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MCQs

Total Questions : 1041 | Page 13 of 105 pages
Question 121. A phosphatic fertiliser contains 16% P₂O₅. It could be
  1.    Dicalcium phosphate
  2.    Superphosphate
  3.    Triple superphosphate
  4.    None of these
 Discuss Question
Answer: Option B. -> Superphosphate
Question 122. Though liquid ammonia itself is a fertiliser (with 82% nitrogen content) yet it is commonly not used as such in a tropical country like India, because it
  1.    Has a pungent smell
  2.    Vaporises at normal temperature
  3.    Is toxic and highly corrosive
  4.    Is in short supply
 Discuss Question
Answer: Option B. -> Vaporises at normal temperature
Question 123. Catalytic ammonia synthesis reaction as in Haber's process is
  1.    Endothermic
  2.    Exothermic
  3.    Irreversible
  4.    None of these
 Discuss Question
Answer: Option B. -> Exothermic
Question 124. In ammonia synthesis (N₂ + 3H₂ = 2NH₃), there is a decrease in total volume, hence to get high equilibrium conversion, the reaction should be carried out at
  1.    Low pressure
  2.    High pressure
  3.    Very high temperature
  4.    Atmospheric pressure; as the pressure has no effect on conversion
 Discuss Question
Answer: Option B. -> High pressure
Question 125. Which of the following is the costliest source of hydrogen needed for ammonia manufacture under Indian condition?
  1.    Electrolysis of water
  2.    Cryogenic removal of H₂ from coke oven gas
  3.    Steam reforming of naphtha
  4.    Natural gas cracking
 Discuss Question
Answer: Option A. -> Electrolysis of water
Question 126. Promoter used in NH₃ synthesis catalyst is
  1.    K₂O
  2.    SiO₃
  3.    V₂O₅
  4.    U₂O₃
 Discuss Question
Answer: Option C. -> V₂O₅
Question 127. Triple superphosphate which contains about 46% P₂O₅ is produced by the reaction of phosphate rock with ortho phosphoric acid of____percent concentration.
  1.    25-28
  2.    52-54
  3.    75-80
  4.    > 98
 Discuss Question
Answer: Option B. -> 52-54
Question 128. Reaction of dilute sulphuric acid with phosphate rock produces
  1.    Phosphoric acid
  2.    Superphosphate
  3.    Triple superphosphate
  4.    Gypsum
 Discuss Question
Answer: Option A. -> Phosphoric acid
Question 129. Reaction of orthophosphoric acid with phosphate rock produces
  1.    Superphosphate
  2.    Triple superphosphate
  3.    Metaphosphoric acid
  4.    Monoammonium phosphate
 Discuss Question
Answer: Option B. -> Triple superphosphate
Question 130. Reaction of nitric acid and sulphuric acid with phosphate rock produces
  1.    Nitrophosphate
  2.    Diammonium phosphate
  3.    Tricresyl phosphate
  4.    Tributyl phosphate
 Discuss Question
Answer: Option A. -> Nitrophosphate

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