chemical engineering fertilizer technology MCQs – Page 3

Practise multiple-choice questions from chemical engineering fertilizer technology for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

chemical engineering fertilizer technology Mcqs

41. Conversion of yellow phosphorus to red phosphorous is done in retorts at 250-450C in the ___________________?
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A. Absence of air

B. Presence of an inert atmosphere

C. Presence of an oxidising atmosphere

D. Presence of a reducing atmosphere

42. Calcium ammonium nitrate (CAN) is__________________?
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A. Not a fertiliser; it is an explosive

B. A mixed fertiliser

C. A complex fertiliser

D. A straight fertiliser

43. In natural gas, the C/H ratio (by weight) varies in the range of_________________?
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A. 3-4

B. 10-Aug

C. 20-25

D. 15-17

44. Fusion zone in the electric furnace used for reduction of phosphate rock to elemental phosphorous is maintained at ______________ C?
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A. 250-300

B. 950-1050

C. 1400-1450

D. 500-750

45. Phosphatic fertilisers_________________?
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A. Are useful during early stage of the plant growth

B. None of these

C. Lessen the effect of excessive nitrogen application

D. Accelerate fruit formation in later stages of growth

46. In calcium ammonium nitrate (CAN) fertiliser ____________________?
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A. None of these

B. Nitrate nitrogen is slower acting

C. Nitrate nitrogen is quick acting

D. Ammoniacal nitrogen is quick acting

47. CO2 present in reformed gas (obtained by steam reforming of naphtha) is removed by absorbing in _________________?
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A. Ammoniacal liquor

B. Methyl-Ethyl Ketone (MEK)

C. Mono-ethanolamine (MEA)

D. Slaked lime

48. Urea (a nitrogenous fertiliser) is produced from carbon dioxide and__________________?
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A. Ammonium nitrate

B. Nitric oxide

C. Ammonia

D. Nitric acid

49. Dehydration of ammonium carbamate (to produce urea) is a/an _____________ reaction?
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A. Endothermic

B. Catalytic

C. Reversible

D. Exothermic

50. Raw materials for nitric acid manufacture are___________________?
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A. Anhydrous ammonia, air and water

B. Wet ammonia, air and water

C. Anhydrous ammonia and air

D. Hydrogen peroxide, air and water

51. (CH3 C6 H4)3 PO4 is the chemical formula of__________________?
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A. Fluorapatite

B. Superphosphate

C. Tricresyl phosphate

D. Triple superphosphate

52. Reaction of Cresylic acid with _____________ produces Tricresyl phosphate?
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A. Phosphorous oxychloride

B. Calcium phosphate

C. Ammonium phosphate

D. Phosphorous pentoxide

53. Low grade phosphate rock can be used in electrical furnace, because__________________?
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A. It is cheap

B. CaO content is less

C. It produces low cost product

D. Of the better CaO/SiO2 balance for slag formation

54. Montecatini process is a widely used process for the manufacture of ___________________?
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A. Calcium ammonium nitrate

B. Triple superphosphate

C. Urea

D. None of these

55. Reaction of nitric acid and sulphuric acid with phosphate rock produces_________________?
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A. Diammonium phosphate

B. Nitrophosphate

C. Tricresyl phosphate

D. Tributyl phosphate

56. Steam reforming of naphtha produces ammonia synthesis gas. This is a/an ____________ process?
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A. Non-catalytic

B. Autocatalytic

C. Endothermic

D. Exothermic

57. Phosphoric acid is produced in wet process from phosphate rock and____________________?
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A. Concentrated HCl

B. Concentrated NHO3

C. Concentrated H2SO4

D. Dilute H2SO4

58. Which of the following is not a measure component necessarily to be present in fertilisers ?
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A. Nitrogen

B. Sulphur

C. Potassium

D. Phosphorous

59. Out of the following, N2 content is minimum in_____________________?
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A. Ammonium chloride

B. Urea

C. Ammonium nitrate

D. Ammonium sulphate

60. ______________ is the most suitable fertiliser for paddy?
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A. Potassium nitrate

B. Urea

C. Ammonium sulphate

D. Superphosphate

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