Low grade phosphate rock can be used in electrical furnace, because__________________?
(A) Of the better CaO/SiO2 balance for slag formation
(B) CaO content is less
(C) It is cheap
(D) It produces low cost product
Commercial production of hydrogen for the manufacture of nitrogenous fertilisers is done by________________?
(A) Steam reforming of naphtha and cracking of natural gas
(B) Electrolysis of water
(C) Cryogenic separation of hydrogen from coke oven gas
(D) All
Reaction of Cresylic acid with _____________ produces Tricresyl phosphate?
(A) Phosphorous pentoxide
(B) Phosphorous oxychloride
(C) Ammonium phosphate
(D) Calcium phosphate
______________ is the most suitable fertiliser for paddy?
(A) Urea
(B) Ammonium sulphate
(C) Superphosphate
(D) Potassium nitrate
A mixture of phosphate rock ______________ is heated in an electric furnace to produce phosphorous?
(A) Salt & coke
(B) Sand & coke
(C) And coke
(D) And sand
Urea is formed only____________________?
(A) In liquid phase
(B) In vapour phase
(C) At very high temperature
(D) At very low pressure (vacuum)
A fertiliser plant is classified as a gas based fertiliser plant, when it uses ______________ gas as a source of hydrogen for the manufacture of ammonia?
(A) Coke oven
(B) Producer
(C) Natural
(D) Coal
Commercial fertilisers are available mostly in the form of__________________?
(A) Powder
(B) Granules
(C) Lumps
(D) Flakes
Nitrogenous fertiliser is required__________________?
(A) During the early stage of growth to promote development of stem and leaves
(B) For accelerating fruit formation in later stage of growth
(C) To lessen the effect of excessive potash application
(D) None of these