MCQOPTIONS
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MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
HPO3 is the chemical formula of ______________ phosphoric acid? |
| A. | Pyro |
| B. | Ortho |
| C. | Meta |
| D. | None of these |
| Answer» D. None of these | |
| 2. |
Heating of ortho-phosphoric acid to about 900°C, produces_________________? |
| A. | Meta-phosphoric acid |
| B. | Pyrophosphoric acid |
| C. | No change in it |
| D. | None of these |
| Answer» B. Pyrophosphoric acid | |
| 3. |
Heating of ortho-phosphoric acid to 250°C produces___________________? |
| A. | Meta-phosphoric acid |
| B. | Pyrophosphoric acid |
| C. | No change in it |
| D. | None of these |
| Answer» C. No change in it | |
| 4. |
Heating of coke, sand & phosphate rock in an electric furnace is done for the manufacture of_________________? |
| A. | Phosphoric acid |
| B. | Superphosphate |
| C. | Phosphorous |
| D. | Triple superphosphate |
| Answer» D. Triple superphosphate | |
| 5. |
Heating a mixture of phosphate rock, coke and sand in an electric furnace produces___________________? |
| A. | Phosphoric acid |
| B. | Ammonium phosphate |
| C. | Phosphorous |
| D. | Superphosphate |
| Answer» D. Superphosphate | |
| 6. |
H4P2O7 is the chemical formula of _____________ phosphoric acid? |
| A. | Pyro |
| B. | Ortho |
| C. | Meta |
| D. | None of these |
| Answer» B. Ortho | |
| 7. |
H3PO4 is the chemical formula of ______________ phosphoric acid? |
| A. | Pyro |
| B. | Ortho |
| C. | Meta |
| D. | None of these |
| Answer» C. Meta | |
| 8. |
Gas based fertiliser plants use_________________? |
| A. | Natural gas as a source of hydrogen |
| B. | Natural gas as heating medium |
| C. | Coal gas as a source of hydrogen |
| D. | Coal gas as heating medium |
| Answer» B. Natural gas as heating medium | |
| 9. |
Fusion zone in the electric furnace used for reduction of phosphate rock to elemental phosphorous is maintained at ______________ °C? |
| A. | 250-300 |
| B. | 500-750 |
| C. | 950-1050 |
| D. | 1400-1450 |
| Answer» E. | |
| 10. |
Formation of ammonium carbamate by reaction of NH3 with CO2 is a/an ______________ reaction? |
| A. | Catalytic |
| B. | Exothermic |
| C. | Endothermic |
| D. | Reversible |
| Answer» C. Endothermic | |
| 11. |
Flushing liquor used for cooling coke oven gas constitutes of __________________? |
| A. | Ammoniacal liquor |
| B. | K2CO3 solution |
| C. | Dilute H2SO4 |
| D. | Dilute HCl |
| Answer» B. K2CO3 solution | |
| 12. |
Fertiliser value of a nitrogenous fertiliser is expressed in terms of its ______________ content? |
| A. | N2 |
| B. | KNO3 |
| C. | NO2 |
| D. | NHO3 |
| Answer» B. KNO3 | |
| 13. |
Fertiliser produced during soda ash manufacture by dual process is ammonium______________________? |
| A. | Chloride |
| B. | Sulphate |
| C. | Nitrate |
| D. | None of these |
| Answer» B. Sulphate | |
| 14. |
Fertiliser plants get their N2 requirements _____________________? |
| A. | By fractionation of liquefied air |
| B. | By dissociating oxides of nitrogen |
| C. | From coal gas (coke oven gas) |
| D. | From producer gas |
| Answer» B. By dissociating oxides of nitrogen | |
| 15. |
Excessive use of chemical fertilisers causes shrivelling of the roots and wilting of the plant, because the__________________? |
| A. | Osmotic pressure of the soil water becomes less than that of the plant sap |
| B. | Soil becomes too alkaline |
| C. | Osmotic pressure of the soil water becomes higher than that of the plant sap |
| D. | Soil becomes too acidic |
| Answer» D. Soil becomes too acidic | |
| 16. |
Electric process as compared to wet process (for the manufacture of phosphoric acid) ? |
| A. | Can use only high grade phosphate rock |
| B. | Is used less frequently |
| C. | Produces a valuable by-product called gypsum |
| D. | Is weak acid process |
| Answer» C. Produces a valuable by-product called gypsum | |
| 17. |
Electric furnace method for production of phosphorous uses phosphate rock and _________________________? |
| A. | Phosphoric acid |
| B. | Coke |
| C. | Sulphuric acid |
| D. | Silica and coke |
| Answer» E. | |
| 18. |
Effectiveness of a fertiliser is independent of the ___________________? |
| A. | Nature of soil |
| B. | Type of crop |
| C. | pH of soil |
| D. | None of these |
| Answer» E. | |
| 19. |
During nitric acid manufacture, catalytic oxidation of ammonia at 800°C in presence of platinum catalyst produces nitrogen oxide. Conversion of NH3 to NO is about ______________ percent? |
| A. | 38 |
| B. | 68 |
| C. | 82 |
| D. | 98 |
| Answer» E. | |
| 20. |
During conversion of ammonium carbamate into urea, presence of large excess of water______________? |
| A. | Increases the yield of urea |
| B. | Adversely affects the yield of urea |
| C. | Reduces the evaporator load by diluting the urea solution |
| D. | Does not affect the yield of urea |
| Answer» C. Reduces the evaporator load by diluting the urea solution | |
| 21. |
Dehydration of ammonium carbamate to yield urea is a/an __________________ reaction? |
| A. | Exothermic |
| B. | Endothermic |
| C. | Autocatalytic |
| D. | Catalytic |
| Answer» C. Autocatalytic | |
| 22. |
Dehydration of ammonium carbamate (to produce urea) is a/an _____________ reaction? |
| A. | Reversible |
| B. | Catalytic |
| C. | Exothermic |
| D. | Endothermic |
| Answer» E. | |
| 23. |
Dehydration of ammonium carbamate produces__________________? |
| A. | Urea |
| B. | Biuret |
| C. | Ammonia water |
| D. | None of these |
| Answer» B. Biuret | |
| 24. |
Conversion of yellow phosphorus to red phosphorous is done in retorts at 250-450°C in the ___________________? |
| A. | Presence of an inert atmosphere |
| B. | Presence of a reducing atmosphere |
| C. | Absence of air |
| D. | Presence of an oxidising atmosphere |
| Answer» D. Presence of an oxidising atmosphere | |
| 25. |
Conversion of yellow phosphorous to red phosphorous is done by heating it in covered retorts at ____________ °C in absence of air? |
| A. | 50-80 |
| B. | 250-400 |
| C. | 1000-1200 |
| D. | 800-900 |
| Answer» C. 1000-1200 | |
| 26. |
Conditioners like finely divided peat are added to the fertiliser to________________? |
| A. | Counteract burning |
| B. | Avoid caking & hardening |
| C. | Produce bulk |
| D. | Increase its solubility |
| Answer» C. Produce bulk | |
| 27. |
Commercial production of hydrogen for the manufacture of nitrogenous fertilisers is done by________________? |
| A. | Steam reforming of naphtha and cracking of natural gas |
| B. | Electrolysis of water |
| C. | Cryogenic separation of hydrogen from coke oven gas |
| D. | All A., B. and C. |
| Answer» E. | |
| 28. |
Commercial fertilisers are available mostly in the form of__________________? |
| A. | Powder |
| B. | Granules |
| C. | Lumps |
| D. | Flakes |
| Answer» C. Lumps | |
| 29. |
Color of nitric acid is light yellow due to the presence of__________________? |
| A. | NO |
| B. | NO2 |
| C. | N2H5 |
| D. | NH3 |
| Answer» C. N2H5 | |
| 30. |
Coal based fertiliser plants at Ramagundam (Andhra Pradesh) and Talcher (Orissa) ? |
| A. | Use coal for heating purpose |
| B. | Gasify coal to get hydrogen from coal gas |
| C. | Use coal as filler in fertiliser |
| D. | Use coal as conditioner in fertiliser |
| Answer» C. Use coal as filler in fertiliser | |
| 31. |
CO2 present in reformed gas (obtained by steam reforming of naphtha) is removed by absorbing in _________________? |
| A. | Mono-ethanolamine (MEA) |
| B. | Slaked lime |
| C. | Ammoniacal liquor |
| D. | Methyl-Ethyl Ketone (MEK) |
| Answer» B. Slaked lime | |
| 32. |
Chemical formula of meta-phosphoric acid is ___________________? |
| A. | H3PO4 |
| B. | H4P2O7 |
| C. | HPO3 |
| D. | Same as that of Pyrophosphoric acid |
| Answer» D. Same as that of Pyrophosphoric acid | |
| 33. |
Chemical formula of biuret is_________________? |
| A. | NH2.CO.NH2 |
| B. | NH3.COO.NH3 |
| C. | NH2CONHCONH2 |
| D. | NH4COONH2 |
| Answer» D. NH4COONH2 | |
| 34. |
(CH3 C6 H4)3 PO4 is the chemical formula of__________________? |
| A. | Triple superphosphate |
| B. | Tricresyl phosphate |
| C. | Fluorapatite |
| D. | Superphosphate |
| Answer» C. Fluorapatite | |
| 35. |
C/H ratio (by weight) of naphtha used in nitrogenous fertiliser making is about_________________? |
| A. | 2 |
| B. | 6 |
| C. | 13 |
| D. | 20 |
| Answer» C. 13 | |
| 36. |
Catalytic ammonia synthesis reaction as in Haber’s process is_________________? |
| A. | Endothermic |
| B. | Exothermic |
| C. | Irreversible |
| D. | None of these |
| Answer» C. Irreversible | |
| 37. |
Catalyst used in the oxidation of ammonia is ________________? |
| A. | Platinum-beryllium |
| B. | Platinum-rhodium |
| C. | Cobalt-molybdenum |
| D. | Platinum-molybdenum |
| Answer» C. Cobalt-molybdenum | |
| 38. |
Catalyst used in the manufacture of NH3 by Haber’s process is finely divided________________? |
| A. | Nickel |
| B. | Iron |
| C. | Vanadium pentoxide |
| D. | Alumina |
| Answer» C. Vanadium pentoxide | |
| 39. |
Catalyst used in steam reforming of naphtha is ___________________? |
| A. | Bauxite |
| B. | Cobalt |
| C. | Nickel oxide on alumina support |
| D. | Chromium |
| Answer» D. Chromium | |
| 40. |
Catalyst used in steam reforming of naphtha is__________________? |
| A. | Nickel |
| B. | Platinum |
| C. | Silica gel |
| D. | Rhodium |
| Answer» B. Platinum | |
| 41. |
Catalyst used in Haber’s process for ammonia production is_________________? |
| A. | Reduced iron oxide |
| B. | Nickel |
| C. | Vanadium pentoxide |
| D. | Silica gel |
| Answer» B. Nickel | |
| 42. |
Catalyst used in desulphurisation of naphtha is____________________? |
| A. | Co-Mo |
| B. | Pt-Rh |
| C. | Silica gel |
| D. | Nickel |
| Answer» B. Pt-Rh | |
| 43. |
Catalyst used in ammonia synthesis uses ____________ as a promoter? |
| A. | Pt |
| B. | K2O |
| C. | Al2O3 |
| D. | Ni |
| Answer» C. Al2O3 | |
| 44. |
____________ catalyst is used in the production of urea from CO2 and NH3? |
| A. | Vanadium pentoxide |
| B. | No |
| C. | Alumina |
| D. | Nickel |
| Answer» C. Alumina | |
| 45. |
Calcium ammonium nitrate (CAN) is__________________? |
| A. | A mixed fertiliser |
| B. | A straight fertiliser |
| C. | A complex fertiliser |
| D. | Not a fertiliser; it is an explosive |
| Answer» D. Not a fertiliser; it is an explosive | |
| 46. |
CaH4(PO4)2 is the chemical formula of ___________________? |
| A. | Superphosphate |
| B. | Triple superphosphate |
| C. | Calcium phosphate |
| D. | Meta phosphoric acid |
| Answer» C. Calcium phosphate | |
| 47. |
Both white phosphorous as well as red phosphorous_________________? |
| A. | Are soluble in CS2 |
| B. | Burns when heated in air |
| C. | Reacts with hot caustic soda solution to give Phosphine |
| D. | All A., B., and C. |
| Answer» C. Reacts with hot caustic soda solution to give Phosphine | |
| 48. |
Biuret formation in urea is kept at minimum (< 1 %), because it is___________________? |
| A. | Corrosive in nature |
| B. | Toxic and harmful to some crops |
| C. | Helpful in decomposition of urea |
| D. | Explosive in nature |
| Answer» C. Helpful in decomposition of urea | |
| 49. |
Bio-fertilisers are cheaper, renewable and pollution free. They improve the _____________ of the soil? |
| A. | Nutrient supply |
| B. | Texture |
| C. | Water holding capacity |
| D. | All A., B. and C. |
| Answer» E. | |
| 50. |
Base suspension fertiliser essentially contains___________________? |
| A. | 13% N2 and 43% P2O5 |
| B. | 43% N2 and 13% P2O5 |
| C. | 43% N2 and 13% K2O |
| D. | 43% K2O and 43% P2O5 |
| Answer» B. 43% N2 and 13% P2O5 | |