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MCQs

Total Questions : 1041 | Page 1 of 105 pages
Question 1. Reaction of phosphate rock with 98% H₂SO₄ produces
  1.    Orthophosphoric acid
  2.    Superphosphate
  3.    White phosphorous
  4.    None of these
 Discuss Question
Answer: Option A. -> Orthophosphoric acid
Question 2. Reaction of calcium fluorapatite with sulphuric acid produces
  1.    Ortho-phosphoric acid
  2.    Simple superphosphate
  3.    Triple superphosphate
  4.    Red phosphorous
 Discuss Question
Answer: Option B. -> Simple superphosphate
Question 3. 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
Question 4. Pick out the wrong statement.
  1.    'Green acid' is the other name of phosphoric acid produced by the reaction of phosphate rock & sulphuric acid
  2.    Chemically unreactive nature of red phosphorous is due to its polymeric structure
  3.    Red phosphorous is the most reactive allotropic form of phosphorous
  4.    Red phosphorous, which is used in the manufacture of safety matches, is converted into white phosphorous by vaporisation followed by condensation
 Discuss Question
Answer: Option C. -> Red phosphorous is the most reactive allotropic form of phosphorous
Question 5. Urea is a __________ fertiliser.
  1.    Nitrogenous
  2.    Potassic
  3.    Phosphatic
  4.    None of these
 Discuss Question
Answer: Option A. -> Nitrogenous
Question 6. Which of the following fertilisers is needed for promoting the development of leaves and stems during early stages of plant growth?
  1.    Nitrogeneous fertiliser
  2.    Potassic fertiliser
  3.    Phosphatic fertiliser
  4.    None of these
 Discuss Question
Answer: Option A. -> Nitrogeneous fertiliser
Question 7. __________ 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
Question 8. NPK fertiliser is a __________ fertiliser.
  1.    Complex
  2.    Mixed
  3.    Nitrogenous
  4.    Phosphatic
 Discuss Question
Answer: Option B. -> Mixed
Question 9. In the manufacture of H₃ PO₄ (ortho), ; strong H₂ SO₄ leaching wet process as compared to electric furnace process
  1.    Uses lower grade phosphate rock
  2.    Requires lower capital investment in the plant
  3.    Produces lower purity acid
  4.    Is very costly
 Discuss Question
Answer: Option C. -> Produces lower purity acid
Question 10. Raw materials for urea production are
  1.    CO₂ and N₂
  2.    CO₂, H₂ and N₂
  3.    NH₃ and CO
  4.    HNO₃ and CaCO₃
 Discuss Question
Answer: Option B. -> CO₂, H₂ and N₂

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