3771. Rock phosphate used for the production of phosphatic fertiliser is mined at
Amjhor (Jharkhand)
Talchar (Orissa)
Bailladella (M.P.)
Kiriburu (Bihar)
✅ The correct answer is option A.
Chemical Engineering
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3772. Prilling of urea should be accomplished (in a sprayer) just above the melting point of urea with minimum of retention time, otherwise it will result in
Low bulk density product
Biuret formation
Non-spherical prills
Substantially wet non-flowing and sticky product
✅ The correct answer is option B.
3773. Which fertiliser is made (using coke oven gas) in by products plant of an integrated steel plant?
Urea
CAN
Ammonium sulphate
Superphosphate
✅ The correct answer is option C.
3774. The optimum size of the ammonia plant is __________ tons/day.
10
100
1000
1000C
✅ The correct answer is option C.
3775. Nitrogen content of a nitrogenous fertiliser is 35%. It could be
Urea
Ammonium nitrate
Calcium ammonium nitrate (CAN)
Ammonium sulphate
✅ The correct answer is option B.
3776. Nitrogenous fertiliser is required
During the early stage of growth to promote development of stem and leaves
For accelerating fruit formation in later stage of growth
To lessen the effect of excessive potash application
None of these
✅ The correct answer is option A.
3777. Dehydration of ammonium carbamate produces
Urea
Biuret
Ammonia water
None of these
✅ The correct answer is option A.
3778. A nitrogenous fertiliser contains 20% N₂. It could be
Ammonium nitrate
Calcium ammonium nitrate (CAN)
Urea
Ammonium chloride
✅ The correct answer is option B.
3779. __________ catalyst is used in the production of urea from CO₂ and NH₃.
Vanadium pentoxide
No
Alumina
Nickel
✅ The correct answer is option B.
3780. Conversion of yellow phosphorus to red phosphorous is done in retorts at 250-450°C in the
Presence of an inert atmosphere
Presence of a reducing atmosphere
Absence of air
Presence of an oxidising atmosphere
✅ The correct answer is option C.