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MCQs

Total Questions : 1041 | Page 5 of 105 pages
Question 41. Maximum stability of white phosphorous is at
  1.    Very high pressure
  2.    Atmospheric pressure
  3.    Room temperature
  4.    >600°C
 Discuss Question
Answer: Option D. -> >600°C
Question 42. Raw materials required for the production of CAN (Calcium ammonium nitrate) is NH₃
  1.    HNO₃ & limestone
  2.    CO₂ & H₂SO₄
  3.    HNO₃ & NH₄Cl
  4.    CO₂ & KNO₃
 Discuss Question
Answer: Option A. -> HNO₃ & limestone
Question 43. Fertilizer plant getting its hydrogen requirement partly from coke oven gas is situated at
  1.    Rourkela (under SAIL)
  2.    Barauni (under HFC)
  3.    Nangal (under NFL)
  4.    Talchar (under FCI)
 Discuss Question
Answer: Option A. -> Rourkela (under SAIL)
Question 44. Main component of bone ash is
  1.    Calcium sulphate
  2.    Calcium phosphate
  3.    Calcium carbonate
  4.    Sodium phosphate
 Discuss Question
Answer: Option B. -> Calcium phosphate
Question 45. NPK means a __________ fertiliser.
  1.    Mixed
  2.    Potassic
  3.    Liquid
  4.    Solid
 Discuss Question
Answer: Option A. -> Mixed
Question 46. Vapor phase reaction of ammonia & nitric acid to produce ammonium nitrate is termed as the __________ process.
  1.    Haber's
  2.    Stengel
  3.    Le-chatlier's
  4.    Du-pont's
 Discuss Question
Answer: Option B. -> Stengel
Question 47. Biuret formation in urea is kept at minimum (< 1 %), because it is
  1.    Corrosive in nature
  2.    Toxic and harmful to some crops
  3.    Helpful in decomposition of urea
  4.    Explosive in nature
 Discuss Question
Answer: Option B. -> Toxic and harmful to some crops
Question 48. Pick out the wrong statement.
  1.    Yellow phosphorous which is the most reactive allotropic form of phosphorous is transported under water
  2.    Apatite is the principal material present in phosphate rock which is chemically Ca₁₀ (PO₄)₆ (F, Cl, OH)
  3.    Urea is more hygroscopic than ammonium nitrate
  4.    Nitrogen fixation means the process of bringing atmospheric nitrogen into combination i.e. into nitrogen compound form
 Discuss Question
Answer: Option C. -> Urea is more hygroscopic than ammonium nitrate
Question 49. Chemical formula of metaphosphoric acid is
  1.    H₃PO₄
  2.    H₄P₂O₇
  3.    HPO₃
  4.    Same as that of pyrophosphoric acid
 Discuss Question
Answer: Option C. -> HPO₃
Question 50. Ammonium sulphate fertiliser is
  1.    The highest concentration nitrogenous fertiliser
  2.    The best fertiliser for paddy
  3.    A basic fertiliser
  4.    A neutral fertiliser
 Discuss Question
Answer: Option B. -> The best fertiliser for paddy

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