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MCQs

Total Questions : 1041 | Page 10 of 105 pages
Question 91. In an ammonia plant, the purge off is essential to
  1.    Maintain inert gas concentration within a limit
  2.    Remove excess poisonous gases
  3.    Maintain H₂ : N₂ ratio at 3 :1
  4.    Remove uncondensed ammonia vapour
 Discuss Question
Answer: Option C. -> Maintain H₂ : N₂ ratio at 3 :1
Question 92. Which of the following is not a measure component necessarily to be present in fertilisers?
  1.    Nitrogen
  2.    Potassium
  3.    Phosphorous
  4.    Sulphur
 Discuss Question
Answer: Option D. -> Sulphur
Question 93. Color of nitric acid is light yellow due to the presence of
  1.    NO
  2.    NO₂
  3.    N₂H₅
  4.    NH₃
 Discuss Question
Answer: Option B. -> NO₂
Question 94. Sodium tri poly phosphate (STPP) is chemically represented as
  1.    Na₅P3O₁₀
  2.    Na₄P3O₈
  3.    Na₃P4O₆
  4.    Na₂PO₄
 Discuss Question
Answer: Option A. -> Na₅P3O₁₀
Question 95. Dehydration of ammonium carbamate (to produce urea) is a/an __________ reaction.
  1.    Reversible
  2.    Catalytic
  3.    Exothermic
  4.    Endothermic
 Discuss Question
Answer: Option D. -> Endothermic
Question 96. Yield of urea can be increased with excess ammonia and higher pressure & temperature, but because of __________ this is normally not done.
  1.    Increased biuret formation
  2.    High corrosion rate
  3.    Increased cost of equipment
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 97. Formation of ammonium carbamate by reaction of NH₃ with CO₂ is a/an __________ reaction.
  1.    Catalytic
  2.    Exothermic
  3.    Endothermic
  4.    Reversible
 Discuss Question
Answer: Option B. -> Exothermic
Question 98. __________ is not a fertiliser.
  1.    Calcium ammonium nitrate
  2.    Ferrous sulphate
  3.    Liquid ammonia
  4.    Ammonium sulphate
 Discuss Question
Answer: Option B. -> Ferrous sulphate
Question 99. Conversion of yellow phosphorous to red phosphorous is done by heating it in covered retorts at __________ °C in absence of air.
  1.    50-80
  2.    250-400
  3.    1000-1200
  4.    800-900
 Discuss Question
Answer: Option B. -> 250-400
Question 100. I argest capacity nitrogenous fertiliser plants (2700 tons of NH₃ per day) (2 Nos) in India are located at
  1.    Thal-Vaishet (under RCF in Maharashtra) and Hazira (under IFFCO in Gujarat)
  2.    Talchar (Orissa) and Ramagundam (A.P.) both under FCI
  3.    Korba (M.P.) and Talchar (Orissa) both under FCI
  4.    Haldia (W.B) and Namrup (Assam) both under HFC
 Discuss Question
Answer: Option A. -> Thal-Vaishet (under RCF in Maharashtra) and Hazira (under IFFCO in Gujarat)

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