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MCQs

Total Questions : 1041 | Page 11 of 105 pages
Question 101. CaH₄(PO₄)₂ is the chemical formula of
  1.    Superphosphate
  2.    Triple superphosphate
  3.    Calcium phosphate
  4.    Meta phosphoric acid
 Discuss Question
Answer: Option B. -> Triple superphosphate
Question 102. Pick out the wrong statement.
  1.    Loamy soil is the best soil for vigorous plant growth, while the clayey soil is solid and hence the plant roots penetrate with difficulty
  2.    Large excess use of nitrogenous fertiliser in land causes the problem of diarrhoea and cyanosis
  3.    Application of large excess of potassic fertiliser in soil increases the valuable carotene in fruits and vegetables
  4.    Cereal crops grown on alkaline soil absorb higher amount of flourides thereby spreading flourosis
 Discuss Question
Answer: Option C. -> Application of large excess of potassic fertiliser in soil increases the valuable carotene in fruits and vegetables
Question 103. Nitrogen content of urea is about __________ percent.
  1.    10
  2.    46
  3.    80
  4.    94
 Discuss Question
Answer: Option B. -> 46
Question 104. Dehydration of ammonium carbamate to yield urea is a/an __________ reaction.
  1.    Exothermic
  2.    Endothermic
  3.    Autocatalytic
  4.    Catalytic
 Discuss Question
Answer: Option B. -> Endothermic
Question 105. Leaching of phosphate rock by strong __________ acid produces phosphoric acid.
  1.    Sulphuric
  2.    Hydrochloric
  3.    Either A or B
  4.    Neither A nor B
 Discuss Question
Answer: Option C. -> Either A or B
Question 106. Ammonia synthesis reaction is
  1.    Exothermic
  2.    Endothermic
  3.    Autocatalytic
  4.    None of these
 Discuss Question
Answer: Option A. -> Exothermic
Question 107. Electric process as compared to wet process (for the manufacture of phosphoric acid)
  1.    Can use only high grade phosphate rock
  2.    Is used less frequently
  3.    Produces a valuable by-product called gypsum
  4.    Is weak acid process
 Discuss Question
Answer: Option B. -> Is used less frequently
Question 108. Ammonium nitrate is
  1.    Having about 40% N₂
  2.    Not hygroscopic
  3.    Not prone to explosive thermal decomposition
  4.    Mixed with limestone powder to reduce its explosive nature before using it as a fertilizer
 Discuss Question
Answer: Option D. -> Mixed with limestone powder to reduce its explosive nature before using it as a fertilizer
Question 109. Fertiliser plants get their N₂ requirements
  1.    By fractionation of liquified air
  2.    By dissociating oxides of nitrogen
  3.    From coal gas (coke oven gas)
  4.    From producer gas
 Discuss Question
Answer: Option A. -> By fractionation of liquified air
Question 110. Conditioners like finely divided peat are added to the fertiliser to
  1.    Counteract burning
  2.    Avoid caking & hardening
  3.    Produce bulk
  4.    Increase its solubility
 Discuss Question
Answer: Option B. -> Avoid caking & hardening

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