Urea
CAN
Ammonium sulphate
Superphosphate
✅ The correct answer is option C.
Fertilizer Technology MCQs
122. __________ catalyst is used in the production of urea from CO₂ and NH₃.
Vanadium pentoxide
No
Alumina
Nickel
✅ The correct answer is option B.
123. Dehydration of ammonium carbamate produces
Urea
Biuret
Ammonia water
None of these
✅ The correct answer is option A.
124. The concentration (weight %) of nitric acid produced by the oxidation of ammonia and absorption of nitrogen oxides with water is about __________ percent.
60
30
95
100
✅ The correct answer is option A.
125. Multistage operation (as in the case of catalytic oxidation of SO₂) is not carried out for NH₃ synthesis, because of
Comparatively higher pressure drop
High cost of the high pressure vessel used for the reactor
Higher pumping cost
Chances of entrainment and disturbance of catalyst bed
✅ The correct answer is option B.
126. Bio-fertilisers are cheaper, renewable and pollution free. They improve the __________ of the soil.
Nutrient supply
Texture
Water holding capacity
All of the above
✅ The correct answer is option D.
127. Fertiliser value of a nitrogeneous fertiliser is expressed in terms of its __________ content.
N₂
KNO₃
NO₂
NHO₃
✅ The correct answer is option A.
128. Liquid ammonia is not used as such a fertiliser in tropical countries like India, because
Its N₂ content is very low
It is very costly
It will evaporate on spraying
It is not available
✅ The correct answer is option C.
129. H₄P₂O₇ is the chemical formula of __________ phosphoric acid.
Pyro
Ortho
Meta
None of these
✅ The correct answer is option A.
130. Which is the best fertiliser for paddy?
Ammonium sulphate
Nitro-phosphate
Superphosphate
Potassium nitrate
✅ The correct answer is option A.