chemical engineering fertilizer technology Mcqs
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

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

81. H4P2O7 is the chemical formula of _____________ phosphoric acid?
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A. Pyro

B. Ortho

C. Meta

D. None of these

82. NPK fertiliser is a _______________ fertiliser?
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A. Complex

B. Nitrogenous

C. Mixed

D. Phosphatic

83. Which of the following fertilisers is needed for promoting the development of leaves and stems during early stages of plant growth ?
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A. Potassic fertiliser

B. Nitrogenous fertiliser

C. None of these

D. Phosphatic fertiliser

84. -10-5 fertilisers mean that they contain______________?
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A. 5, 10, 5% respectively of N2, P2O5 and K2O

B. Only 5 to 10% active fertiliser constituents

85. Fertiliser plants get their N2 requirements _____________________?
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A. From coal gas (coke oven gas)

B. By fractionation of liquefied air

C. By dissociating oxides of nitrogen

D. From producer gas

86. _____________ is required more for leafy crops?
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A. Potassium

B. Nitrogen

C. Phosphorous

D. Carbon

87. Nitrogen content of a nitrogenous fertiliser is 35%. It could be___________________?
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A. Calcium ammonium nitrate (CAN)

B. Ammonium sulphate

C. Ammonium nitrate

D. Urea

88. Temperature and pressure in urea autoclave is_________________?
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A. 120C and 300 atm

B. 400C and 550 atm

C. 200C and 10 atm

D. 190C and 200 atm
89. Phosphatic fertiliser is graded based on its _____________ content?
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A. P2O3

B. PCl5

C. H3PO4

D. P2O5
90. 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________________?
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A. High pressure

B. Low pressure

C. Atmospheric pressure; as the pressure has no effect on conversion

D. Very high temperature

91. Which nutrient in fertiliser makes the plant stems stronger and increases branching ?
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A. Phosphorous

B. Potassium

C. Nitrogen

D. Calcium

92. C/H ratio (by weight) of naphtha used in nitrogenous fertiliser making is about_________________?
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A. 13

B. 2

C. 6

D. 20

93. Conditioners like finely divided peat are added to the fertiliser to________________?
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A. Counteract burning

B. Avoid caking & hardening

C. Produce bulk

D. Increase its solubility

94. A Potassic fertiliser contains 50% K2O. It could be _________________?
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A. Potassium sulphate

B. None of these

C. A mixture of NaCl + KCl

D. Potassium chloride

95. Lower temperature and large excess of ammonia in urea melt__________________?
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A. Is undesirable

B. Increases biuret formation

C. Does not effect biuret formation

D. Decreases biuret formation
96. Urea is a better fertilizer than ammonium sulphate, because__________________?
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A. Nitrogen content is higher

B. It is not poisonous

C. It is cheaper

D. It is easy to manufacture

97. Montecatini process is used for the manufacture of____________________?
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A. Phosphoric acid

B. Urea

C. Calcium ammonium nitrate (CAN)

D. Nitric acid

98. A mixture of phosphate rock ______________ is heated in an electric furnace to produce phosphorous?
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A. Salt & coke

B. Sand & coke

C. And sand

D. And coke

99. Electric process as compared to wet process (for the manufacture of phosphoric acid) ?
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A. Produces a valuable by-product called gypsum

B. Is weak acid process

C. Can use only high grade phosphate rock

D. Is used less frequently
100. Rock phosphate constitutes mainly of___________________?
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A. Di-calcium phosphate

B. Fluorapatite

C. Mono-calcium phosphate

D. Di-ammonium phosphate