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.
| 101. |
Use of chlorine in the treatment of sewage |
| A. | helps in grease separation. |
| B. | increases the biological oxygen demand(BOD). |
| C. | causes bulking of activated sludge. |
| D. | aids in flocculation. |
| Answer» B. increases the biological oxygen demand(BOD). | |
| 102. |
Hydrazine (N2H4) is used mainly as a/an |
| A. | explosive |
| B. | rocket fuel |
| C. | detergents additive |
| D. | none of these |
| Answer» C. detergents additive | |
| 103. |
Main constituent of limestone is |
| A. | CaCO3 |
| B. | MgCO3 |
| C. | Na2CO3 |
| D. | CaSO4 |
| Answer» B. MgCO3 | |
| 104. |
Flexible foam (for mattresses) is usually made of |
| A. | PVC |
| B. | silicone |
| C. | polyurethanes |
| D. | polyamides |
| Answer» D. polyamides | |
| 105. |
Molecular weights of polymers are in the range of |
| A. | 102 - 102 |
| B. | 105 - 109 |
| C. | 102 - 107 |
| D. | 109 - 1011 |
| Answer» D. 109 - 1011 | |
| 106. |
Soap cannot be used with hard water, because |
| A. | hard water contains sulphate. |
| B. | they form insoluble calcium soaps which precipitate. |
| C. | they attract back the removed dirt. |
| D. | none of these. |
| Answer» C. they attract back the removed dirt. | |
| 107. |
Dense soda ash used in the manufacture of glass, is chemically represented by |
| A. | Na2CO3 |
| B. | Na2CO3.10H2O |
| C. | Na2CO3.H2O |
| D. | Na2HCO3 |
| Answer» D. Na2HCO3 | |
| 108. |
__________ process is used for producing soda ash. |
| A. | Chamber |
| B. | Chance |
| C. | Tromp |
| D. | Solvay |
| Answer» E. | |
| 109. |
Sodium bisulphite is used for __________ water. |
| A. | deaeration |
| B. | dechlorination |
| C. | both (a) & (b) |
| D. | neither (a) nor(b) |
| Answer» D. neither (a) nor(b) | |
| 110. |
Nitrile rubber is produced by the polymerisation of |
| A. | acrylonitrile and butadiene. |
| B. | acrylonitrile and styrene. |
| C. | isobutylene and isoprene. |
| D. | none of these. |
| Answer» B. acrylonitrile and styrene. | |
| 111. |
Phthalic anhydride is made by the |
| A. | oxidation of naphthalene. |
| B. | oxidation of benzene. |
| C. | dehydrogenation of ethyl benzene. |
| D. | none of these. |
| Answer» B. oxidation of benzene. | |
| 112. |
Wax is a |
| A. | mixture of glycerides. |
| B. | mixture of esters of polyhydric alcohols excepting glycerine. |
| C. | liquid at room temperature. |
| D. | mixture of glycerides of fatty acids. |
| Answer» C. liquid at room temperature. | |
| 113. |
Most easily and cheaply available fibrous raw material for paper manufacture available in India is bamboo. The yield of pulp produced from fibrous raw material by mechanical process is about __________ percent. |
| A. | 75 |
| B. | < 10 |
| C. | > 30 |
| D. | 50 |
| Answer» C. > 30 | |
| 114. |
Molecular weight of plastics ranges from |
| A. | 5000 to 10000 |
| B. | 20000 to 250000 |
| C. | 500 to 5000 |
| D. | 106 to l09 |
| Answer» C. 500 to 5000 | |
| 115. |
The amount of benzene present in pure benzol is about __________ percent. |
| A. | 30 |
| B. | 50 |
| C. | 70 |
| D. | 90 |
| Answer» D. 90 | |
| 116. |
Raw materials for 'Solvay Process' for manufacture of the soda ash are |
| A. | salt, limestone and coke or gas. |
| B. | ammonia, salt and limestone. |
| C. | ammonia limestone and coke. |
| D. | none of these. |
| Answer» B. ammonia, salt and limestone. | |
| 117. |
'Synthesis gas' meant for the synthesis of organic compound is a variable mixture of |
| A. | N2 & H2 |
| B. | CO2 & H2 |
| C. | CO & H2 |
| D. | C & H2 |
| Answer» D. C & H2 | |
| 118. |
The most economical pulp for the production of newsprint would be the __________ pulp. |
| A. | groundwood |
| B. | sulphate |
| C. | sulphite |
| D. | semichemical |
| Answer» B. sulphate | |
| 119. |
Flash point of most vegetable oils is about __________ °C.$ |
| A. | 50 |
| B. | 100 |
| C. | 200 |
| D. | 300 |
| Answer» D. 300 | |
| 120. |
Percentage of uranium in carnotite ore found in Jadugoda (Jharkhand) is about |
| A. | 0.1 to 0.5 |
| B. | 1 to 5 |
| C. | 5 to 10 |
| D. | 15 to 25 |
| Answer» B. 1 to 5 | |
| 121. |
Which of the following is an unsaturated fatty acid ? |
| A. | Lauric acid |
| B. | Palmitic acid |
| C. | Stearic acid |
| D. | Oleic acid |
| Answer» E. | |
| 122. |
Poly tetraflouro ethylene (P.T.F.E.) is known as |
| A. | bakelite |
| B. | teflon |
| C. | celluloid |
| D. | decron |
| Answer» C. celluloid | |
| 123. |
Which of the following is not an abrasive material ? |
| A. | Bakelite |
| B. | Pumice |
| C. | Corundum |
| D. | Carborundum |
| Answer» B. Pumice | |
| 124. |
Enzymes are organic catalysts used in the __________ reactions. |
| A. | chemical |
| B. | biochemical |
| C. | photochemical |
| D. | electrochemical |
| Answer» C. photochemical | |
| 125. |
__________ of quicklime produces slaked lime. |
| A. | Hydration |
| B. | Dehydration |
| C. | Hydrogenation |
| D. | none of these |
| Answer» B. Dehydration | |
| 126. |
Systemic insecticides |
| A. | are absorbed throughout the plant. |
| B. | kill insects following external bodily contact. |
| C. | are stomach poisons. |
| D. | emit poisonous vapour. |
| Answer» B. kill insects following external bodily contact. | |
| 127. |
Production of one ton of dry paper pulp requires about __________ tons of bamboo or wood. |
| A. | 1 |
| B. | 2.5 |
| C. | 5 |
| D. | 10 |
| Answer» C. 5 | |
| 128. |
The catalyst used in shift converter is |
| A. | nickel |
| B. | vanadium |
| C. | silica gel |
| D. | alumina |
| Answer» B. vanadium | |
| 129. |
Most widely and commonly used coagulant for the removal of suspended impurities in water is |
| A. | bleaching powder |
| B. | slaked lime |
| C. | alum |
| D. | copper sulphate |
| Answer» D. copper sulphate | |
| 130. |
Phenol formaldehyde resin is used as an adhesive in making |
| A. | laminates |
| B. | card boxes |
| C. | furniture |
| D. | books |
| Answer» B. card boxes | |
| 131. |
Solvay process is used for the manufacture of |
| A. | caustic soda |
| B. | soda ash |
| C. | caustic potash |
| D. | soda lime |
| Answer» C. caustic potash | |
| 132. |
Catalyst used in the oxidation of benzene to produce maleic anhydride is |
| A. | V2O5 |
| B. | Pt |
| C. | Ni |
| D. | Cr |
| Answer» B. Pt | |
| 133. |
Portland cement consists mainly of |
| A. | CaO & SiO2 |
| B. | SiO2 & Al2O3 |
| C. | CaO & Al2O3 |
| D. | CaO & Fe2O3 |
| Answer» B. SiO2 & Al2O3 | |
| 134. |
Which of the following fuel gases contains maximum amount of carbon monoxide ? |
| A. | Coke oven gas |
| B. | Water gas |
| C. | Blast furnace gas |
| D. | L.D. converter gas |
| Answer» E. | |
| 135. |
Favourable conditions for the liquefaction of gases in general are |
| A. | high pressure & low temperature. |
| B. | low pressure & high temperature. |
| C. | high pressure & high temperature. |
| D. | low pressure & low temperature. |
| Answer» B. low pressure & high temperature. | |
| 136. |
Concentration of NaOH solution produced by diaphragm electrolytic cell is about __________ percent. |
| A. | 10 |
| B. | 25 |
| C. | 50 |
| D. | 98 |
| Answer» B. 25 | |
| 137. |
Synthetic glycerine is produced from |
| A. | toluene |
| B. | phenol |
| C. | propylene |
| D. | naphthalene |
| Answer» D. naphthalene | |
| 138. |
Insulin is an __________ drug. |
| A. | anti-malarial |
| B. | anti-TB |
| C. | antibiotic |
| D. | none of these |
| Answer» E. | |
| 139. |
The enzyme which converts starch into the disacharides maltose is |
| A. | diastase |
| B. | maltase |
| C. | yeast |
| D. | none of these |
| Answer» B. maltase | |
| 140. |
Phenolic antiseptics are added in the __________ soap. |
| A. | shaving |
| B. | medicated |
| C. | metallic |
| D. | transparent |
| Answer» C. metallic | |
| 141. |
__________ are used as corrosion inhibitor for iron & steel in aqueous solutions. |
| A. | Phosphates |
| B. | Chromates |
| C. | Sulphates |
| D. | Bi-carbonates |
| Answer» C. Sulphates | |
| 142. |
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). | |
| 143. |
Which of the following is used as a coagulant in treating turbid water ? |
| A. | Chlorine |
| B. | Ferric sulphate |
| C. | Calcium sulphate |
| D. | Activated carbon |
| Answer» C. Calcium sulphate | |
| 144. |
Polythene is a/an __________ polymerisation product. |
| A. | addition |
| B. | condensation |
| C. | thermosetting |
| D. | none of these |
| Answer» B. condensation | |
| 145. |
Main use of hydrazine is |
| A. | as a rocket fuel |
| B. | in water treatment |
| C. | as a disinfectant |
| D. | as fire retardant |
| Answer» B. in water treatment | |
| 146. |
Pick out the wrong statement pertaining to solvent extraction of oil.Rate of extraction |
| A. | decreases with decrease of thickness of the flakes. |
| B. | increases with the increasing flake size keeping the flake thickness constant. |
| C. | increases Considerably with the rise of temperature. |
| D. | decreases as the moisture content of flakes increases. |
| Answer» E. | |
| 147. |
Bio-degradable detergents |
| A. | can be readily oxidised. |
| B. | pose problem in sewerage plant. |
| C. | have an isoparaffinic structure. |
| D. | should not be used as it spoils the cloth. |
| Answer» B. pose problem in sewerage plant. | |
| 148. |
Pencillin, an antibiotic drug was discovered by |
| A. | Alexender |
| B. | Flaming |
| C. | Dr. Zivago |
| D. | none of these |
| Answer» B. Flaming | |
| 149. |
10% oleum comprises of 10% free |
| A. | SO2 |
| B. | H2SO3 |
| C. | SO3 |
| D. | H2SO4 |
| Answer» D. H2SO4 | |
| 150. |
Antibiotic |
| A. | inhibits/destroys the growth of microorganisms. |
| B. | is used as a pain reliever. |
| C. | is an antimalarial. |
| D. | is an anaesthetic. |
| Answer» B. is used as a pain reliever. | |