3687. NPK fertiliser is a __________ fertiliser.
Complex
Mixed
Nitrogenous
Phosphatic
✅ The correct answer is option B.
3692. Maximum nitrogen percentage is in
Ammonium sulphate
Calcium ammonium nitrate
Urea
Liquid ammonia
✅ The correct answer is option D.
3697. Catalyst used in ammonia synthesis uses __________ as a promoter.
Pt
K₂O
Al2O₃
Ni
✅ The correct answer is option B.
3701. Nitric acid is produced on commercial scale in a fertiliser plant by
Oxidation of ammonia
CaNO₃ + H₂SO₄ reaction
Passing air through high voltage electric arc
None of these
✅ The correct answer is option A.
3703. Which of the following does not come under the category of’primary nutrient’ for plant growth?
Potassium
Nitrogen
Phosphorous
Sulphur
✅ The correct answer is option D.
3707. Reaction of orthophosphoric acid with soda ash produces
Sodium tripolyphosphate (STPP)
Tricresyl phosphate
Tributyl phosphate
Nitrophosphate
✅ The correct answer is option A.
3671. 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.
3676. Low grade coal is __________ to produce ammonia synthesis gas.
Hydrogenated
Liquefied
Gasified
Dehydrogenated
✅ The correct answer is option C.
3680. The essential ingradient of all the synthesis gas is
H₂
O₂
CO₂
N₂
✅ The correct answer is option A.
3685. Which of the following is a natural inorganic fertiliser?
Chile salt petre
Oilcake
Gobar mannure
None of these
✅ The correct answer is option A.