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.
| 101. |
The purpose of adding Na2CO3 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 | |
| 102. |
The product obtained on mixing calcium oxide with water is called __________________? |
| A. | Quicklime |
| B. | Slaked lime |
| C. | Milk of lime |
| D. | None of these |
| Answer» C. Milk of lime | |
| 103. |
The process used for the manufacture of ethyl alcohol from molasses is_________________? |
| A. | Distillation |
| B. | Dehydration |
| C. | Dehydrogenation |
| D. | None of these |
| Answer» E. | |
| 104. |
The process involved in converting rubber into a thin sheet or coating it on fabric is called ___________________? |
| A. | Extrusion |
| B. | Mastication |
| C. | Calendaring |
| D. | Vulcanisation |
| Answer» D. Vulcanisation | |
| 105. |
The most widely used coagulant for removing suspended impurities from water is__________________? |
| A. | Bleaching powder |
| B. | Chlorine |
| C. | Calcium sulphate |
| D. | Alum |
| Answer» E. | |
| 106. |
The most stable allotropic form of phosphorous is the _________________ phosphorous? |
| A. | White |
| B. | Black |
| C. | Yellow |
| D. | Red |
| Answer» C. Yellow | |
| 107. |
The most reactive allotropic form of phosphorus is __________________ phosphorus? |
| A. | Red |
| B. | Yellow |
| C. | Violet |
| D. | Black |
| Answer» C. Violet | |
| 108. |
The most popular and common detergent i.e., alkyl benzene sulfonate (ABS) is a/an ______________ detergent ? |
| A. | Cationic |
| B. | Anionic |
| C. | Amphoteric |
| D. | Semi polar |
| Answer» C. Amphoteric | |
| 109. |
The most economical pulp for the production of newsprint would be the _____________________ pulp? |
| A. | Ground-wood |
| B. | Sulphate |
| C. | Sulphite |
| D. | Semi-chemical |
| Answer» B. Sulphate | |
| 110. |
The most commonly used substance to speed up the sedimentation of sewage is___________________? |
| A. | Lime |
| B. | Sulphuric acid |
| C. | Chlorine |
| D. | Sodium bisulphite |
| Answer» B. Sulphuric acid | |
| 111. |
The metallic aluminium is obtained from pure alumina in the presence of fused cryolite by_________________? |
| A. | Electrolysis |
| B. | Electrolytic reduction |
| C. | Electrolytic oxidation |
| D. | None of these |
| Answer» C. Electrolytic oxidation | |
| 112. |
The manufacture of Kraft pulp is done by a/an _________________ process? |
| A. | Alkaline |
| B. | Acidic |
| C. | Neutral |
| D. | None of these |
| Answer» B. Acidic | |
| 113. |
The major use of butadiene is____________________? |
| A. | As a plasticiser for unsaturated polyester |
| B. | In the manufacture of synthetic rubber |
| C. | As an anti-skinning agent in paint |
| D. | None of these |
| Answer» C. As an anti-skinning agent in paint | |
| 114. |
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 | |
| 115. |
The major constituent of black liquor generated during paper manufacture is sodium___________________? |
| A. | Sulphate |
| B. | Carbonate |
| C. | Hydroxide |
| D. | Bi-carbonate |
| Answer» C. Hydroxide | |
| 116. |
The main use of HCl is in the___________________? |
| A. | Drilling of petroleum wells and pickling of steel sheets |
| B. | Manufacture of cationic detergent |
| C. | Treatment of spent fuel of nuclear reactor |
| D. | None of these |
| Answer» B. Manufacture of cationic detergent | |
| 117. |
The main use of activated carbon in water treatment is to control ___________________? |
| A. | Bacterial growth |
| B. | Taste and odour |
| C. | Turbidity |
| D. | None of these |
| Answer» C. Turbidity | |
| 118. |
The main product of high temperature carbonisation of coal is_____________________? |
| A. | Coke |
| B. | Ammonia |
| C. | Tar |
| D. | Phenol |
| Answer» B. Ammonia | |
| 119. |
The main component of Pyrex glass is_____________________? |
| A. | Zinc |
| B. | Lead |
| C. | Boron |
| D. | Selenium |
| Answer» C. Boron | |
| 120. |
The main aim behind cooling the digested chip at the bottom portion of the digestor by injecting cold black liquor is to___________________? |
| A. | Avoid mechanical weakening of fibre |
| B. | Remove lignin by way of crystallisation |
| C. | Increase the cellulose content |
| D. | None of these |
| Answer» B. Remove lignin by way of crystallisation | |
| 121. |
The ideal pulp for the manufacture of paper should have high ____________________ content? |
| A. | Cellulose |
| B. | Lignin |
| C. | Both A. & B. |
| D. | None of these |
| Answer» B. Lignin | |
| 122. |
The gasification reaction represented by, C + H2O = CO + H2, is a/an _________________ reaction? |
| A. | Exothermic |
| B. | Endothermic |
| C. | Catalytic |
| D. | Autocatalytic |
| Answer» C. Catalytic | |
| 123. |
The function of gypsum addition during cement making is to_________________? |
| A. | Increase the density of cement |
| B. | Decrease the cement setting rate |
| C. | Both A. and B. |
| D. | Neither A. nor B. |
| Answer» C. Both A. and B. | |
| 124. |
The enzyme which converts starch into the disaccharides maltose is_________________? |
| A. | Diastase |
| B. | Maltase |
| C. | Yeast |
| D. | None of these |
| Answer» B. Maltase | |
| 125. |
The end bleaching agent used to move last traces of colour bodies from the pulp is ____________________? |
| A. | Chlorine dioxide (ClO2) |
| B. | MgO |
| C. | SO2 gas |
| D. | Mercaptans |
| Answer» B. MgO | |
| 126. |
The drug used in contraceptives is____________________? |
| A. | Sulfadiazine |
| B. | Mestranol |
| C. | Methyl salicylate |
| D. | Penicillin |
| Answer» C. Methyl salicylate | |
| 127. |
The difference between saponification value and acid value is____________________? |
| A. | Called ester value |
| B. | Always negative |
| C. | Constant for all fatty oils |
| D. | None of these |
| Answer» B. Always negative | |
| 128. |
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 | |
| 129. |
The combustion reaction, C + O2 = CO2, is__________________? |
| A. | Exothermic |
| B. | Endothermic |
| C. | Autocatalytic |
| D. | None of these |
| Answer» B. Endothermic | |
| 130. |
The chamber process is______________________? |
| A. | Preferred over contact process for producing 98 to 100% H2SO4 and various oleums |
| B. | Non-catalytic and operates only on pyrites |
| C. | A batch process for directly producing high strength (98 to 100%) H2SO4 |
| D. | None of these |
| Answer» E. | |
| 131. |
The catalyst used in the production of elemental sulphur from H2S (by oxidation-reduction) is _____________________? |
| A. | Alumina |
| B. | Silica gel |
| C. | Platinum |
| D. | Nickel |
| Answer» B. Silica gel | |
| 132. |
The catalyst used in the manufacture of DDT (from chloral and chlorobenzene) is _________________? |
| A. | Dilute H2SO4 |
| B. | Oleum |
| C. | Ultraviolet light |
| D. | None of these |
| Answer» C. Ultraviolet light | |
| 133. |
The catalyst used in shift converter is___________________? |
| A. | Nickel |
| B. | Vanadium |
| C. | Silica gel |
| D. | Alumina |
| Answer» B. Vanadium | |
| 134. |
The biochemical treatment applied to sewage effluents is a process of__________________? |
| A. | Dehydration |
| B. | Reduction |
| C. | Oxidation |
| D. | Polymerisation |
| Answer» D. Polymerisation | |
| 135. |
The basic difference between vegetable oils and fats is in their ___________________? |
| A. | Density |
| B. | Chemical properties |
| C. | Physical state |
| D. | Composition |
| Answer» D. Composition | |
| 136. |
The basic constituent of vegetable oils is ___________________? |
| A. | Triglyceride |
| B. | Fatty acids |
| C. | Fatty alcohol |
| D. | Mono esters |
| Answer» B. Fatty acids | |
| 137. |
The amount of benzene present in pure Benzol is about _______________ percent ? |
| A. | 30 |
| B. | 50 |
| C. | 70 |
| D. | 90 |
| Answer» D. 90 | |
| 138. |
Sea weeds are an important source of_________________? |
| A. | Fluorine |
| B. | Chlorine |
| C. | Bromine |
| D. | Iodine |
| Answer» E. | |
| 139. |
Sea water contains about ______________________ ppm of bromine ? |
| A. | 5 |
| B. | 70 |
| C. | 500 |
| D. | 1700 |
| Answer» C. 500 | |
| 140. |
Saponification value/number of an oil or fat is a measure of its ___________________? |
| A. | Fatty acid content |
| B. | Degree of unsaturation of the fatty acids present in it |
| C. | Average molecular weight |
| D. | Insoluble fatty acid content |
| Answer» D. Insoluble fatty acid content | |
| 141. |
Saponification number of an oil or fat____________________? |
| A. | Gives an idea about its molecular weight |
| B. | Is inversely proportional to its molecular weight |
| C. | Detects its adulteration |
| D. | All A , B. & C. |
| Answer» E. | |
| 142. |
Sand and ______________ is fused at 1300°C, to produce sodium silicate ? |
| A. | Limestone |
| B. | Soda ash |
| C. | Coke |
| D. | Sodium sulphate |
| Answer» C. Coke | |
| 143. |
Salt is the basic raw material for the manufacture of____________________? |
| A. | Cement |
| B. | Glass |
| C. | Potteries |
| D. | Caustic soda |
| Answer» E. | |
| 144. |
Salt is added in the kettle during soap manufacture to separate ___________________? |
| A. | Soap from lye |
| B. | Glycerine from lye |
| C. | The metallic soap |
| D. | The unsaponified fat from soap |
| Answer» B. Glycerine from lye | |
| 145. |
Salt cake is chemically represented by_________________? |
| A. | Na2SO4 |
| B. | CaSO4. ½H2O |
| C. | MgSO4 |
| D. | BaSO4 |
| Answer» B. CaSO4. ½H2O | |
| 146. |
Rotary kiln is not involved in the production of___________________? |
| A. | Cement |
| B. | Lime from limestone |
| C. | Slaked lime from quick lime |
| D. | None of these |
| Answer» D. None of these | |
| 147. |
Rosin soap is added during paper manufacture to____________________? |
| A. | Impart adhesive properties |
| B. | Improve opacity |
| C. | Impart resistance to penetration by liquids |
| D. | None of these |
| Answer» D. None of these | |
| 148. |
Roasting of metallurgical ores is done mainly to ___________________? |
| A. | Dehydrate it |
| B. | Sinter the ore |
| C. | Remove CO2 & H2O |
| D. | Remove arsenic & sulphur |
| Answer» E. | |
| 149. |
Riboflavin is a/an____________________? |
| A. | Vitamin |
| B. | Analgesic drug |
| C. | Anaesthetics |
| D. | Anti-malarial drug |
| Answer» B. Analgesic drug | |
| 150. |
Reverse osmosis is normally used for the_______________? |
| A. | Separation of isotopes of uranium from gaseous uranium hexafluoride |
| B. | Separation of helium from natural gas |
| C. | Desalination of brackish water to produce potable (drinking) water |
| D. | Purification of oxygen |
| Answer» D. Purification of oxygen | |