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Total Questions : 1041 | Page 3 of 105 pages
Question 21. Commercial production of hydrogen for the manufacture of nitrogeneous fertilisers is done by
  1.    Steam reforming of naphtha and cracking of natural gas
  2.    Electrolysis of water
  3.    Cryogenic separation of hydrogen from coke oven gas
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 22. Which of the following nitrogenous fertilisers has the highest percentage of nitrogen?
  1.    Calcium nitrate
  2.    Calcium ammonium nitrate (CAN)
  3.    Urea
  4.    Ammonium sulphate
 Discuss Question
Answer: Option C. -> Urea
Question 23. CO₂ present in reformed gas (obtained by steam reforming of naphtha) is removed by absorbing in
  1.    Mono-ethanolamine (MEA)
  2.    Slaked lime
  3.    Ammoniacal liquor
  4.    Methyl-Ethyl Ketone (MEK)
 Discuss Question
Answer: Option A. -> Mono-ethanolamine (MEA)
Question 24. Urea is a better fertilizer than ammonium sulphate, because
  1.    It is cheaper
  2.    Nitrogen content is higher
  3.    It is not poisonous
  4.    It is easy to manufacture
 Discuss Question
Answer: Option B. -> Nitrogen content is higher
Question 25. Which is the best fertiliser for paddy?
  1.    Ammonium sulphate
  2.    Nitro-phosphate
  3.    Superphosphate
  4.    Potassium nitrate
 Discuss Question
Answer: Option A. -> Ammonium sulphate
Question 26. Rock phosphate constitutes mainly of
  1.    Fluorapatite
  2.    Di-calcium phosphate
  3.    Mono-calcium phosphate
  4.    Di-ammonium phosphate
 Discuss Question
Answer: Option A. -> Fluorapatite
Question 27. Electric furnace method for production of phosphorous uses phosphate rock
  1.    And phosphoric acid
  2.    And coke
  3.    And sulphuric acid
  4.    Silica and coke
 Discuss Question
Answer: Option D. -> Silica and coke
Question 28. Reaction of orthophosphoric acid with soda ash produces
  1.    Sodium tripolyphosphate (STPP)
  2.    Tricresyl phosphate
  3.    Tributyl phosphate
  4.    Nitrophosphate
 Discuss Question
Answer: Option A. -> Sodium tripolyphosphate (STPP)
Question 29. The composition of fresh feed to the high temperature, high pressure urea autoclave is
  1.    Excess liquid ammonia and liquefied CO₂
  2.    Excess liquid ammonia and compressed CO₂ gas
  3.    Liquid ammonia and excess compressed CO₂
  4.    Compressed ammonia gas and excess compressed CO₂
 Discuss Question
Answer: Option B. -> Excess liquid ammonia and compressed CO₂ gas
Question 30. Pick out the correct statement.
  1.    Reaction of NH₃ with HNO₃ to produce (NH₄)₂NO₃ is endothermic
  2.    With increase in NH₃/CO₂ ratio, urea yield decreases for a given temperature, pressure and total feed rate
  3.    Biuret (an intermediate during urea manufacture) is toxic to seeds and animals
  4.    Both B and C
 Discuss Question
Answer: Option B. -> With increase in NH₃/CO₂ ratio, urea yield decreases for a given temperature, pressure and total feed rate

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