131. Which one of the following is used as a nitrogenous fertiliser, as a weed killer in the onion fields and for correcting acidic soils?
Urea
CAN
Ammonium sulphate
Calcium cyanamide
✅ The correct answer is option D.
Fertilizer Technology MCQs
132. H₃PO₄ is the chemical formula of __________ phosphoric acid.
Pyro
Ortho
Meta
None of these
✅ The correct answer is option B.
133. Base suspension fertiliser essentially contains
13% N₂ and 43% P₂O₅
43% N₂ and 13% P₂O₅
43% N₂ and 13% K₂O
43% K₂O and 43% P₂O₅
✅ The correct answer is option A.
134. Reaction of orthophosphoric acid with phosphate rock produces
Superphosphate
Triple superphosphate
Metaphosphoric acid
Monoammonium phosphate
✅ The correct answer is option B.
135. 5-10-5 fertilisers mean that they contain
5, 10, 5% respectively of N₂, P₂O₅ and K₂O
Only 5 to 10% active fertiliser constituents
5 to 10% filler & carrier of soil conditioners
None of these
✅ The correct answer is option A.
136. Heating a mixture of phosphate rock, coke and sand in an electric furnace produces
Phosphoric acid
Ammonium phosphate
Phosphorous
Superphosphate
✅ The correct answer is option C.
137. Though kinetics of ammonia synthesis dictates the use of low temperature for high equilibrium conversion, yet it is kept moderately high (550°C), because at low temperature
Rate of reaction is very low
Very high pressure is required resulting in costly pressure vessel
Space velocity of gas is very low resulting in decreased conversion
None of these
✅ The correct answer is option A.
138. Which of the following fertilisers is needed for promoting the development of leaves and stems during early stages of plant growth?
Nitrogeneous fertiliser
Potassic fertiliser
Phosphatic fertiliser
None of these
✅ The correct answer is option A.
139. Ammonium nitrate (a fertiliser) is coated with limestone powder to
Increase its nitrogen content
Cut down its production cost
Avoid the risk of explosion
Add extra nutrient as fertiliser
✅ The correct answer is option C.
140. P₂O₅ content in triple superphosphate is about __________ percent.
42-50
15-20
85-90
70-75
✅ The correct answer is option A.