chemical engineering fertilizer technology MCQs – Page 4

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 Review each marked answer and report any item that may be outdated or unclear.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
61. During nitric acid manufacture, catalytic oxidation of ammonia at 800C in presence of platinum catalyst produces nitrogen oxide. Conversion of NH3 to NO is about ______________ percent?
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A. 82

B. 68

C. 98

D. 38

62. Ammonium nitrate is___________________?
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A. Not hygroscopic

B. Mixed with limestone powder to reduce its explosive nature before using it as a fertilizer

C. Not prone to explosive thermal decomposition

D. Having about 40% N2

63. Heating of coke, sand & phosphate rock in an electric furnace is done for the manufacture of_________________?
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A. Phosphorous

B. Superphosphate

C. Phosphoric acid

D. Triple superphosphate

64. Nitrolime is___________________?
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A. A mixture of ammonium nitrate and calcium nitrate

B. Calcium nitrate

C. A mixture of nitric acid and lime

D. Calcium ammonium nitrate
65. HPO3 is the chemical formula of ______________ phosphoric acid?
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A. None of these

B. Pyro

C. Meta

D. Ortho

66. Urea is formed only____________________?
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A. In vapour phase

B. At very low pressure (vacuum)

C. In liquid phase

D. At very high temperature

67. A fertiliser plant is classified as a gas based fertiliser plant, when it uses ______________ gas as a source of hydrogen for the manufacture of ammonia?
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A. Natural

B. Producer

C. Coal

D. Coke oven

68. Commercial fertilisers are available mostly in the form of__________________?
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A. Lumps

B. Powder

C. Granules

D. Flakes

69. Sodium tri poly phosphate (STPP) is manufactured by reaction of phosphoric acid with sodium___________________?
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A. Silicate

B. Bicarbonate

C. Carbonate

D. Phosphate

70. Yield of urea can be increased with excess ammonia and higher pressure & temperature, but because of ____________ this is normally not done?
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A. Increased biuret formation

B. Increased cost of equipment

C. High corrosion rate

D. All A., B. & C.
71. Which is the most suitable fertiliser for paddy ?
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A. CAN

B. Ammonium nitrate

C. Ammonium sulphate

D. Superphosphate

72. Triple superphosphate is made by reacting phosphate rock with _____________ acid?
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A. Nitric

B. Sulphuric

C. Phosphoric

D. Hydrochloric

73. Nitrogen content of urea is about _____________ percent ?
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A. 46

B. 80

C. 10

D. 94

74. Potassic fertiliser is graded based on its ______________ content?
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A. KCl

B. K2O

C. KNO3

D. K2SO4

75. Which of the following fertilizers is used as a cattle feed ?
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A. Superphosphate

B. Calcium ammonium nitrate

C. Urea

D. Ammonium sulphate

76. Hydrogen content of coke oven gas is ______________ percent?
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A. 58

B. 22

C. 4

D. 84

77. Catalyst used in desulphurisation of naphtha is____________________?
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A. Co-Mo

B. Pt-Rh

C. Nickel

D. Silica gel

78. Raw materials for urea production are _________________?
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A. HNO3 and CaCO3

B. CO2 and N2

C. CO2, H2 and N2

D. NH3 and CO

79. Formation of ammonium carbamate by reaction of NH3 with CO2 is a/an ______________ reaction?
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A. Exothermic

B. Endothermic

C. Reversible

D. Catalytic

80. _____________ is not a fertiliser?
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A. Calcium ammonium nitrate

B. Ferrous sulphate

C. Liquid ammonia

D. Ammonium sulphate