MCQOPTIONS
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MCQOPTIONS
This section includes 595 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 551. |
Which of the following impurities in feed water for high pressure boiler is the most detrimental ? |
| A. | Silica |
| B. | Dissolved oxygen |
| C. | Suspended salt |
| D. | Dissolved salt |
| Answer» B. Dissolved oxygen | |
| 552. |
Fatty material used in soap making is |
| A. | fatty acid |
| B. | fatty alcohols |
| C. | tallow |
| D. | detergents |
| Answer» D. detergents | |
| 553. |
The major constituents of glass are |
| A. | lime, clay and soda ash |
| B. | sand, lime and soda ash |
| C. | silica, alumina and clay |
| D. | silica, alumina and soda ash |
| Answer» C. silica, alumina and clay | |
| 554. |
Pitch (a product of coal tar distillation) is always mixed with creosote oil, when it is to be burnt in a burner, because |
| A. | its calorific value is very less. |
| B. | tar neutralises the residual acids present in pitch. |
| C. | it reduces viscosity and imparts fluidity for its transportation through pipelines at economic pressure drop. |
| D. | all (a), (b) and (c). |
| Answer» D. all (a), (b) and (c). | |
| 555. |
Which is the most efficient absorbant for SO3 out of the following ? |
| A. | 20% oleum |
| B. | 65% oleum |
| C. | 78%H2SO4 |
| D. | 98%H2SO4 |
| Answer» E. | |
| 556. |
Common salt is generally not produced commonly by __________ method from brine. |
| A. | freeze drying |
| B. | electrolytic |
| C. | solar evaporation |
| D. | vacuum evaporation |
| Answer» B. electrolytic | |
| 557. |
Viscose rayon is chemically |
| A. | cellulose nitrate |
| B. | regenerated cellulose nitrate |
| C. | cellulose acetate |
| D. | regenerated cellulose acetate |
| Answer» E. | |
| 558. |
Caprolactum (a raw material for nylon-6 manufacture) is produced from |
| A. | phenol |
| B. | naphthalene |
| C. | benzene |
| D. | pyridine |
| Answer» D. pyridine | |
| 559. |
Fermentation of molasses to produce ethyl alcohol is done at __________ °C |
| A. | 20 - 30 |
| B. | < - 5 |
| C. | 100 - 150 |
| D. | 250 - 300 |
| Answer» B. < - 5 | |
| 560. |
Carbon tetrachloride (CCl4) is the starting raw material for the manufacture of |
| A. | trichloroethylene |
| B. | perchloroethylene |
| C. | parathion |
| D. | methanol |
| Answer» C. parathion | |
| 561. |
Which of the following is an ore of iron ? |
| A. | Galena |
| B. | Chalcopyrite |
| C. | Hematite |
| D. | Bauxite |
| Answer» D. Bauxite | |
| 562. |
Claude process of gas liquefaction employs |
| A. | merely compression of gas beyond its critical pressure. |
| B. | Joule-Thomson expansion cooling. |
| C. | heat exchange with colder stream. |
| D. | adiabatic expansion against a piston or in a turbine. |
| Answer» E. | |
| 563. |
Tall oil obtained as a by-product from the black liquor recovery is |
| A. | a black, sticky & viscous liquid. |
| B. | used in the manufacture of greases, emulsions & soaps. |
| C. | composed mainly of rosin & fatty acids. |
| D. | all (a), (b) & (c). |
| Answer» E. | |
| 564. |
Which of the following processes does not produce Cl2 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 | |
| 565. |
Margarine is a/an |
| A. | fat |
| B. | explosive |
| C. | plasticiser |
| D. | rocket propellant |
| Answer» B. explosive | |
| 566. |
Process conditions in fermentator used for production of penicillin is |
| A. | 25°C, 2 atm. |
| B. | 50°C, l0 atm. |
| C. | 30°C, 200 mm Hg (absolute). |
| D. | 90°C, 45 atm. |
| Answer» B. 50¬∞C, l0 atm. | |
| 567. |
Yellow glycerine is made into white, using |
| A. | activated carbon |
| B. | diatomaceous earth |
| C. | bauxite |
| D. | bentonite |
| Answer» B. diatomaceous earth | |
| 568. |
Solvent extracted oil |
| A. | has low free fatty acid content. |
| B. | is odourless. |
| C. | has more of unsaturates. |
| D. | none of these. |
| Answer» E. | |
| 569. |
Dehydrogenation of ethyl benzene produces |
| A. | styrene |
| B. | naphthalene |
| C. | phenol |
| D. | benzoic acid |
| Answer» B. naphthalene | |
| 570. |
Which of the following contains least amount of N2 ? |
| A. | Coke oven gas |
| B. | Blast furnace gas |
| C. | Producer gas |
| D. | Water gas (blue gas). |
| Answer» B. Blast furnace gas | |
| 571. |
The compressive strength of cement should not be less than about 110Kg/cm2 after three days & not less than 170Kg/cm2 after seven days. The fineness of an ordinary cement as determined by turbidimetric method should be about __________ cm2/gm. |
| A. | 800 |
| B. | 1600 |
| C. | 4000 |
| D. | 8500 |
| Answer» C. 4000 | |
| 572. |
Haemoglobin is a/an |
| A. | amino acid |
| B. | biological catalyst |
| C. | protein |
| D. | enezyme |
| Answer» D. enezyme | |
| 573. |
__________ process is used for the manufacture of sodium carbonate by ammonia soda process. |
| A. | Ostwald's |
| B. | Bosch |
| C. | Solvay |
| D. | Haber's |
| Answer» D. Haber's | |
| 574. |
DDT stands for |
| A. | diethyl-diphenyl-trichloromethane. |
| B. | dichloro-diphenyl-trichloromethane. |
| C. | diphenyl-dichloro-trichloromethane. |
| D. | dichloro-diphenyl-trichloroethane. |
| Answer» E. | |
| 575. |
Lithopaneis |
| A. | explosive |
| B. | white lead |
| C. | filter aid |
| D. | ZnS (white pigment) |
| Answer» E. | |
| 576. |
Starting raw material for the manufacture of alum is |
| A. | alumina |
| B. | gypsum |
| C. | bauxite |
| D. | ammonium bicarbonate |
| Answer» D. ammonium bicarbonate | |
| 577. |
Sucrose content in the raw juice extracted from sugar cane is about __________ percent. |
| A. | 43497 |
| B. | 15 - 20 |
| C. | 50 - 60 |
| D. | 80 - 85 |
| Answer» C. 50 - 60 | |
| 578. |
The noble gas which occurs most abundantly in the atmosphere is |
| A. | helium |
| B. | neon |
| C. | krypton |
| D. | argon |
| Answer» E. | |
| 579. |
Which of the following sugars is the sweetest? |
| A. | Glucose |
| B. | Fructose |
| C. | Sucrose |
| D. | Lactose |
| Answer» C. Sucrose | |
| 580. |
In sulphate pulp manufacture, the pressure and temperature in the digestor is |
| A. | 10 atm., 800 °C |
| B. | 10 atm., 170-180°C |
| C. | 1 atm., 170 - 180°C |
| D. | l atm., 800°C |
| Answer» C. 1 atm., 170 - 180¬∞C | |
| 581. |
Nylon-6 is a |
| A. | polyamide |
| B. | thermosetting resin |
| C. | polyester |
| D. | none of these |
| Answer» B. thermosetting resin | |
| 582. |
Which is the main reducing agent during production of iron from iron ore in a blast furnace ? |
| A. | C |
| B. | CO |
| C. | CO2 |
| D. | H2 |
| Answer» C. CO2 | |
| 583. |
In the Solvay process, the product from the calciner is |
| A. | light soda ash |
| B. | dense soda ash |
| C. | sodium bicarbonate |
| D. | dehydrated soda ash |
| Answer» B. dense soda ash | |
| 584. |
All enzymes are made of |
| A. | fats |
| B. | carbohydrates |
| C. | proteins |
| D. | amino acids |
| Answer» D. amino acids | |
| 585. |
Calgon used in water treatment is chemically |
| A. | sodium phosphate |
| B. | sodium hexametaphosphate |
| C. | calcium phosphate |
| D. | tricresyl phosphate |
| Answer» C. calcium phosphate | |
| 586. |
Sulphur addition in soap is done to |
| A. | improve the soap texture. |
| B. | cure pimples & dandruff. |
| C. | fasten lather formation. |
| D. | increase its cleansing action. |
| Answer» C. fasten lather formation. | |
| 587. |
A unit operation is exemplified by the process of |
| A. | reduction |
| B. | desorption |
| C. | nitration |
| D. | combustion |
| Answer» C. nitration | |
| 588. |
Starting material for the production of styrene butadiene rubber (SBR) is |
| A. | ethyl alcohol |
| B. | ethylene |
| C. | both (a) & (b) |
| D. | neither (a) nor (b) |
| Answer» D. neither (a) nor (b) | |
| 589. |
Paper pulp produced by kraft/sulphate process is |
| A. | bleached easily |
| B. | dull white in color |
| C. | strong fibrous |
| D. | dark colored |
| Answer» D. dark colored | |
| 590. |
Wood charcoal is used for decolouration of sugar, because it __________ the coloured materials. |
| A. | adsorbs |
| B. | oxidises |
| C. | reduces |
| D. | converts |
| Answer» B. oxidises | |
| 591. |
Salt cake is chemically represented by |
| A. | Na2SO4 |
| B. | CaSO4.H2O |
| C. | MgSO4 |
| D. | BaSO4 |
| Answer» B. CaSO4.H2O | |
| 592. |
In the manufacture of viscose rayon, the raw material used industrially is |
| A. | recalyptious wood |
| B. | bamboo |
| C. | bagasse |
| D. | fine teak wood |
| Answer» E. | |
| 593. |
Gun powder, which is an explosive comprises of charcoal, sulphur and |
| A. | glycerene |
| B. | salt petre |
| C. | nitro glycerene |
| D. | dynamite |
| Answer» C. nitro glycerene | |
| 594. |
In multistage equilibrium conversion of SO2 to SO3 (2SO2 + O2 2SO3), the reverse reaction becomes appreciable at a temperature of 550° C. The percentage equilibrium conversion of SO2 to SO3 can be increased by |
| A. | increasing the oxygen concentration. |
| B. | putting more quantity of V2O5 catalyst in the converter. |
| C. | removing some quantity of SO3 during intermediate stage. |
| D. | maintaining low temperature & pressure in the converter. |
| Answer» D. maintaining low temperature & pressure in the converter. | |
| 595. |
Oxidation of SO2 to SO3 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. | |