Which of the following nitrogenous fertilisers has the highest percentage of nitrogen ?
(A) Calcium nitrate
(B) Calcium ammonium nitrate (CAN)
(C) Urea
(D) Ammonium sulphate
Superphosphate is manufactured by reacting phosphate rock with_____________________?
(A) Acetic acid
(B) Sulphuric acid
(C) Aluminium chloride
(D) None of these
In an ammonia plant, the purge off is essential to___________________?
(A) Maintain inert gas concentration within a limit
(B) Remove excess poisonous gases
(C) Maintain H2 : N2 ratio at 3 :1
(D) Remove uncondensed ammonia vapour
Ammonia synthesis gas is produced from natural gas by___________________?
(A) Thermal cracking
(B) Steam reforming
(C) Partial oxidation
(D) Hydrogenation
Chemical formula of biuret is_________________?
(A) NH2.CO.NH2
(B) NH3.COO.NH3
(C) NH2CONHCONH2
(D) NH4COONH2
Heating of ortho-phosphoric acid to 250°C produces___________________?
(A) Meta-phosphoric acid
(B) Pyrophosphoric acid
(C) No change in it
(D) None of these
Potassic fertilisers do not promote the development of ______________________?
(A) Stems & leaves during early stage of plant growth
(B) Starches of potatoes & grains
(C) Sugar of fruits & vegetables
(D) Fibrous materials of plants
Nitrogen content in ammonium sulphate (a fertiliser) is around ______________ percent?
(A) 5
(B) 20
(C) 50
(D) 65
Dehydration of ammonium carbamate to yield urea is a/an __________________ reaction?
(A) Exothermic
(B) Endothermic
(C) Autocatalytic
(D) Catalytic
Both white phosphorous as well as red phosphorous_________________?
(A) Are soluble in CS2
(B) Burns when heated in air
(C) Reacts with hot caustic soda solution to give Phosphine
(D) All