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.
| 501. |
CaO is called__________________? |
| A. | Quick lime |
| B. | Slaked lime |
| C. | Limestone |
| D. | Calcite |
| Answer» B. Slaked lime | |
| 502. |
Calgon used in water treatment is chemically ____________________? |
| A. | Sodium phosphate |
| B. | Sodium hexametaphosphate |
| C. | Calcium phosphate |
| D. | Tricresyl phosphate |
| Answer» C. Calcium phosphate | |
| 503. |
Calcination of limestone is not done in a ______________ kiln for producing lime ? |
| A. | Vertical shaft |
| B. | Rotary |
| C. | Fluidised bed |
| D. | Fixed bed |
| Answer» E. | |
| 504. |
Calcination of gypsum produces__________________? |
| A. | Plaster of Paris |
| B. | Salt cake |
| C. | Nitre cake |
| D. | Lime |
| Answer» B. Salt cake | |
| 505. |
Calcareous & argillaceous materials are used in the manufacture of ___________________? |
| A. | Lead |
| B. | Cement |
| C. | Carbon disulphide |
| D. | None of these |
| Answer» C. Carbon disulphide | |
| 506. |
CaCl(OCl) is the chemical formula of___________________? |
| A. | Hypo |
| B. | Bleaching powder |
| C. | Plaster of Paris |
| D. | Aqua regia |
| Answer» C. Plaster of Paris | |
| 507. |
Builders are added in soap to act as___________________? |
| A. | Cleaning power booster |
| B. | Anti-redeposition agent |
| C. | Corrosion inhibitor |
| D. | Fabric brightener |
| Answer» B. Anti-redeposition agent | |
| 508. |
Bromine is used in the preparation of___________________? |
| A. | Fire extinguishing compounds |
| B. | Fire proofing agents |
| C. | Dyes and antiknock compounds |
| D. | All A , B. and C. |
| Answer» E. | |
| 509. |
Bromine content in sea water may be around _________________ ppm? |
| A. | 70 |
| B. | 640 |
| C. | 1875 |
| D. | 2500 |
| Answer» B. 640 | |
| 510. |
Bromides contained in hot mother liquor is treated with ______________ during manufacture of bromine from sea water ? |
| A. | SO3 |
| B. | Cl2 |
| C. | NH3 |
| D. | SO2 |
| Answer» C. NH3 | |
| 511. |
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 | |
| 512. |
Bordeaux mixture is a/an________________? |
| A. | Fertiliser |
| B. | Inorganic fungicide |
| C. | Insecticide |
| D. | Explosive |
| Answer» C. Insecticide | |
| 513. |
Blue vitriol is chemically___________________? |
| A. | Copper sulphate |
| B. | Ferrous sulphate |
| C. | Copper nitrate |
| D. | Aluminium sulphate |
| Answer» B. Ferrous sulphate | |
| 514. |
Blue colour is imparted to glass by the addition of__________________? |
| A. | FeSO4 |
| B. | PbO |
| C. | CaO |
| D. | NaOH |
| Answer» D. NaOH | |
| 515. |
Bleaching powder (chemically known as calcium chloro hypochlorite) is commercially produced by the action of chlorine on ____________________? |
| A. | Slaked lime |
| B. | Soda lime |
| C. | Calcium perchlorate |
| D. | None of these |
| Answer» B. Soda lime | |
| 516. |
Bleaching of paper pulp is done with__________________? |
| A. | Activated clay |
| B. | Bromine |
| C. | Chlorine or chlorine dioxide |
| D. | Magnesium sulphite |
| Answer» D. Magnesium sulphite | |
| 517. |
Bleaching action of bleaching powder is due to its _____________ properties ? |
| A. | Reducing |
| B. | Oxidising |
| C. | Disinfecting |
| D. | None of these |
| Answer» C. Disinfecting | |
| 518. |
Black liquor is converted into white liquor by __________________________? |
| A. | Evaporation and burning the concentrate followed by causticisation of products |
| B. | Multi-effect evaporation only |
| C. | Selective liquid extraction |
| D. | Extractive distillation |
| Answer» B. Multi-effect evaporation only | |
| 519. |
Bitterns is a/an_________________? |
| A. | Unsaturated fat |
| B. | Starting material for the production of iodine |
| C. | By-product of chlor-alkali industry |
| D. | None of these |
| Answer» E. | |
| 520. |
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 | |
| 521. |
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 | |
| 522. |
Basic oxide is absent in ___________________ glass? |
| A. | Flint |
| B. | Pyrex |
| C. | Quartz |
| D. | All A, B. & C |
| Answer» D. All A, B. & C | |
| 523. |
Baking soda is chemically represented by__________________? |
| A. | Na2CO3 |
| B. | NaHCO3 |
| C. | Na2CO3.H2O |
| D. | Na2CO3.10H2O |
| Answer» C. Na2CO3.H2O | |
| 524. |
Bakelite is _________________? |
| A. | Same as Polytetrafluoroethylene (PTFE) |
| B. | An inorganic polymer |
| C. | Same as thermosetting phenol-formaldehyde |
| D. | Not a polymer |
| Answer» D. Not a polymer | |
| 525. |
Bakelite is chemically known as_____________________? |
| A. | Polyvinyl chloride (PVC) |
| B. | Polybutadiene |
| C. | Phenol formaldehyde |
| D. | Polyurethane |
| Answer» D. Polyurethane | |
| 526. |
Average sulphur content in Indian pyrites is about _________________ percent? |
| A. | 15 |
| B. | 35 |
| C. | 55 |
| D. | 70 |
| Answer» C. 55 | |
| 527. |
At very high concentration of enzymes, the rate of fermentation chemical reaction is _____________ the concentration of reactants? |
| A. | Independent of |
| B. | Directly proportional to |
| C. | Inversely proportional to |
| D. | Proportional to the square of |
| Answer» B. Directly proportional to | |
| 528. |
At a given temperature, the equilibrium yield of SO3 obtained from the oxidation of SO2 is proportional to (where, P = pressure of the system) ? |
| A. | P |
| B. | √P |
| C. | P2 |
| D. | 1/P |
| Answer» C. P2 | |
| 529. |
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 | |
| 530. |
Argon is the third largest constituent of air (followed by N2 & O2). Its percentage by volume in air is___________________? |
| A. | 0.14 |
| B. | 0.34 |
| C. | 0.94 |
| D. | 1.4 |
| Answer» D. 1.4 | |
| 531. |
____________ are used as corrosion inhibitor for iron & steel in aqueous solutions ? |
| A. | Phosphates |
| B. | Chromates |
| C. | Sulphates |
| D. | Bi-carbonates |
| Answer» C. Sulphates | |
| 532. |
______________ are added in lacquers to remove film brittleness and to improve adhereness? |
| A. | Film forming materials |
| B. | Plasticisers |
| C. | Diluents |
| D. | Solvents |
| Answer» C. Diluents | |
| 533. |
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 | |
| 534. |
Anion exchanger is regenerated usually with ____________________? |
| A. | NaOH |
| B. | H2SO4 |
| C. | Hydrazine |
| D. | Alum solution |
| Answer» B. H2SO4 | |
| 535. |
Analgesic drugs are__________________? |
| A. | Pain relievers |
| B. | Antibiotics |
| C. | Used in the treatment of T.B. |
| D. | Used in the treatment of typhoid |
| Answer» B. Antibiotics | |
| 536. |
An oil is converted into fat by its___________________? |
| A. | Hydrogenation |
| B. | Hydrolysis |
| C. | Hydrocracking |
| D. | Hydration |
| Answer» B. Hydrolysis | |
| 537. |
An alkali metal salt of Palmitic acid is known as _____________________? |
| A. | Soap |
| B. | Metallic soap |
| C. | Detergent |
| D. | Alkaloid |
| Answer» C. Detergent | |
| 538. |
Alum is commercially produced from___________________? |
| A. | Gypsum |
| B. | Feldspar |
| C. | Galena |
| D. | Bauxite |
| Answer» E. | |
| 539. |
Alum [Al2(SO4)3] is used as a coagulant in water treatment to remove____________________? |
| A. | Colour |
| B. | Turbidity |
| C. | Bacteria |
| D. | All A , B. and C. |
| Answer» E. | |
| 540. |
All enzymes are made of______________________? |
| A. | Fats |
| B. | Carbohydrates |
| C. | Proteins |
| D. | Amino acids |
| Answer» D. Amino acids | |
| 541. |
Alkylbenzene sulfonate (ABS) is a____________________? |
| A. | Detergent |
| B. | Rubber |
| C. | Pesticide |
| D. | Polyester |
| Answer» B. Rubber | |
| 542. |
Alcohol percentage in molasses may be around _____________________? |
| A. | 10 |
| B. | 40 |
| C. | 70 |
| D. | 85 |
| Answer» C. 70 | |
| 543. |
Alcohol is produced by the___________________? |
| A. | Oxidation of an aldehyde |
| B. | Hydrolysis of an ether |
| C. | Esterification of a fat |
| D. | None of these |
| Answer» C. Esterification of a fat | |
| 544. |
Alcohol content in freshly prepared natural and fortified wine may be respectively around ______________ percent ? |
| A. | 7-14 and 14-30 |
| B. | 7-14 and 40-50 |
| C. | 14 – 30 and 40-50 |
| D. | 10 – 20 and 40 – 50 |
| Answer» B. 7-14 and 40-50 | |
| 545. |
Air used in aerobic fermentation must be sterilized, otherwise the ___________________? |
| A. | Recovery of product will be difficult |
| B. | Contamination of pure culture would result |
| C. | Uniformity of product cannot be achieved |
| D. | None of these |
| Answer» C. Uniformity of product cannot be achieved | |
| 546. |
Adipic acid is an intermediate in the manufacture of________________? |
| A. | Perspex |
| B. | Nylon-66 |
| C. | Polystyrene |
| D. | Bakelite |
| Answer» C. Polystyrene | |
| 547. |
Addition of calcium oxide to water produces___________________? |
| A. | Exothermic heat |
| B. | Hissing sound |
| C. | Slaked lime |
| D. | All A , B. & C . |
| Answer» E. | |
| 548. |
Acrylonitrile is mainly used in the _____________ industry? |
| A. | Polymer |
| B. | Printing |
| C. | Dyeing |
| D. | Photographic |
| Answer» D. Photographic | |
| 549. |
________________ acid is the main constituent of cotton seed oil ? |
| A. | Acetic |
| B. | Linoleic |
| C. | Palmitic |
| D. | Oleic |
| Answer» C. Palmitic | |
| 550. |
________________ acid is an unsaturated fatty acid ? |
| A. | Palmitic |
| B. | Oleic |
| C. | Stearic |
| D. | Oxalic |
| Answer» C. Stearic | |