chemical engineering fertilizer technology Mcqs
1. Color of nitric acid is light yellow due to the presence of__________________?
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A. NO2

B. N2H5

C. NO

D. NH3

2. Urea is represented as______________________?
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A. NH.CO2.NH

B. NH2.CO.NH2

C. NH3CO.CH3

D. NH3.CO2.NH3

3. Coal based fertiliser plants at Ramagundam (Andhra Pradesh) and Talcher (Orissa) ?
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A. Use coal as filler in fertiliser

B. Use coal as conditioner in fertiliser

C. Use coal for heating purpose

D. Gasify coal to get hydrogen from coal gas
4. Bio-fertilisers are cheaper, renewable and pollution free. They improve the _____________ of the soil?
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A. Texture

B. All A., B. and C.

C. Water holding capacity

D. Nutrient supply

5. Steam reforming of naphtha is a source of hydrogen production for nitrogenous fertiliser industry. What is the usual ratio of steam to carbon maintained in the process of steam reforming of naphtha ?
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A. 3.5 : 1

B. 1.5 : 1

C. 10:01

D. 15:01

6. Ammonium sulphate fertiliser is __________________?
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A. A neutral fertiliser

B. A basic fertiliser

C. The best fertiliser for paddy

D. The highest concentration nitrogenous fertiliser

7. Catalyst used in ammonia synthesis uses ____________ as a promoter?
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A. Pt

B. Al2O3

C. Ni

D. K2O
8. Catalyst used in steam reforming of naphtha is__________________?
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A. Rhodium

B. Platinum

C. Silica gel

D. Nickel
9. Dehydration of ammonium carbamate produces__________________?
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A. Urea

B. None of these

C. Biuret

D. Ammonia water

10. Which one of the following is used as a nitrogenous fertiliser, as a weed killer in the onion fields and for correcting acidic soils ?
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A. Calcium cyanamide

B. Ammonium sulphate

C. Urea

D. CAN

11. An increase in the NH3/CO2 ratio in urea manufacture results in__________________?
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A. Increased degree of conversion of CO2 to urea

B. Decreased specific volume of molten mass

C. Decreased degree of conversion of NH3 to urea

D. Decreased yield of urea

12. Nitrogen content of calcium ammonium nitrate (CAN) is _____________ percent?
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A. 80

B. 10

C. 25

D. 50

13. Two gas based fertiliser plants are located in India are_________________?
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A. Gujarat and Madhya Pradesh

B. Maharashtra and Gujarat

C. Maharashtra and Orissa

D. Jharkhand and Chhattisgarh

14. The most suitable fertiliser for accelerating seeding or fruit formation in later stages of plant growth is _____________ fertiliser?
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A. Potassic

B. Phosphatic

C. None of these

D. Nitrogenous

15. Red phosphorous is changed into white phosphorous by______________________?
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A. None of these

B. Heating in presence of light

C. Vaporisation followed by condensation

D. Melting under pressure

16. Effectiveness of a fertiliser is independent of the ___________________?
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A. None of these

B. pH of soil

C. Type of crop

D. Nature of soil

17. Multistage operation (as in the case of catalytic oxidation of SO2) is not carried out for NH3 synthesis, because of____________________?
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A. Higher pumping cost

B. Comparatively higher pressure drop

C. Chances of entrainment and disturbance of catalyst bed

D. High cost of the high pressure vessel used for the reactor
18. Conversion of yellow phosphorous to red phosphorous is done by heating it in covered retorts at ____________ C in absence of air?
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A. 50-80

B. 800-900

C. 250-400

D. 1000-1200

19. Naphtha in a fertiliser plant is used as a source of___________________?
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A. O2

B. N2

C. H2

D. Fuel

20. Reaction of anhydrous liquid ammonia with ortho-phosphoric acid produces____________________?
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A. Ammonium phosphate

B. None of these

C. Superphosphate

D. Triple superphosphate

21. Optimum reaction temperature in steam reforming of naphtha is ______________ C?
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A. 100-200

B. 1500-1700

C. 700 1000

D. 300 450

22. Which of the following gasifiers can be attached to coal based fertiliser plants ?
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A. Gasifier working at 20 atm

B. Lurgi (high pressure) gasifier

C. Gasifier working at 40 atm

D. Kopper-Totzek gasifier
23. Ammonium nitrate (is mixed with limestone) is not used as fertiliser as such, because______________________?
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A. It is highly acidic in nature

B. Its nitrogen content is very less

C. It is hygroscopic and explosive in nature

D. It is a liquid at room temperature

24. Excessive use of chemical fertilisers causes shrivelling of the roots and wilting of the plant, because the__________________?
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A. Soil becomes too acidic

B. Osmotic pressure of the soil water becomes higher than that of the plant sap

C. Osmotic pressure of the soil water becomes less than that of the plant sap

D. Soil becomes too alkaline

25. Which of the following is not a commercially used feed-stock for the production of ammonia synthesis gas ?
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A. Coal/coke oven gas

B. Naphtha

C. Water

D. Tar
26. CaH4(PO4)2 is the chemical formula of ___________________?
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A. Triple superphosphate

B. Superphosphate

C. Meta phosphoric acid

D. Calcium phosphate

27. Tricresyl phosphate is chemically represented as___________________?
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A. Ca10(PO4)3F6

B. (NH4)2HPO4

C. (CH3 C6 H4)3 PO4

D. NH4H2PO4

28. The essential ingredient of all the synthesis gas is___________________?
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A. N2

B. CO2

C. O2

D. H2
29. A fertiliser contains 82% N2. It could be_____________________?
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A. Liquid NH3

B. None of these

C. Ammonium nitrate

D. Urea

30. Catalyst used in the manufacture of NH3 by Habers process is finely divided________________?
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A. Nickel

B. Iron

C. Alumina

D. Vanadium pentoxide

31. Prilling of urea should be accomplished (in a sprayer) just above the melting point of urea with minimum of retention time, otherwise it will result in__________________?
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A. Non-spherical prills

B. Substantially wet non-flowing and sticky product

C. Low bulk density product

D. Biuret formation
32. Ammonia synthesis reaction is______________________?
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A. None of these

B. Endothermic

C. Autocatalytic

D. Exothermic
33. Use of catalyst is a must in the ammonia manufacture, because the reaction is reversible as well as the heat of dissociation of N2 & H2 is high. The presence of promoter along with the catalyst helps in ______________ of the catalyst ?
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A. Increasing the effectiveness

B. Stabilisation

C. All A, B & C

D. Improving the strength & heat resistance

34. Reaction of ortho-phosphoric acid with soda ash produces______________?
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A. Tributyl phosphate

B. Sodium Tributyl phosphate (STPP)

C. Tricresyl phosphate

D. Nitrophosphate

35. Biuret formation in urea is kept at minimum (< 1 %), because it is___________________?
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A. Explosive in nature

B. Helpful in decomposition of urea

C. Corrosive in nature

D. Toxic and harmful to some crops
36. Reaction of ortho-phosphoric acid with phosphate rock produces _________________?
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A. Monoammonium phosphate

B. Triple superphosphate

C. Meta-phosphoric acid

D. Superphosphate

37. Temperature and pressure in ammonia converter is_________________?
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A. 450 atm, 200C

B. 200 atm, 1000C

C. 450 atm, 550C

D. 450 atm, 1000C

38. _____________ is the undesirable by-product produced in the manufacture of urea ?
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A. Ammonium carbamate

B. Biuret

C. Carbon dioxide

D. Ammonium carbonate

39. Ammonium sulphate can be produced by reacting gypsum with____________________?
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A. Ammonia

B. None of these

C. Ammonium carbonate

D. Nitric acid

40. Promoter used in NH3 synthesis catalyst is__________________?
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A. SiO3

B. K2O

C. U2O3

D. V2O5
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