A.
Answer the following:
1. considered to be a micronutrient for plants (needed in only small amounts)?
a. Boron
b. Hydrogen
c. Magnesium
d. sulfur
2. The percentage of nitrogen in urea is_____.
a. 60%
b. 47%
c. 25%
d. 30%
3. The element does not present in fertilizers is______.
a. Phosphorus
b. Chlorine
c. Hydrogen
d. Nitrogen
4.Kieserite is -------------------------
a. magnesium sulphate
b. sodium sulphate
c. Potassium sulphate
d. Sodium nitrate
5. Which of the following is TRUE of inorganic fertilizers?
a. They release nutrients through decomposers
b. They are not synthetically manufactured
c. They release nutrients quickly
d. They release nutrients quickly
6.Which of the following is NOT one of the six essential nutrients plants need?
a. Nitrogen
b. Potassium
c. Phosphorous
d. Radium
7.Which of the following is a synthetic fertilizer?
a. Groundnut cakeb. Castor meal
c. Superphosphate
d. Compost
8.What are the three main elements in plant fertilizers?
a. Calcium, Nitrogen, Potassium
b. Carbon, nitrogen, Oxygen
c. Magnesium, nitrogen, Phosphorus
d. Nitrogen, Phosphorus, Potassium
9. Fruit and vegetable peelings, eggshells, and manure are all examples of what type of
fertilizer?
a. Organic
b. Inorganic
c. Chemical
d. Granulated
10. What is the fertilizer that is usually concentrated and is to be mixed with water?
a. Powder
b. Liquid
c. Granular
d. Organic
11. Which of the following substance should be added to the soil for plant growth?
a. Oxygen
b. Fertilizers
c. Consumers
d. Sugar
12. Which form of fertilizers is designed to be scratched into soil and water soluble?
a. Granular
b. Powered
c. Liquid
d. Foliage
13.Urea, animal tankage and sludge are the examples
of ……………………………………………………………….
a. Inorganic fertilizers
b. Organic fertilizers
c. a) and b)
d. None of them
14.…………………………………… ……………………… Are natural fertilizers that are
microbial, bacteria, algae, and fungi.
a. Fertilizers
b. Bio-fertilizers
c. Primary consumers
d. Consumers
15. Sodium tri poly phosphate (STPP) is chemically represented as
(A) Na5P3O10
(B) Na4P3O8
(C) Na3P4O6
(D) Na2PO4
16.Which of the following does not come under the category of 'micro-nutrient' for plant
growth?
(A) Chlorine
(B) Iron
(C) Boron
(D) Carbon
17. Raw materials for nitric acid manufacture are
(A) Hydrogen peroxide, air and water
(B) Anhydrous ammonia and air
(C) Anhydrous ammonia, air and water
(D) Wet ammonia, air and water
18. Nitrogen content of a nitrogenous fertilizer is 35%. It could be
(A) Urea
(B) Ammonium nitrate
(C) Calcium ammonium nitrate (CAN)
(D) Ammonium sulphate
19.Nitrogen content of urea is about __________ percent.
(A) 10
(B) 46
(C) 80
(D) 94
20. The most suitable fertilizer for accelerating seeding or fruit formation in later stages of
plant growth is __________ fertilizer.
(A) Nitrogenous
(B) Phosphatic
(C) Potassic
(D) None of these
21. With increases in pressure, the conversion of Ammonium carbamate into urea
(A) Increases
(B) Decreases
(C) Remains unaltered
(D) Can either increase or decrease depends on biuret content
22. Triple superphosphate is made by reacting phosphate rock with __________ acid.
(A) Phosphoric
(B) Nitric
(C) Sulphuric
(D) Hydrochloric
23. Raw materials for nitric acid manufacture are___________________?
A. Hydrogen peroxide, air and water
B. Anhydrous ammonia and air
C. Anhydrous ammonia, air and water D.
Wet ammonia, air and water
24.Plant tranquillisers___________________?
A. Hold back stem growth and halt plants at a desired height B.
Cause early maturation of plants
C. Accelerate ripening of food and grain
D. Produce seedless fruit
25.Nitrogen content of a nitrogenous fertiliser is 35%. It could be___________________?
A. Urea
B. Ammonium nitrate
C. Calcium ammonium nitrate (CAN)
D. Ammonium sulphate
26. With increases in pressure, the conversion of Ammonium carbamate into
urea___________________?
A. Increases
B. Decreases
C. Remains unaltered
D. Can either increase or decrease depends on biuret content
27.Nitric acid is produced on commercial scale in a fertiliser plant
by___________________?
A. Oxidation of ammonia B.
CaNO3 + H2SO4 reaction
C. Passing air through high voltage electric arc
D. None of these
28.In ammonia synthesis (N2 + 3H2 = 2NH3), there is a decrease in total volume, hence to
get high equilibrium conversion, the reaction should be carried out at________________?
A. Low pressure
B. High pressure
C. Very high temperature
D. Atmospheric pressure as the pressure has no effect on conversion
29.Reaction of anhydrous liquid ammonia with ortho-phosphoric acid
produces____________________?
A. Ammonium phosphate
B. Superphosphate
C. Triple superphosphate
D. None of these
30 -10-5 fertilisers mean that they contain______________?
A. 5, 10, 5% respectively of N2, P2O5 and K2O
B. Only 5 to 10% active fertiliser constituents
C. 5 to 10% filler & carrier of soil conditioners
D. None of these
31. H4P2O7 is the chemical formula of _____________ phosphoric acid?
A. Pyro
B. Ortho
C. Meta
D. None of these
32. The most suitable fertiliser for accelerating seeding or fruit formation in later stages of
plant growth is _____________ fertiliser?
A. Nitrogenous
B. Phosphatic
C. Potassic
D. None of these
33. Triple superphosphate is made by reacting phosphate rock with _____________ acid?
A. Phosphoric
B. Nitric
C. Sulphuric
D. Hydrochloric
34. Maximum nitrogen percentage is in________________?
A. Ammonium sulphate
B. Calcium ammonium nitrate
C. Urea
D. Liquid ammonia
35. Which of the following is not a measure component necessarily to be present in
fertilisers ?
A. Nitrogen
B. Potassium
C. Phosphorous D. Sulphur
A -Match items in column A with those in column B.
1- Element supplied by fertilizer Example of fertilizers.
(i) Nitrogen (a) Super phosphate
(ii) Phosphorus (b) Potash
(iii) Potassium (c) Urea
2- Gloves should always be worn when handling fertilisers?
A) true B) False
