MCQOPTIONS
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MCQOPTIONS
This section includes 167 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
Potassic fertiliser is graded based on its ______________ content? |
| A. | KCl |
| B. | K2O |
| C. | KNO3 |
| D. | K2SO4 |
| Answer» C. KNO3 | |
| 52. |
Plant tranquillisers___________________? |
| A. | Hold back stem growth and halt plants at a desired height |
| B. | Cause early maturation of plants |
| C. | Accelerate ripening of food and grain |
| D. | Produce seedless fruit |
| Answer» B. Cause early maturation of plants | |
| 53. |
Phosphorus vapour comprises of ___________________? |
| A. | P |
| B. | P2 |
| C. | P3 |
| D. | P4 |
| Answer» E. | |
| 54. |
Phosphoric acid is produced in wet process from phosphate rock and____________________? |
| A. | Dilute H2SO4 |
| B. | Concentrated H2SO4 |
| C. | Concentrated NHO3 |
| D. | Concentrated HCl |
| Answer» B. Concentrated H2SO4 | |
| 55. |
Phosphatic fertilisers_________________? |
| A. | Are useful during early stage of the plant growth |
| B. | Accelerate fruit formation in later stages of growth |
| C. | Lessen the effect of excessive nitrogen application |
| D. | None of these |
| Answer» C. Lessen the effect of excessive nitrogen application | |
| 56. |
Phosphatic fertiliser is graded based on its _____________ content? |
| A. | P2O3 |
| B. | PCl5 |
| C. | P2O5 |
| D. | H3PO4 |
| Answer» D. H3PO4 | |
| 57. |
pH value of soil is maintained at ______________ by the addition of fertiliser for optimum growth and health of the plant? |
| A. | 4-5 |
| B. | 7-8 |
| C. | 9-10 |
| D. | 12-13 |
| Answer» C. 9-10 | |
| 58. |
P2O5 percentage in the phosphoric acid produced by wet process is about_________________? |
| A. | 10 |
| B. | 30 |
| C. | 50 |
| D. | 70 |
| Answer» C. 50 | |
| 59. |
P2O5 content in superphosphate is about _____________ percent? |
| A. | 30-35 |
| B. | 15-20 |
| C. | 65-70 |
| D. | 85-90 |
| Answer» C. 65-70 | |
| 60. |
P2O5 content in triple superphosphate is about ______________ percent? |
| A. | 42-50 |
| B. | 15-20 |
| C. | 85-90 |
| D. | 70-75 |
| Answer» B. 15-20 | |
| 61. |
Oxidation of ammonia is________________? |
| A. | Exothermic |
| B. | Endothermic |
| C. | Non-catalytic |
| D. | Autocatalytic |
| Answer» B. Endothermic | |
| 62. |
Out of the following, N2 content is minimum in_____________________? |
| A. | Urea |
| B. | Ammonium nitrate |
| C. | Ammonium sulphate |
| D. | Ammonium chloride |
| Answer» D. Ammonium chloride | |
| 63. |
Optimum reaction temperature in steam reforming of naphtha is ______________ °C? |
| A. | 700 – 1000 |
| B. | 300 – 450 |
| C. | 1500-1700 |
| D. | 100-200 |
| Answer» B. 300 – 450 | |
| 64. |
NPK means a ______________ fertiliser? |
| A. | Mixed |
| B. | Potassic |
| C. | Liquid |
| D. | Solid |
| Answer» B. Potassic | |
| 65. |
NPK fertiliser is a _______________ fertiliser? |
| A. | Complex |
| B. | Mixed |
| C. | Nitrogenous |
| D. | Phosphatic |
| Answer» C. Nitrogenous | |
| 66. |
Nitrolime is___________________? |
| A. | Calcium nitrate |
| B. | Calcium ammonium nitrate |
| C. | A mixture of nitric acid and lime |
| D. | A mixture of ammonium nitrate and calcium nitrate |
| Answer» C. A mixture of nitric acid and lime | |
| 67. |
Nitrolime is chemically known as____________________? |
| A. | Calcium nitrate |
| B. | Ammonium nitrate |
| C. | Calcium ammonium nitrate (CAN) |
| D. | None of these |
| Answer» D. None of these | |
| 68. |
Nitrogenous fertiliser is required__________________? |
| A. | During the early stage of growth to promote development of stem and leaves |
| B. | For accelerating fruit formation in later stage of growth |
| C. | To lessen the effect of excessive potash application |
| D. | None of these |
| Answer» B. For accelerating fruit formation in later stage of growth | |
| 69. |
Nitrogen content of urea is about _____________ percent ? |
| A. | 10 |
| B. | 46 |
| C. | 80 |
| D. | 94 |
| Answer» C. 80 | |
| 70. |
Nitrogen content of calcium ammonium nitrate (CAN) is _____________ percent? |
| A. | 10 |
| B. | 25 |
| C. | 50 |
| D. | 80 |
| Answer» C. 50 | |
| 71. |
Nitrogen content of a nitrogenous fertiliser is 35%. It could be___________________? |
| A. | Urea |
| B. | Ammonium nitrate |
| C. | Calcium ammonium nitrate (CAN) |
| D. | Ammonium sulphate |
| Answer» C. Calcium ammonium nitrate (CAN) | |
| 72. |
Nitrogen content in ammonium sulphate (a fertiliser) is around ______________ percent? |
| A. | 5 |
| B. | 20 |
| C. | 50 |
| D. | 65 |
| Answer» C. 50 | |
| 73. |
Nitric acid is produced on commercial scale in a fertiliser plant by___________________? |
| A. | Oxidation of ammonia |
| B. | CaNO3 + H2SO4 reaction |
| C. | Passing air through high voltage electric arc |
| D. | None of these |
| Answer» B. CaNO3 + H2SO4 reaction | |
| 74. |
Neutralisation of nitric acid with ammonia to produce ammonium nitrate is a/an _______________________ reaction? |
| A. | Catalytic |
| B. | Endothermic |
| C. | Exothermic |
| D. | Autocatalytic |
| Answer» D. Autocatalytic | |
| 75. |
Naphtha in a fertiliser plant is used as a source of___________________? |
| A. | Fuel |
| B. | H2 |
| C. | N2 |
| D. | O2 |
| Answer» C. N2 | |
| 76. |
Multistage operation (as in the case of catalytic oxidation of SO2) is not carried out for NH3 synthesis, because of____________________? |
| A. | Comparatively higher pressure drop |
| B. | High cost of the high pressure vessel used for the reactor |
| C. | Higher pumping cost |
| D. | Chances of entrainment and disturbance of catalyst bed |
| Answer» C. Higher pumping cost | |
| 77. |
Montecatini process is used for the manufacture of____________________? |
| A. | Nitric acid |
| B. | Phosphoric acid |
| C. | Urea |
| D. | Calcium ammonium nitrate (CAN) |
| Answer» D. Calcium ammonium nitrate (CAN) | |
| 78. |
Montecatini process is a widely used process for the manufacture of ___________________? |
| A. | Urea |
| B. | Calcium ammonium nitrate |
| C. | Triple superphosphate |
| D. | None of these |
| Answer» B. Calcium ammonium nitrate | |
| 79. |
Maximum stability of white phosphorous is at__________________? |
| A. | Very high pressure |
| B. | Atmospheric pressure |
| C. | Room temperature |
| D. | > 600°C |
| Answer» E. | |
| 80. |
Maximum nitrogen percentage is in________________? |
| A. | Ammonium sulphate |
| B. | Calcium ammonium nitrate |
| C. | Urea |
| D. | Liquid ammonia |
| Answer» E. | |
| 81. |
Main constituent of phosphate rock is_____________________? |
| A. | Ammonium phosphate |
| B. | Flour apatite |
| C. | Calcium fluoride |
| D. | Calcium phosphate |
| Answer» C. Calcium fluoride | |
| 82. |
Main component of bone ash is _________________? |
| A. | Calcium sulphate |
| B. | Calcium phosphate |
| C. | Calcium carbonate |
| D. | Sodium phosphate |
| Answer» C. Calcium carbonate | |
| 83. |
Lower temperature and large excess of ammonia in urea melt__________________? |
| A. | Increases biuret formation |
| B. | Decreases biuret formation |
| C. | Is undesirable |
| D. | Does not effect biuret formation |
| Answer» C. Is undesirable | |
| 84. |
Low grade phosphate rock can be used in electrical furnace, because__________________? |
| A. | Of the better CaO/SiO2 balance for slag formation |
| B. | CaO content is less |
| C. | It is cheap |
| D. | It produces low cost product |
| Answer» B. CaO content is less | |
| 85. |
Low grade coal is ______________ to produce ammonia synthesis gas? |
| A. | Hydrogenated |
| B. | Liquefied |
| C. | Gasified |
| D. | Dehydrogenated |
| Answer» D. Dehydrogenated | |
| 86. |
Liquid ammonia and 60% nitric acid reaction (which produces ammonium nitrate) is___________________? |
| A. | Exothermic |
| B. | Endothermic |
| C. | Autocatalytic |
| D. | None of these |
| Answer» B. Endothermic | |
| 87. |
Leaching of phosphate rock by strong ____________ acid produces phosphoric acid ? |
| A. | Sulphuric |
| B. | Hydrochloric |
| C. | Either A. or B. |
| D. | Neither A. nor B. |
| Answer» D. Neither A. nor B. | |
| 88. |
_____________ is the undesirable by-product produced in the manufacture of urea ? |
| A. | Ammonium carbonate |
| B. | Biuret |
| C. | Carbon dioxide |
| D. | Ammonium carbamate |
| Answer» C. Carbon dioxide | |
| 89. |
______________ is the most suitable fertiliser for paddy? |
| A. | Urea |
| B. | Ammonium sulphate |
| C. | Superphosphate |
| D. | Potassium nitrate |
| Answer» C. Superphosphate | |
| 90. |
_____________ is required more for leafy crops? |
| A. | Nitrogen |
| B. | Phosphorous |
| C. | Potassium |
| D. | Carbon |
| Answer» B. Phosphorous | |
| 91. |
_____________ is not a fertiliser? |
| A. | Calcium ammonium nitrate |
| B. | Ferrous sulphate |
| C. | Liquid ammonia |
| D. | Ammonium sulphate |
| Answer» C. Liquid ammonia | |
| 92. |
Iron is not used alone as a catalyst in ammonia synthesis, because___________________? |
| A. | Its activity declines rapidly, if heated to above 520°C |
| B. | It decomposes ammonia |
| C. | It gets oxidised above 500°C |
| D. | None of these |
| Answer» B. It decomposes ammonia | |
| 93. |
In the manufacture of urea, the intermediate chemical formed is__________________? |
| A. | Biuret |
| B. | Ammonium carbamate |
| C. | Ammonium carbonate |
| D. | None of these |
| Answer» C. Ammonium carbonate | |
| 94. |
In the manufacture of H3 PO4 (ortho); strong H2 SO4 leaching wet process as compared to electric furnace process___________________? |
| A. | Uses lower grade phosphate rock |
| B. | Requires lower capital investment in the plant |
| C. | Produces lower purity acid |
| D. | Is very costly |
| Answer» D. Is very costly | |
| 95. |
In natural gas, the C/H ratio (by weight) varies in the range of_________________? |
| A. | 3-4 |
| B. | 8-10 |
| C. | 15-17 |
| D. | 20-25 |
| Answer» B. 8-10 | |
| 96. |
In _____________ converter for ammonia synthesis, the catalyst is arranged in the form of a single continuous bed? |
| A. | Fauser-Montecatini |
| B. | Claude |
| C. | Uhde |
| D. | Kellogg |
| Answer» C. Uhde | |
| 97. |
In calcium ammonium nitrate (CAN) fertiliser ____________________? |
| A. | Nitrate nitrogen is quick acting |
| B. | Ammoniacal nitrogen is quick acting |
| C. | Nitrate nitrogen is slower acting |
| D. | None of these |
| Answer» B. Ammoniacal nitrogen is quick acting | |
| 98. |
In an ammonia plant, the purge off is essential to___________________? |
| A. | Maintain inert gas concentration within a limit |
| B. | Remove excess poisonous gases |
| C. | Maintain H2 : N2 ratio at 3 :1 |
| D. | Remove uncondensed ammonia vapour |
| Answer» D. Remove uncondensed ammonia vapour | |
| 99. |
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________________? |
| A. | Low pressure |
| B. | High pressure |
| C. | Very high temperature |
| D. | Atmospheric pressure; as the pressure has no effect on conversion |
| Answer» C. Very high temperature | |
| 100. |
Hydrogen content of coke oven gas is ______________ percent? |
| A. | 4 |
| B. | 22 |
| C. | 58 |
| D. | 84 |
| Answer» D. 84 | |