81. Which of the following is a natural inorganic fertiliser?
Chile salt petre
Oilcake
Gobar mannure
None of these
✅ The correct answer is option A.
Fertilizer Technology MCQs
82. Steam reforming of naphtha is a source of hydrogen production for nitrogeneous fertiliser industry. What is the usual ratio of steam to carbon maintained in the process of steam reforming of naphtha?
1.5:1
3.5:1
10:01
15:01
✅ The correct answer is option B.
83. Potassic fertilisers do not promote the development of
Stems & leaves during early stage of plant growth
Starches of potatoes & grains
Sugar of fruits & vegetables
Fibrous materials of plants
✅ The correct answer is option A.
84. Chemical formula of metaphosphoric acid is
H₃PO₄
H₄P₂O₇
HPO₃
Same as that of pyrophosphoric acid
✅ The correct answer is option C.
85. Which nutrient in fertiliser makes the plant stems stronger and increases branching?
Nitrogen
Phosphorous
Potassium
Calcium
✅ The correct answer is option B.
86. __________ is the undesirable by-product produced in the manufacture of urea.
Ammonium carbonate
Biuret
Carbon dioxide
Ammonium carbamate
✅ The correct answer is option B.
87. In the manufacture of H₃ PO₄ (ortho), ; strong H₂ SO₄ leaching wet process as compared to electric furnace process
Uses lower grade phosphate rock
Requires lower capital investment in the plant
Produces lower purity acid
Is very costly
✅ The correct answer is option C.
88. Phosphatic fertilisers
Are useful during early stage of the plant growth
Accelerate fruit formation in later stages of growth
Lessen the effect of excessive nitrogen application
None of these
✅ The correct answer is option B.
89. Electric furnace method for production of phosphorous uses phosphate rock
And phosphoric acid
And coke
And sulphuric acid
Silica and coke
✅ The correct answer is option D.
90. Oxidation of ammonia is
Exothermic
Endothermic
Non-catalytic
Autocatalytic
✅ The correct answer is option A.