3598. Potassic fertilisers
Are useful during early stage of the plant growth
Stimulate early growth and accelerate seeding
Help in development of starches of potatoes and grain
None of these
✅ The correct answer is option C.
3604. Phosphatic fertiliser is graded based on its __________ content.
P₂O₃
PCl5
P₂O₅
H₃PO₄
✅ The correct answer is option C.
3609. Prilling tower is found in the flowsheet for the manufacture of
Ammonia
Urea
Superphosphate
Triple superphosphate
✅ The correct answer is option B.
3613. Catalyst used in the oxidation of ammonia is
Platinum-beryllium
Platinum-rhodium
Cobalt-molybdenum
Platinum-molybdenum
✅ The correct answer is option B.
3615. Raw materials for nitric acid manufacture are
Hydrogen peroxide, air and water
Anhydrous ammonia and air
Anhydrous ammonia, air and water
Wet ammonia, air and water
✅ The correct answer is option C.
3623. Steam reforming of naphtha produces ammonia synthesis gas. This is a/an __________ process.
Autocatalytic
Endothermic
Exothermic
Non-catalytic
✅ The correct answer is option B.
3628. C/H ratio (by weight) of naphtha used in nitrogenous fertiliser making is about
2
6
13
20
✅ The correct answer is option B.
3633. Which of the following does not come under the category of ‘micro-nutrient’ for plant growth?
Chlorine
Iron
Boron
Carbon
✅ The correct answer is option D.
3599. In the manufacture of orthophosphoric acid by strong H₂SO₄ leaching wet process, keeping the reactor temperature above 100°C, results in the formation of undesriable
CaSO₄ .½H₂O and CaSO₄ crystals
Pyrophosphoric acid
Metaphosphoric acid
All of the above
✅ The correct answer is option A.
3602. Which of the following is not a commercially used feed-stock for the production of ammonia synthesis gas?
Water
Naphtha
Tar
Coal/coke oven gas
✅ The correct answer is option C.