গ) 5 to 10% filler & carrier of soil conditioners.
ঘ) none of these.
০২। A fertiliser contains 82% N2. It could be
ক) urea
খ) liquid NH3
গ) ammonium nitrate
ঘ) none of these
০৩। 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.
ক) coke oven
খ) producer
গ) natural
ঘ) coal
০৪। A mixture of phosphate rock __________ is heated in an electric furnace to produce phosphorous.
ক) salt & coke
খ) sand & coke
গ) and coke
ঘ) and sand
০৫। A nitrogenous fertiliser contains 20% N2. It could be
ক) ammonium nitrate.
খ) calcium ammonium nitrate (CAN).
গ) urea.
ঘ) ammonium chloride.
০৬। A phosphatic fertiliser contains 16% P2O5. It could be
ক) dicalcium phosphate
খ) superphosphate
গ) triple superphosphate
ঘ) none of these
০৭। A potassic fertiliser contains 50% K2O. It could be
ক) potassium sulphate.
খ) potassium chloride.
গ) a mixture of NaCl+ KCl.
ঘ) none of these.
০৮। Action of phosphoric acid on rock phosphate produces
ক) superphosphate
খ) triple superphosphate
গ) nitrophosphate
ঘ) diammonium phosphate
০৯। Ammonia synthesis gas is produced from fuel oil by
ক) steam reforming
খ) hydrocracking
গ) partial oxidation
ঘ) hydrogenation
১০। Ammonia synthesis gas is produced from natural gas by
ক) thermal cracking
খ) steam reforming
গ) partial oxidation
ঘ) hydrogenation
১১। Ammonia synthesis reaction is
ক) exothermic
খ) endothermic
গ) autocatalytic
ঘ) none of these
১২। Ammonium nitrate (a fertiliser) is coated with limestone powder to
ক) increase its nitrogen content.
খ) cut down its production cost.
গ) avoid the risk of explosion.
ঘ) add extra nutrient as fertiliser.
১৩। Ammonium nitrate (is mixed with limestone) is not used as fertiliser as such, because
ক) it is hygroscopic and explosive in nature.
খ) it is highly acidic in nature.
গ) it is a liquid at room temperature.
ঘ) its nitrogen content is very less.
১৪। Ammonium nitrate is
ক) having about 40% N2.
খ) not hygroscopic.
গ) not prone to explosive thermal decomposition.
ঘ) mixed with limestone powder to reduce its explosive nature before using it as a fertilizer.
১৫। Ammonium phosphate is a __________ fertiliser.
ক) nitrogenous
খ) phosphatic
গ) complex
ঘ) mixed
১৬। Ammonium sulphate can be produced by reacting gypsum with
ক) ammonia
খ) ammonium carbonate
গ) nitric acid
ঘ) none of these
১৭। Ammonium sulphate fertiliser is
ক) the highest concentration nitrogenous fertiliser.
খ) the best fertiliser for paddy.
গ) a basic fertiliser.
ঘ) a neutral fertiliser.
১৮। An increase in the NH3/CO2 ratio in urea manufacture results in
ক) increased degree of conversion of CO2 to urea.
খ) decreased degree of conversion of NH3 to urea.
গ) decreased yield of urea.
ঘ) decreased specific volume of molten mass.
১৯। Base suspension fertiliser essentially contains