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.
| 1. |
With increases in pressure, the conversion of Ammonium carbamate into urea___________________? |
| A. | Increases |
| B. | Decreases |
| C. | Remains unaltered |
| D. | Can either increase or decrease depends on biuret content |
| Answer» B. Decreases | |
| 2. |
Yield of elemental phosphorous from rock phosphate is about _____________ percent? |
| A. | 1-2 |
| B. | 15-25 |
| C. | 40-45 |
| D. | 60-65 |
| Answer» C. 40-45 | |
| 3. |
Yield of urea can be increased with excess ammonia and higher pressure & temperature, but because of ____________ this is normally not done? |
| A. | Increased biuret formation |
| B. | High corrosion rate |
| C. | Increased cost of equipment |
| D. | All A., B. & C. |
| Answer» E. | |
| 4. |
Which of the following solvents is used for the extraction of H3PO4 from CaCl2 solution during manufacture of ortho-phosphoric acid by wet process employing hydrochloric acid leaching ? |
| A. | Isopropyl alcohol |
| B. | Butyl alcohol |
| C. | Toluene |
| D. | Hexane |
| Answer» C. Toluene | |
| 5. |
Which of the following set of conditions is favourable for the maximum yield of ammonia by Haber’s process ? |
| A. | High pressure, low reactants concentration, high temperature |
| B. | High pressure, low reactants concentration, low temperature |
| C. | High pressure, high reactants concentration, low temperature |
| D. | Low pressure, high reactants concentration, low temperature |
| Answer» D. Low pressure, high reactants concentration, low temperature | |
| 6. |
Which of the following is the costliest source of hydrogen needed for ammonia manufacture under Indian condition _______________? |
| A. | Electrolysis of water |
| B. | Cryogenic removal of H2 from coke oven gas |
| C. | Steam reforming of naphtha |
| D. | Natural gas cracking |
| Answer» B. Cryogenic removal of H2 from coke oven gas | |
| 7. |
Which of the following is not a measure component necessarily to be present in fertilisers ? |
| A. | Nitrogen |
| B. | Potassium |
| C. | Phosphorous |
| D. | Sulphur |
| Answer» E. | |
| 8. |
Which of the following is not a commercially used feed-stock for the production of ammonia synthesis gas ? |
| A. | Water |
| B. | Naphtha |
| C. | Tar |
| D. | Coal/coke oven gas |
| Answer» D. Coal/coke oven gas | |
| 9. |
Which of the following fertilizers is used as a cattle feed ? |
| A. | Urea |
| B. | Calcium ammonium nitrate |
| C. | Superphosphate |
| D. | Ammonium sulphate |
| Answer» B. Calcium ammonium nitrate | |
| 10. |
Which of the following fertilisers contains the least percentage of nitrogen ? |
| A. | Liquid ammonia |
| B. | Urea |
| C. | Ammonium phosphate |
| D. | Ammonium sulphate |
| Answer» D. Ammonium sulphate | |
| 11. |
Which of the following does not come under the category of ‘secondary nutrient’ for plant growth ? |
| A. | Calcium |
| B. | Magnesium |
| C. | Sulphur |
| D. | Oxygen |
| Answer» E. | |
| 12. |
Vetrocoke solution is_________________? |
| A. | A mixture of K2CO3 and As2O3 |
| B. | K2SO4 |
| C. | A mixture of Na2CO3 and As2O3 |
| D. | Na2SO4 |
| Answer» B. K2SO4 | |
| 13. |
Vapor phase reaction of ammonia & nitric acid to produce ammonium nitrate is termed as the _______________ process? |
| A. | Haber’s |
| B. | Stengel |
| C. | Le-chatelier’s |
| D. | Du-pont’s |
| Answer» C. Le-chatelier’s | |
| 14. |
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 ? |
| A. | Stabilisation |
| B. | Increasing the effectiveness |
| C. | Improving the strength & heat resistance |
| D. | All A, B & C |
| Answer» E. | |
| 15. |
Urea is represented as______________________? |
| A. | NH2.CO.NH2 |
| B. | NH3CO.CH3 |
| C. | NH.CO2.NH |
| D. | NH3.CO2.NH3 |
| Answer» B. NH3CO.CH3 | |
| 16. |
Urea is formed only____________________? |
| A. | In liquid phase |
| B. | In vapour phase |
| C. | At very high temperature |
| D. | At very low pressure (vacuum) |
| Answer» B. In vapour phase | |
| 17. |
Urea is a better fertilizer than ammonium sulphate, because__________________? |
| A. | It is cheaper |
| B. | Nitrogen content is higher |
| C. | It is not poisonous |
| D. | It is easy to manufacture |
| Answer» C. It is not poisonous | |
| 18. |
Urea (a nitrogenous fertiliser) is produced from carbon dioxide and__________________? |
| A. | Nitric acid |
| B. | Ammonia |
| C. | Ammonium nitrate |
| D. | Nitric oxide |
| Answer» C. Ammonium nitrate | |
| 19. |
Two gas based fertiliser plants are located in India are_________________? |
| A. | Maharashtra and Gujarat |
| B. | Maharashtra and Orissa |
| C. | Gujarat and Madhya Pradesh |
| D. | Jharkhand and Chhattisgarh |
| Answer» B. Maharashtra and Orissa | |
| 20. |
Triple superphosphate which contains about 46% P2O5 is produced by the reaction of phosphate rock with ortho phosphoric acid of_____________ percent concentration? |
| A. | 25-28 |
| B. | 52-54 |
| C. | 75-80 |
| D. | > 98 |
| Answer» C. 75-80 | |
| 21. |
Triple superphosphate is made by reacting phosphate rock with _____________ acid? |
| A. | Phosphoric |
| B. | Nitric |
| C. | Sulphuric |
| D. | Hydrochloric |
| Answer» B. Nitric | |
| 22. |
Triple superphosphate is chemically represented as_____________________? |
| A. | CaF2.3Ca3(PO4)2 |
| B. | 3Ca3(PO4)2 |
| C. | Ca(PO3)2 |
| D. | Ca(H2PO4)2 |
| Answer» B. 3Ca3(PO4)2 | |
| 23. |
Tricresyl phosphate is chemically represented as___________________? |
| A. | (CH3 C6 H4)3 PO4 |
| B. | Ca10(PO4)3F6 |
| C. | (NH4)2HPO4 |
| D. | NH4H2PO4 |
| Answer» B. Ca10(PO4)3F6 | |
| 24. |
Though kinetics of ammonia synthesis dictates the use of low temperature for high equilibrium conversion, yet it is kept moderately high (550°C), because at low temperature___________________? |
| A. | Rate of reaction is very low |
| B. | Very high pressure is required resulting in costly pressure vessel |
| C. | Space velocity of gas is very low resulting in decreased conversion |
| D. | None of these |
| Answer» B. Very high pressure is required resulting in costly pressure vessel | |
| 25. |
Though liquid ammonia itself is a fertiliser (with 82% nitrogen content) yet it is commonly not used as such in a tropical country like India, because it___________________? |
| A. | Has a pungent smell |
| B. | Vaporises at normal temperature |
| C. | Is toxic and highly corrosive |
| D. | Is in short supply |
| Answer» C. Is toxic and highly corrosive | |
| 26. |
The optimum size of the ammonia plant is ______________ tons/day? |
| A. | 10 |
| B. | 100 |
| C. | 1000 |
| D. | 10000 |
| Answer» D. 10000 | |
| 27. |
The most suitable fertiliser for accelerating seeding or fruit formation in later stages of plant growth is _____________ fertiliser? |
| A. | Nitrogenous |
| B. | Phosphatic |
| C. | Potassic |
| D. | None of these |
| Answer» C. Potassic | |
| 28. |
The main constituent of rock phosphate is _____________________? |
| A. | Mono-calcium phosphate |
| B. | Di-calcium phosphate |
| C. | Fluorspar |
| D. | None of these |
| Answer» C. Fluorspar | |
| 29. |
The essential ingredient of all the synthesis gas is___________________? |
| A. | H2 |
| B. | O2 |
| C. | CO2 |
| D. | N2 |
| Answer» B. O2 | |
| 30. |
The concentration (weight %) of nitric acid produced by the oxidation of ammonia and absorption of nitrogen oxides with water is about ____________ percent? |
| A. | 60 |
| B. | 30 |
| C. | 95 |
| D. | 100 |
| Answer» B. 30 | |
| 31. |
The composition of fresh feed to the high temperature, high pressure urea autoclave is______________________? |
| A. | Excess liquid ammonia and liquefied CO2 |
| B. | Excess liquid ammonia and compressed CO2 gas |
| C. | Liquid ammonia and excess compressed CO2 |
| D. | Compressed ammonia gas and excess compressed CO2 |
| Answer» C. Liquid ammonia and excess compressed CO2 | |
| 32. |
Rock phosphate constitutes mainly of___________________? |
| A. | Fluorapatite |
| B. | Di-calcium phosphate |
| C. | Mono-calcium phosphate |
| D. | Di-ammonium phosphate |
| Answer» B. Di-calcium phosphate | |
| 33. |
Red phosphorous is changed into white phosphorous by______________________? |
| A. | Heating in presence of light |
| B. | Melting under pressure |
| C. | Vaporisation followed by condensation |
| D. | None of these |
| Answer» D. None of these | |
| 34. |
Reaction of dilute sulphuric acid with phosphate rock produces ____________________? |
| A. | Phosphoric acid |
| B. | Superphosphate |
| C. | Triple superphosphate |
| D. | Gypsum |
| Answer» B. Superphosphate | |
| 35. |
Reaction of ortho-phosphoric acid with soda ash produces______________? |
| A. | Sodium Tributyl phosphate (STPP) |
| B. | Tricresyl phosphate |
| C. | Tributyl phosphate |
| D. | Nitrophosphate |
| Answer» B. Tricresyl phosphate | |
| 36. |
Reaction of phosphate rock with 98% H2SO4 produces ______________________? |
| A. | Ortho-phosphoric acid |
| B. | Superphosphate |
| C. | White phosphorous |
| D. | None of these |
| Answer» B. Superphosphate | |
| 37. |
Reaction of nitric acid and sulphuric acid with phosphate rock produces_________________? |
| A. | Nitrophosphate |
| B. | Diammonium phosphate |
| C. | Tricresyl phosphate |
| D. | Tributyl phosphate |
| Answer» B. Diammonium phosphate | |
| 38. |
Reaction of ortho-phosphoric acid with phosphate rock produces _________________? |
| A. | Superphosphate |
| B. | Triple superphosphate |
| C. | Meta-phosphoric acid |
| D. | Monoammonium phosphate |
| Answer» C. Meta-phosphoric acid | |
| 39. |
Reaction of Cresylic acid with _____________ produces Tricresyl phosphate? |
| A. | Phosphorous pentoxide |
| B. | Phosphorous oxychloride |
| C. | Ammonium phosphate |
| D. | Calcium phosphate |
| Answer» C. Ammonium phosphate | |
| 40. |
Reaction of anhydrous liquid ammonia with ortho-phosphoric acid produces____________________? |
| A. | Ammonium phosphate |
| B. | Superphosphate |
| C. | Triple superphosphate |
| D. | None of these |
| Answer» B. Superphosphate | |
| 41. |
Reaction of calcium Fluorapatite with sulphuric acid produces ___________________? |
| A. | Ortho-phosphoric acid |
| B. | Simple superphosphate |
| C. | Triple superphosphate |
| D. | Red phosphorous |
| Answer» C. Triple superphosphate | |
| 42. |
Reaction of ______________ acid with phosphate rock produces superphosphates? |
| A. | Hydrochloric |
| B. | Sulphuric |
| C. | Nitric |
| D. | Phosphoric |
| Answer» C. Nitric | |
| 43. |
Raw materials required for the production of CAN (Calcium ammonium nitrate) is NH3__________________? |
| A. | HNO3 & limestone |
| B. | CO2 & H2SO4 |
| C. | HNO3 & NH4Cl |
| D. | CO2 & KNO3 |
| Answer» B. CO2 & H2SO4 | |
| 44. |
Raw materials for urea production are _________________? |
| A. | CO2 and N2 |
| B. | CO2, H2 and N2 |
| C. | NH3 and CO |
| D. | HNO3 and CaCO3 |
| Answer» C. NH3 and CO | |
| 45. |
Raw materials for nitric acid manufacture are___________________? |
| A. | Hydrogen peroxide, air and water |
| B. | Anhydrous ammonia and air |
| C. | Anhydrous ammonia, air and water |
| D. | Wet ammonia, air and water |
| Answer» D. Wet ammonia, air and water | |
| 46. |
Promoter used in NH3 synthesis catalyst is__________________? |
| A. | K2O |
| B. | SiO3 |
| C. | V2O5 |
| D. | U2O3 |
| Answer» D. U2O3 | |
| 47. |
Prilling tower is found in the flowsheet for the manufacture of__________________? |
| A. | Ammonia |
| B. | Urea |
| C. | Superphosphate |
| D. | Triple superphosphate |
| Answer» C. Superphosphate | |
| 48. |
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__________________? |
| A. | Low bulk density product |
| B. | Biuret formation |
| C. | Non-spherical prills |
| D. | Substantially wet non-flowing and sticky product |
| Answer» C. Non-spherical prills | |
| 49. |
Potassic fertilisers__________________? |
| A. | Are useful during early stage of the plant growth |
| B. | Stimulate early growth and accelerate seeding |
| C. | Help in development of starches of potatoes and grain |
| D. | None of these |
| Answer» D. None of these | |
| 50. |
Potassic fertilisers do not promote the development of ______________________? |
| A. | Stems & leaves during early stage of plant growth |
| B. | Starches of potatoes & grains |
| C. | Sugar of fruits & vegetables |
| D. | Fibrous materials of plants |
| Answer» B. Starches of potatoes & grains | |