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MCQs 1: Which nutrient in fertiliser makes the plant stems stronger and increases branching ?

Nitrogen Phosphorous Potassium Calcium
Answer Explanation

MCQs 2: 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
Answer Explanation

MCQs 3: A Potassic fertiliser contains 50% K2O. It could be _________________?

Potassium sulphate Potassium chloride A mixture of NaCl + KCl None of these
Answer Explanation

MCQs 4: _____________ is the undesirable by-product produced in the manufacture of urea ?

Ammonium carbonate Biuret Carbon dioxide Ammonium carbamate
Answer Explanation

MCQs 5: Temperature and pressure in urea autoclave is_________________?

120°C and 300 atm 190°C and 200 atm 400°C and 550 atm 200°C and 10 atm
Answer Explanation

MCQs 6: Coal based fertiliser plants at Ramagundam (Andhra Pradesh) and Talcher (Orissa) ?

Use coal for heating purpose Gasify coal to get hydrogen from coal gas Use coal as filler in fertiliser Use coal as conditioner in fertiliser
Answer Explanation

MCQs 7: During conversion of ammonium carbamate into urea, presence of large excess of water______________?

Increases the yield of urea Adversely affects the yield of urea Reduces the evaporator load by diluting the urea solution Does not affect the yield of urea
Answer Explanation

MCQs 8: Excessive use of chemical fertilisers causes shrivelling of the roots and wilting of the plant, because the__________________?

Osmotic pressure of the soil water becomes less than that of the plant sap Soil becomes too alkaline Osmotic pressure of the soil water becomes higher than that of the plant sap Soil becomes too acidic
Answer Explanation

MCQs 9: The essential ingredient of all the synthesis gas is___________________?

H2 O2 CO2 N2
Answer Explanation

MCQs 10: CO2 present in reformed gas (obtained by steam reforming of naphtha) is removed by absorbing in _________________?

Mono-ethanolamine (MEA) Slaked lime Ammoniacal liquor Methyl-Ethyl Ketone (MEK)
Answer Explanation

MCQs 11: P2O5 percentage in the phosphoric acid produced by wet process is about_________________?

10 30 50 70
Answer Explanation

MCQs 12: Catalyst used in Haber’s process for ammonia production is_________________?

Reduced iron oxide Nickel Vanadium pentoxide Silica gel
Answer Explanation

MCQs 13: In the manufacture of urea, the intermediate chemical formed is__________________?

Biuret Ammonium carbamate Ammonium carbonate None of these
Answer Explanation

MCQs 14: Which fertiliser is made (using coke oven gas) in by products plant of an integrated steel plant ?

Urea CAN Ammonium sulphate Superphosphate
Answer Explanation

MCQs 15: Catalyst used in the oxidation of ammonia is ________________?

Platinum-beryllium Platinum-rhodium Cobalt-molybdenum Platinum-molybdenum
Answer Explanation

MCQs 16: H3PO4 is the chemical formula of ______________ phosphoric acid?

Pyro Ortho Meta None of these
Answer Explanation

MCQs 17: Nitrolime is chemically known as____________________?

Calcium nitrate Ammonium nitrate Calcium ammonium nitrate (CAN) None of these
Answer Explanation

MCQs 18: Ammonium phosphate is a _____________ fertiliser?

Nitrogenous Phosphatic Complex Mixed
Answer Explanation

MCQs 19: Reaction of phosphate rock with 98% H2SO4 produces ______________________?

Ortho-phosphoric acid Superphosphate White phosphorous None of these
Answer Explanation

MCQs 20: Reaction of dilute sulphuric acid with phosphate rock produces ____________________?

Phosphoric acid Superphosphate Triple superphosphate Gypsum
Answer Explanation

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