Fertiliser Technology In an ammonia plant, the purge off is essential to Remove uncondensed ammonia vapour Maintain H₂ : N₂ ratio at 3 :1 Maintain inert gas concentration within a limit Remove excess poisonous gases Remove uncondensed ammonia vapour Maintain H₂ : N₂ ratio at 3 :1 Maintain inert gas concentration within a limit Remove excess poisonous gases ANSWER DOWNLOAD EXAMIANS APP
Fertiliser Technology Dehydration of ammonium carbamate to yield urea is a/an __________ reaction. Catalytic Exothermic Autocatalytic Endothermic Catalytic Exothermic Autocatalytic Endothermic ANSWER DOWNLOAD EXAMIANS APP
Fertiliser Technology 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 Non-spherical prills Low bulk density product Biuret formation Substantially wet non-flowing and sticky product Non-spherical prills Low bulk density product Biuret formation Substantially wet non-flowing and sticky product ANSWER DOWNLOAD EXAMIANS APP
Fertiliser Technology Conversion of yellow phosphorus to red phosphorous is done in retorts at 250-450°C in the Absence of air Presence of an oxidising atmosphere Presence of an inert atmosphere Presence of a reducing atmosphere Absence of air Presence of an oxidising atmosphere Presence of an inert atmosphere Presence of a reducing atmosphere ANSWER DOWNLOAD EXAMIANS APP
Fertiliser Technology Heating of orthophosphoric acid to about 900°C, produces No change in it None of these Metaphosphoric acid Pyrophosphoric acid No change in it None of these Metaphosphoric acid Pyrophosphoric acid ANSWER DOWNLOAD EXAMIANS APP
Fertiliser Technology Electric process as compared to wet process (for the manufacture of phosphoric acid) Is weak acid process Is used less frequently Can use only high grade phosphate rock Produces a valuable by-product called gypsum Is weak acid process Is used less frequently Can use only high grade phosphate rock Produces a valuable by-product called gypsum ANSWER DOWNLOAD EXAMIANS APP
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