incorrect statement from the following:

5.Identify the incorrect statement from the following options:

6.Which of the following statements is accurate?

7.Identify the incorrect statement from the following options:

8.What type of reaction is involved in the oxidation of ammonia?

9.When producing orthophosphoric acid (H3PO4) via the wet process involving strong sulfuric acid leaching, how does it compare to the electric furnace method?

10.Although liquid ammonia contains 82% nitrogen and can be used as a fertilizer, why is it rarely applied directly as a fertilizer in tropical countries such as India?

11.What pH range is typically maintained in soil through fertiliser application to ensure optimal plant growth and health?

12.Among the following fertilizers, which one has the lowest nitrogen content?

13.What is the product formed when phosphate rock, coke, and sand are heated together in an electric furnace?

14.Which catalyst is typically employed in the steam reforming process of naphtha?

15.What type of reaction occurs when liquid ammonia reacts with 60% nitric acid to form ammonium nitrate?

16.What process is used to convert low-grade coal into synthesis gas for ammonia production?

17.What is the primary mineral found in phosphate rock?

18.Which substance is commonly utilized as the hydrogen source in gas-based fertilizer manufacturing plants?

19.What is the chemical formula for meta-phosphoric acid?

20.Under Indian conditions, which method of hydrogen production used for ammonia synthesis is the most expensive?

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