Q.1
Reaction of __________ acid with phosphate rock produces superphosphates.
Q.2
Which of the following does not come under the category of 'micro-nutrient' for plant growth?
Q.3
pH value of soil is maintained at __________ by the addition of fertiliser for optimum growth and health of the plant.
Q.4
Phosphatic fertilisers
Q.5
Phosphorus vapour comprises of
Q.6
Potassic fertiliser is graded based on its __________ content.
Q.7
Potassic fertilisers
Q.8
Monte catini process is a widely used process for the manufacture of
Q.9
Both white phosphorous as well as red phosphorous
Q.10
C/H ratio (by weight) of naphtha used in nitrogenous fertiliser making is about
Q.11
Pick out the wrong statement.
Q.12
Plant tranquillisers
Q.13
Low grade coal is __________ to produce ammonia synthesis gas.
Q.14
A nitrogenous fertiliser contains 20% N₂. It could be
Q.15
A fertiliser contains 82% N₂. It could be
Q.16
Prilling tower is found in the flowsheet for the manufacture of
Q.17
The most suitable fertiliser for accelerating seeding or fruit formation in later stages of plant growth is __________ fertiliser.
Q.18
Oxidation of ammonia is
Q.19
(CH₃ C₆ H₄)₃ PO₄ is the chemical formula of
Q.20
Dehydration of ammonium carbamate produces
Q.21
Which fertiliser is made (using coke oven gas) in by products plant of an integrated steel plant?
Q.22
The fertiliser plant getting hydrogen by electrolysis of water is situated at
Q.23
In calcium ammonium nitrate (CAN) fertil-ser
Q.24
Sodium tri poly phosphate (STPP) is manufactured by reaction of phosphoric acid with sodium
Q.25
Pick out the wrong statement.
Q.26
Raw materials for nitric acid manufacture are
Q.27
H₃PO₄ is the chemical formula of __________ phosphoric acid.
Q.28
Nitrogenous fertiliser is required
Q.29
A fertiliser plant is classified as a gas based fertiliser plant, when it uses __________ gas as a source of hydrogen for the manufacture of ammonia.
Q.30

Low grade phosphate rock can be used in electrical furnace, because

  • of the better CaO/SiO2 balance for slag formation.
  • CaO content is less.
  • it is cheap.
  • it produces low cost product.
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