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Total Questions : 1041 | Page 7 of 105 pages
Question 61. Main constituent of phosphate rock is
  1.    Ammonium phosphate
  2.    Flour apatite
  3.    Calcium fluoride
  4.    Calcium phosphate
 Discuss Question
Answer: Option B. -> Flour apatite
Question 62. The main constituent of rock phosphate is
  1.    Mono-calcium phosphate
  2.    Di-calcium phosphate
  3.    Fluorspar
  4.    None of these
 Discuss Question
Answer: Option B. -> Di-calcium phosphate
Question 63. The essential ingradient of all the synthesis gas is
  1.    H₂
  2.    O₂
  3.    CO₂
  4.    N₂
 Discuss Question
Answer: Option A. -> H₂
Question 64. In the manufacture of urea, the intermediate chemical formed is
  1.    Biuret
  2.    Ammonium carbamate
  3.    Ammonium carbonate
  4.    None of these
 Discuss Question
Answer: Option B. -> Ammonium carbamate
Question 65. During nitric acid manufacture, catalytic oxidation of ammonia at 800°C in presence of platinum catalyst produces nitrogen oxide. Conversion of NH₃ to NO is about __________ percent.
  1.    38
  2.    68
  3.    82
  4.    98
 Discuss Question
Answer: Option D. -> 98
Question 66. Ammonium nitrate (a fertiliser) is coated with limestone powder to
  1.    Increase its nitrogen content
  2.    Cut down its production cost
  3.    Avoid the risk of explosion
  4.    Add extra nutrient as fertiliser
 Discuss Question
Answer: Option C. -> Avoid the risk of explosion
Question 67. Ammonium sulphate can be produced by reacting gypsum with
  1.    Ammonia
  2.    Ammonium carbonate
  3.    Nitric acid
  4.    None of these
 Discuss Question
Answer: Option B. -> Ammonium carbonate
Question 68. 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
Question 69. Urea (a nitrogeneous fertiliser) is produced from carbon dioxide and
  1.    Nitric acid
  2.    Ammonia
  3.    Ammonium nitrate
  4.    Nitric oxide
 Discuss Question
Answer: Option B. -> Ammonia
Question 70. HPO₃ is the chemical formula of __________ phosphoric acid.
  1.    Pyro
  2.    Ortho
  3.    Meta
  4.    None of these
 Discuss Question
Answer: Option C. -> Meta

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