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.
| 301. |
Aryl benzene sulphonate (ABS) is a |
| A. | detergent. |
| B. | plasticiser for unsaturated polyester. |
| C. | starting material for the synthesis of glycerine. |
| D. | coating ingredient for photographic film. |
| Answer» B. plasticiser for unsaturated polyester. | |
| 302. |
Main constituents of cotton fiber is |
| A. | lignin |
| B. | cellulose |
| C. | starch |
| D. | gelatine |
| Answer» C. starch | |
| 303. |
Starting raw material for the manufacture of maleic anhydride is |
| A. | n-butene |
| B. | benzene |
| C. | either (a) or (b) |
| D. | neither (a) nor (b) |
| Answer» D. neither (a) nor (b) | |
| 304. |
Stereospecific agents are exemplified by |
| A. | radiation |
| B. | supported metal oxide catalysts |
| C. | ziegler catalysts |
| D. | all (a), (b) & (c) |
| Answer» E. | |
| 305. |
Hydrogenation of oil takes place in a/an __________ reactor. |
| A. | autothermal |
| B. | trickle bed |
| C. | plug flow |
| D. | none of these |
| Answer» C. plug flow | |
| 306. |
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. | |
| 307. |
Oleum produces fumes of |
| A. | SO2 |
| B. | H2SO4 |
| C. | SO3 |
| D. | SO2 + H2SO4 |
| Answer» D. SO2 + H2SO4 | |
| 308. |
Gun powder uses |
| A. | sulphur |
| B. | charcoal |
| C. | potassium nitrate |
| D. | all (a), (b), & (c) |
| Answer» E. | |
| 309. |
Dry ice (solidified CO2) 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. | |
| 310. |
Which of the following is the second major component of cement ? |
| A. | Al2O3 |
| B. | SiO2 |
| C. | CaO |
| D. | Fe2O3 |
| Answer» C. CaO | |
| 311. |
Solvay process as compared to dual process (i.e. modified Solvay process) |
| A. | can use low grade brine. |
| B. | has less corrosion problems. |
| C. | involves higher investment in NH3 recovery units than that for crystallisation units for NH4Cl. |
| D. | both (b) and (c). |
| Answer» E. | |
| 312. |
Varnish does not contain |
| A. | thinner |
| B. | pigment |
| C. | both (a) & (b) |
| D. | neither (a) nor (b) |
| Answer» C. both (a) & (b) | |
| 313. |
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 | |
| 314. |
__________ iron is the purest form of iron. |
| A. | Cast |
| B. | Wrought |
| C. | Pig |
| D. | High silicon |
| Answer» C. Pig | |
| 315. |
Which of the following is not produced on commercial scale from sea water? |
| A. | Bromine. |
| B. | Magnesium compounds. |
| C. | Potassium compounds. |
| D. | Sodium sulphate. |
| Answer» E. | |
| 316. |
Thermal pyrolysis of ethylene dichloride produces |
| A. | trichloroethylene |
| B. | vinyl chloride |
| C. | ethanol amine |
| D. | ethylene oxide |
| Answer» C. ethanol amine | |
| 317. |
During the absorption of HCl gas in water (to produce liquid HCl), the gas is kept above dew point to |
| A. | increase the rate of absorption. |
| B. | avoid corrosion. |
| C. | reduce the cooling water circulation rate. |
| D. | none of these. |
| Answer» C. reduce the cooling water circulation rate. | |
| 318. |
Glycerine is a by-product of the __________ industry. |
| A. | soap |
| B. | detergent |
| C. | oil hydrogenation |
| D. | paint |
| Answer» B. detergent | |
| 319. |
Cumene (isopropyl benzene) is made by |
| A. | oxidation of napthalene. |
| B. | propylene alkylation of benzene. |
| C. | polymerisation of a mixture of benzene & propylene. |
| D. | none of these. |
| Answer» C. polymerisation of a mixture of benzene & propylene. | |
| 320. |
Adipic acid is an intermediate in the manufacture of |
| A. | perspex |
| B. | nylon-66 |
| C. | polystyrene |
| D. | bakelite |
| Answer» C. polystyrene | |
| 321. |
Chemical name of soda ash is |
| A. | sodium bicarbonate |
| B. | sodium thiosulphate |
| C. | potassium carbonate |
| D. | none of these |
| Answer» E. | |
| 322. |
High magnesia lime is added to hot sugar cane juice (during the manufacture of sugar) to |
| A. | flocculate the impurities. |
| B. | facilitate fast filtration. |
| C. | both (a) and (b). |
| D. | neither (a) nor (b). |
| Answer» D. neither (a) nor (b). | |
| 323. |
CaO is called |
| A. | quick lime |
| B. | slaked lime |
| C. | limestone |
| D. | calcite |
| Answer» B. slaked lime | |
| 324. |
Lurgi coal gasifier is a pressurised __________ bed reactor. |
| A. | moving |
| B. | fixed |
| C. | fluidised |
| D. | entrained |
| Answer» B. fixed | |
| 325. |
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. | |
| 326. |
Mercury cells for caustic soda manufacture, compared to diaphragm cells |
| A. | require lower initial investment. |
| B. | require more power. |
| C. | produce lower concentration NaOH. |
| D. | none of these. |
| Answer» E. | |
| 327. |
Brackish water which contains mostly dissolved salt, can be purified by the __________ process. |
| A. | reverse osmosis |
| B. | sand filter |
| C. | lime soda |
| D. | permutit |
| Answer» B. sand filter | |
| 328. |
Exothermic neutralisation reaction between caustic soda and dodecylbenzene sulphonic acid produces sodium dodecylbenzene sulphate, which is a/an |
| A. | explosive |
| B. | soap |
| C. | detergent |
| D. | analgesic drug |
| Answer» D. analgesic drug | |
| 329. |
Most commonly used rubber vulcanising agent is |
| A. | sulphur |
| B. | bromine |
| C. | platinum |
| D. | alumina |
| Answer» B. bromine | |
| 330. |
The manufacture of Kraft pulp is done by a/an __________ process. |
| A. | alkaline |
| B. | acidic |
| C. | neutral |
| D. | none of these |
| Answer» B. acidic | |
| 331. |
Which of the following is not a pyrite ore? |
| A. | Celestite |
| B. | Galena |
| C. | Gypsum |
| D. | Siderite |
| Answer» E. | |
| 332. |
In industrial nomenclature, alcohol means |
| A. | butyl alcohol |
| B. | propyl alcohol |
| C. | ethanol |
| D. | methyl alcohol |
| Answer» D. methyl alcohol | |
| 333. |
Cation exchanger is regenerated usually with |
| A. | NaOH |
| B. | H2SO4 |
| C. | hydrazine |
| D. | alum solution |
| Answer» C. hydrazine | |
| 334. |
P.T.F.E. (Poly tetra fluoro ethylene) is commercially known as |
| A. | bakelite |
| B. | neoprene |
| C. | teflon |
| D. | nylon-66 |
| Answer» D. nylon-66 | |
| 335. |
Glycerine is recovered from lye by |
| A. | evaporation followed by vacuum distillation. |
| B. | liquid extraction technique. |
| C. | extractive distillation technique. |
| D. | none of these. |
| Answer» B. liquid extraction technique. | |
| 336. |
Vanillin is a type of |
| A. | anti-pyretic drug |
| B. | food preservative |
| C. | flavour |
| D. | dye |
| Answer» D. dye | |
| 337. |
__________ is used as a catalyst in fat splitting. |
| A. | ZnO |
| B. | Ni |
| C. | V2O5 |
| D. | FeO |
| Answer» B. Ni | |
| 338. |
Pick out the true statement pertaining to water treatment. |
| A. | Slow sand filters can remove colour completely. |
| B. | Activated carbon can be used for taste & odour control without subsequent filtration. |
| C. | Application of activated carbon reduces the temporary hardness of water. |
| D. | Normally, the turbidity is removed by adding a coagulent prior to sedimentation. |
| Answer» E. | |
| 339. |
The most stable allotropic form of phosphorous is the __________ phosphorous. |
| A. | white |
| B. | black |
| C. | yellow |
| D. | red |
| Answer» C. yellow | |
| 340. |
Sand and __________ is fused at 1300°C, to produce sodium silicate.$ |
| A. | limestone |
| B. | soda ash |
| C. | coke |
| D. | sodium sulphate |
| Answer» C. coke | |
| 341. |
Carboxymethyl cellulose (CMC) is added in detergents to act as a/an |
| A. | surfactant |
| B. | builder |
| C. | optical brightening agent |
| D. | anti soil redeposition agent |
| Answer» E. | |
| 342. |
BHC (Benzene hexachloride) is made by the chlorination of benzene |
| A. | which is an addition reaction. |
| B. | which is a substitution reaction. |
| C. | in absolute dark. |
| D. | in presence of sunlight. |
| Answer» B. which is a substitution reaction. | |
| 343. |
Use of water having dissolved oxygen in boilers promotes |
| A. | corrosion |
| B. | sequestration |
| C. | scale formation |
| D. | none of these |
| Answer» B. sequestration | |
| 344. |
Oil produced by solvent extraction |
| A. | has low free fatty acid content. |
| B. | is odourless. |
| C. | both (a) &(b). |
| D. | neither (a) nor (b). |
| Answer» E. | |
| 345. |
Zeolite used in water softening process (cation exchange) is regenerated by washing with |
| A. | brine |
| B. | chloramines |
| C. | sodium bisulphite |
| D. | liquid chlorines |
| Answer» B. chloramines | |
| 346. |
High acid value of an oil or fat is an indication of |
| A. | storage under improper conditions. |
| B. | absence of unsaturation. |
| C. | its smaller molecular weight. |
| D. | none of these. |
| Answer» B. absence of unsaturation. | |
| 347. |
__________ is not a constituent of gun powder. |
| A. | Carbon |
| B. | Charcoal |
| C. | Sulphur |
| D. | Potassium nitrate |
| Answer» B. Charcoal | |
| 348. |
Which of the following is the purest form of water out of the following ? |
| A. | Underground water |
| B. | Rain water |
| C. | Well water |
| D. | Lake water |
| Answer» C. Well water | |
| 349. |
High temperature carbonisation of coal takes place at __________ °C.$ |
| A. | 2000 |
| B. | 700 |
| C. | 1100 |
| D. | < 500 |
| Answer» D. < 500 | |
| 350. |
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. | |