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MCQs

Total Questions : 1041 | Page 98 of 105 pages
Question 971. _____________ is the undesirable by-product produced in the manufacture of urea ?
  1.    Ammonium carbonate
  2.    Biuret
  3.    Carbon dioxide
  4.    Ammonium carbamate
 Discuss Question
Answer: Option B. -> Biuret
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 972. Temperature and pressure in urea autoclave is_________________?
  1.    120°C and 300 atm
  2.    190°C and 200 atm
  3.    400°C and 550 atm
  4.    200°C and 10 atm
 Discuss Question
Answer: Option B. -> 190°C and 200 atm
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 973. Which nutrient in fertiliser makes the plant stems stronger and increases branching ?
  1.    Nitrogen
  2.    Phosphorous
  3.    Potassium
  4.    Calcium
 Discuss Question
Answer: Option B. -> Phosphorous
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 974. 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__________________?
  1.    Low bulk density product
  2.    Biuret formation
  3.    Non-spherical prills
  4.    Substantially wet non-flowing and sticky product
 Discuss Question
Answer: Option B. -> Biuret formation
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 975. The essential ingredient of all the synthesis gas is___________________?
  1.    H2
  2.    O2
  3.    CO2
  4.    N2
 Discuss Question
Answer: Option A. -> H2
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 976. 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)
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 977. During conversion of ammonium carbamate into urea, presence of large excess of water______________?
  1.    Increases the yield of urea
  2.    Adversely affects the yield of urea
  3.    Reduces the evaporator load by diluting the urea solution
  4.    Does not affect the yield of urea
 Discuss Question
Answer: Option B. -> Adversely affects the yield of urea
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 978. Excessive use of chemical fertilisers causes shrivelling of the roots and wilting of the plant, because the__________________?
  1.    Osmotic pressure of the soil water becomes less than that of the plant sap
  2.    Soil becomes too alkaline
  3.    Osmotic pressure of the soil water becomes higher than that of the plant sap
  4.    Soil becomes too acidic
 Discuss Question
Answer: Option C. -> Osmotic pressure of the soil water becomes higher than that of the plant sap
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 979. P2O5 percentage in the phosphoric acid produced by wet process is about_________________?
  1.    10
  2.    30
  3.    50
  4.    70
 Discuss Question
Answer: Option B. -> 30
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 980. Catalyst used in the oxidation of ammonia is ________________?
  1.    Platinum-beryllium
  2.    Platinum-rhodium
  3.    Cobalt-molybdenum
  4.    Platinum-molybdenum
 Discuss Question
Answer: Option B. -> Platinum-rhodium
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

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