MCQOPTIONS
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MCQOPTIONS
This section includes 1331 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. |
Oxidation of SO to SO is favoured by |
| A. | low temperature and low pressure. |
| B. | low temperature and high pressure. |
| C. | high temperature and low pressure. |
| D. | high temperature and high pressure. |
| Answer» C. high temperature and low pressure. | |
| 2. |
The gasification reaction represented by, C + HO = CO + H, is a/an __________ reaction. |
| A. | exothermic |
| B. | endothermic |
| C. | catalytic |
| D. | autocatalytic |
| Answer» C. catalytic | |
| 3. |
The combustion reaction, C + O = CO, is |
| A. | exothermic |
| B. | endothermic |
| C. | autocatalytic |
| D. | none of these |
| Answer» B. endothermic | |
| 4. |
During the manufacture of sulphuric acid, the temperature of molten sulphur is not increased beyond 160°C, as |
| A. | it is very corrosive at elevated temperature. |
| B. | its viscosity is not reduced on further heating (hence pressure drop on pumping it, cannot be further reduced). |
| C. | it decomposes on further increasing the temperature. |
| D. | none of these. |
| Answer» C. it decomposes on further increasing the temperature. | |
| 5. |
NaCO is called |
| A. | washing soda |
| B. | soda ash |
| C. | plaster of paris |
| D. | calcite |
| Answer» C. plaster of paris | |
| 6. |
The temperature in the calcium carbide furnace is __________ °C. |
| A. | 200-300 |
| B. | 700-850 |
| C. | 2000-2200 |
| D. | 4000-4500 |
| Answer» D. 4000-4500 | |
| 7. |
Argon is the third largest constituent of air (followed by N & O). Its percentage by volume in air is |
| A. | 0.14 |
| B. | 0.34 |
| C. | 0.94 |
| D. | 1.4 |
| Answer» D. 1.4 | |
| 8. |
In contact process, SO is absorbed in 97% HSO and not in water, because |
| A. | SO |
| B. | gas is sparingly soluble in water. |
| C. | water forms an acid mist, which is difficult to absorb. |
| D. | the purity of acid is affected. |
| E. | scale formation in the absorber is to be avoided. |
| Answer» C. water forms an acid mist, which is difficult to absorb. | |
| 9. |
Oxygen is separated by distillation from air after its liquefaction. The boiling point of oxygen is about __________ °C. |
| A. | -83 |
| B. | -183 |
| C. | -196 |
| D. | -218 |
| Answer» C. -196 | |
| 10. |
Which of the following contains least amount of N ? |
| A. | Coke oven gas |
| B. | Blast furnace gas |
| C. | Producer gas |
| D. | Water gas (blue gas). |
| Answer» B. Blast furnace gas | |
| 11. |
Purity of oxygen used for blowing in steel making L.D. converter is 99.5%. The boiling point of oxygen is about __________ °C. |
| A. | -53 |
| B. | -103 |
| C. | -183 |
| D. | -196 |
| Answer» D. -196 | |
| 12. |
Mercury electrolytic cell produces 50-70% NaOH solution. Its operating temperature is __________ °C. |
| A. | 25 |
| B. | 60-70 |
| C. | 150-200 |
| D. | 250-300 |
| Answer» C. 150-200 | |
| 13. |
Exothermic condensation reaction of monochlorobenzene with chloral in presence of 20% oleum as catalyst produces DDT. The reaction temperature is maintained at __________ °C. |
| A. | 15-30 |
| B. | 90-100 |
| C. | 250-300 |
| D. | <0 |
| Answer» B. 90-100 | |
| 14. |
Sand and __________ is fused at 1300°C, to produce sodium silicate. |
| A. | limestone |
| B. | soda ash |
| C. | coke |
| D. | sodium sulphate |
| Answer» C. coke | |
| 15. |
At a given temperature, the equilibrium yield of SO obtained from the oxidation of SO is proportional to (where, = pressure of the system ) |
| A. | 1/ |
| Answer» C. | |
| 16. |
Flash point of most vegetable oils is about __________ °C. |
| A. | 50 |
| B. | 100 |
| C. | 200 |
| D. | 300 |
| Answer» D. 300 | |
| 17. |
Polymerisation product of CF (carbon tetraflouride) is called P.T.F.E (poly chloro tetra flouro ethylene). It is also called |
| A. | polyurethane |
| B. | silicone |
| C. | teflon |
| D. | epoxy resin |
| Answer» D. epoxy resin | |
| 18. |
Very dilute solutions are generally used in fermentation reactions for which the optimum temperature range is __________ °C. |
| A. | -5 to 0 |
| B. | 5 to 10 |
| C. | 30 to 50 |
| D. | 75 to 80 |
| Answer» D. 75 to 80 | |
| 19. |
Conversion of CO to CO by steam in presence of a catalyst is called |
| A. | steam reforming. |
| B. | shift conversion. |
| C. | steam gasification. |
| D. | none of these. |
| Answer» C. steam gasification. | |
| 20. |
Commercial scale production of hydrogen from iron-steam reaction represented by, 3Fe + 3HO = FeO4 + 4H, is not practised, as it is |
| A. | a slow reaction. |
| B. | a discontinuous reaction (requiring regeneration of iron by water gas intermittently). |
| C. | still in development stage (by employing fluidised bed technique). |
| D. | all (a), (b) and (c). |
| Answer» E. | |
| 21. |
The purpose of adding NaCO to water of low alkalinity is to |
| A. | permit the use of alum as a coagulant. |
| B. | increase the softening capacity of zeolite. |
| C. | facilitate easy regeneration of zeolite. |
| D. | all (a), (b) and (c). |
| Answer» B. increase the softening capacity of zeolite. | |
| 22. |
Ca(OH) is called |
| A. | quicklime |
| B. | slaked lime |
| C. | limestone |
| D. | gypsum |
| Answer» C. limestone | |
| 23. |
SO is bubbled through hot sugar cane juice to |
| A. | act as an acidifying agent. |
| B. | increase its concentration. |
| C. | increase the amount of molasses. |
| D. | increase the crystal size. |
| Answer» B. increase its concentration. | |
| 24. |
Heating of __________ to 120°C, produces plaster of paris. |
| A. | blue vitriol |
| B. | gypsum |
| C. | calcium silicate |
| D. | calcium sulphate |
| Answer» C. calcium silicate | |
| 25. |
Absorption of SO in 97% HSO is |
| A. | exothermic |
| B. | endothermic |
| C. | not possible |
| D. | none of these |
| Answer» B. endothermic | |
| 26. |
Which of the following processes does not produce Cl as a co-product during the manufacture of caustic soda ? |
| A. | Diaphragm electrolytic cell process |
| B. | Mercury electrolytic cell process |
| C. | Lime-soda process |
| D. | None of these |
| Answer» D. None of these | |
| 27. |
Carbon tetrachloride (CCl) is the starting raw material for the manufacture of |
| A. | trichloroethylene |
| B. | perchloroethylene |
| C. | parathion |
| D. | methanol |
| Answer» C. parathion | |
| 28. |
The compressive strength of cement should not be less than about 110Kg/cm after three days & not less than 170Kg/cm after seven days. The fineness of an ordinary cement as determined by turbidimetric method should be about __________ cm/gm. |
| A. | 800 |
| B. | 1600 |
| C. | 4000 |
| D. | 8500 |
| Answer» C. 4000 | |
| 29. |
Dry ice (solidified CO) is used for the |
| A. | storage & shipment of frozen foods and ice-creams. |
| B. | liquefaction of permanent gases. |
| C. | liquefaction of natural gas. |
| D. | none of these. |
| Answer» B. liquefaction of permanent gases. | |
| 30. |
Conversion of SO to SO in Monsanto 4-pass converter is about __________ percent. |
| A. | 80 |
| B. | 90 |
| C. | 98 |
| D. | 100 |
| Answer» D. 100 | |
| 31. |
Temperature during hydrogenation of oil should not be more than 200°C, otherwise it will result in |
| A. | pyrolysis of oil. |
| B. | sintering of porous catalyst. |
| C. | hydrogen embrittlement. |
| D. | all (a), (b) and (c). |
| Answer» E. | |
| 32. |
Fermentator temperature during production of alcohol from molasses is around __________ °C. |
| A. | 5 |
| B. | 30 |
| C. | 150 |
| D. | 300 |
| Answer» C. 150 | |
| 33. |
Alum [Al(SO)] is used as a coagulant in water treatment to remove |
| A. | colour |
| B. | turbidity |
| C. | bacteria |
| D. | all (a), (b) and (c) |
| Answer» E. | |
| 34. |
90% of the caprolactum is converted to nylon-6 on its condensation polymerisation in the reactor maintained at __________ °C. |
| A. | <0 |
| B. | 10-30 |
| C. | 250-280 |
| D. | 500-600 |
| Answer» C. 250-280 | |
| 35. |
Hydrazine (NH) is used mainly as a/an |
| A. | explosive |
| B. | rocket fuel |
| C. | detergents additive |
| D. | none of these |
| Answer» C. detergents additive | |
| 36. |
CO & H are the constituents of |
| A. | producer gas |
| B. | water gas |
| C. | coke oven gas |
| D. | all (a), (b) and (c) |
| Answer» E. | |
| 37. |
Presence of HS in raw water (to be chlorinated) results in the |
| A. | reduced softening capacity of zeolite. |
| B. | increased dosage of chlorine to provide a disinfecting residual in the water. |
| C. | easy removal of its hardness. |
| D. | none of these. |
| Answer» C. easy removal of its hardness. | |
| 38. |
NaCO.10HO is called |
| A. | washing soda |
| B. | soda ash |
| C. | slaked lime |
| D. | quicklime |
| Answer» B. soda ash | |
| 39. |
CaSO .HO is known as |
| A. | blue vitriol |
| B. | plaster of Paris |
| C. | gypsum |
| D. | zeolite |
| Answer» C. gypsum | |
| 40. |
Which of the following sugars is the sweetest ? |
| A. | Glucose |
| B. | Fructose |
| C. | Sucrose |
| D. | Lactose |
| Answer» C. Sucrose | |
| 41. |
Which of the following, when pyrolysed, produces Perchloroethylene ? |
| A. | Ethylene dichloride |
| B. | Chlorobenzene |
| C. | Carbon tetrachloride |
| D. | Chlorinated paraffin |
| Answer» D. Chlorinated paraffin | |
| 42. |
White phosphorous is stored under water, because __________________? |
| A. | It does not react with water |
| B. | It is poisonous |
| C. | Its kindling temperature in dry air is very low |
| D. | It is unstable |
| Answer» D. It is unstable | |
| 43. |
Widely used method for the conditioning of boiler feed water is the ___________________? |
| A. | Cold lime process |
| B. | Coagulation |
| C. | Hot-lime soda process |
| D. | Sequestration |
| Answer» D. Sequestration | |
| 44. |
With increase in temperature, the equilibrium constant at constant pressure (Kp) for oxidation of sulphur dioxide________________? |
| A. | Increases |
| B. | Increases linearly |
| C. | Decreases |
| D. | Decreases linearly |
| Answer» D. Decreases linearly | |
| 45. |
Wood charcoal is used for decolouration of sugar, because it _______________ the coloured materials? |
| A. | Adsorbs |
| B. | Oxidises |
| C. | Reduces |
| D. | Converts |
| Answer» B. Oxidises | |
| 46. |
Yeast is used in the manufacture of ____________________? |
| A. | Penicillin |
| B. | Antibiotics |
| C. | Wine |
| D. | Pasteurised milk |
| Answer» D. Pasteurised milk | |
| 47. |
Yellow glycerine is made into white, using____________________? |
| A. | Activated carbon |
| B. | Diatomaceous earth |
| C. | Bauxite |
| D. | Bentonite |
| Answer» B. Diatomaceous earth | |
| 48. |
Yellow phosphorus is transported under____________________? |
| A. | Air |
| B. | Water |
| C. | Nitrogen |
| D. | Helium |
| Answer» C. Nitrogen | |
| 49. |
Zeigler process__________________? |
| A. | Produces high density polyethylene |
| B. | Produces low density polyethylene |
| C. | Uses no catalyst |
| D. | Employs very high pressure |
| Answer» B. Produces low density polyethylene | |
| 50. |
Zeolite is a/an___________________? |
| A. | Naturally occuring clay which is capable of exchanging cations |
| B. | Abrasive material |
| C. | Catalyst used in shift conversion |
| D. | None of these |
| Answer» B. Abrasive material | |