71. Lower temperature and large excess of ammonia in urea melt
Increases biuret formation
Decreases biuret formation
Is undersirable
Does not effect biuret formation
✅ The correct answer is option B.
Fertilizer Technology MCQs
72. Urea is formed only
In liquid phase
In vapour phase
At very high temperature
At very low pressure (vacuum)
✅ The correct answer is option A.
73. Excessive use of chemical fertilisers causes shrivelling of the roots and wilting of the plant, because the
Osmotic pressure of the soil water becomes less than that of the plant sap
Soil becomes too alkaline
Osmotic pressure of the soil water becomes higher than that of the plant sap
Soil becomes too acidic
✅ The correct answer is option C.
74. Naphtha in a fertiliser plant is used as a source of
Fuel
H₂
N₂
O₂
✅ The correct answer is option B.
75. Low grade coal is __________ to produce ammonia synthesis gas.
Hydrogenated
Liquefied
Gasified
Dehydrogenated
✅ The correct answer is option C.
76. Urea is a better fertilizer than ammonium sulphate, because
It is cheaper
Nitrogen content is higher
It is not poisonous
It is easy to manufacture
✅ The correct answer is option B.
77. Which of the following does not come under the category of ‘secondary nutrient’ for plant growth?
Calcium
Magnesium
Sulphur
Oxygen
✅ The correct answer is option D.
78. The essential ingradient of all the synthesis gas is
H₂
O₂
CO₂
N₂
✅ The correct answer is option A.
79. During conversion of ammonium carbamate into urea, presence of large excess of water
Increases the yield of urea
Adversely affects the yield of urea
Reduces the evaporator load by diluting the urea solution
Does not affect the yield of urea
✅ The correct answer is option B.
80. Ammonium phosphate is a __________ fertiliser.
Nitrogenous
Phosphatic
Complex
Mixed
✅ The correct answer is option D.