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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.
| 751. |
Main constituents of portland cement are calcium aluminate and |
| A. | Gypsum |
| B. | Silicates |
| C. | Sodium silicate |
| D. | Carbonates |
| Answer» C. Sodium silicate | |
| 752. |
Which of the following is not a raw material used for the manufacture of ordinary glass? |
| A. | Iron oxide |
| B. | Soda ash |
| C. | Limestone |
| D. | Silica |
| Answer» B. Soda ash | |
| 753. |
In the manufacture of sulphuric acid from elemental sulphur, the following sequence of major operations is followed : |
| A. | Furnace → converter → absorber |
| B. | Furnace → evaporator → absorber |
| C. | Furnace → converter → evaporator |
| D. | Converter → furnace → absorber |
| Answer» B. Furnace → evaporator → absorber | |
| 754. |
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 | |
| 755. |
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 of the above |
| Answer» E. | |
| 756. |
Finely ground calcium aluminate & silicate is a/an |
| A. | Cermet |
| B. | Cement |
| C. | Abrasive |
| D. | Explosive |
| Answer» C. Abrasive | |
| 757. |
Flexible foam (for mattresses) is usually made of |
| A. | PVC |
| B. | Silicone |
| C. | Polyurethanes |
| D. | Polyamides |
| Answer» D. Polyamides | |
| 758. |
Molasses is the starting material for the production of |
| A. | Alcohol |
| B. | Essential oil |
| C. | Fatty acids |
| D. | Massecuite |
| Answer» B. Essential oil | |
| 759. |
Cumene is the starting material for the production of |
| A. | Benzoic acid |
| B. | Phenol and acetone |
| C. | Isoprene |
| D. | Styrene |
| Answer» C. Isoprene | |
| 760. |
Massecuite is |
| A. | Used for paper making |
| B. | Used as a cattle feed |
| C. | Highly acidic in nature |
| D. | None of these |
| Answer» E. | |
| 761. |
Margarine is a/an |
| A. | Fat |
| B. | Explosive |
| C. | Plasticiser |
| D. | Rocket propellant |
| Answer» B. Explosive | |
| 762. |
Concentration of sulphide ores is done usually by |
| A. | Roasting |
| B. | Smelting |
| C. | Froth floatation |
| D. | Electro magnetic separation |
| Answer» D. Electro magnetic separation | |
| 763. |
Which of the following sugars is the sweetest? |
| A. | Glucose |
| B. | Fructose |
| C. | Sucrose |
| D. | Lactose |
| Answer» C. Sucrose | |
| 764. |
Chlorine gas is produced by the electrolysis of brine (NaCl solution with solid NaCl make up) in mercury electrolytic cell. Which of the following is the anodic reaction? |
| A. | Oxidation of Na+ ions |
| B. | Oxidation of Cl- ions |
| C. | Reduction of Na+ ions |
| D. | Reduction of Cl- ions |
| Answer» C. Reduction of Na+ ions | |
| 765. |
Which of the following is not a food additive? |
| A. | Citric acid |
| B. | Invertage |
| C. | Benzoyl peroxide |
| D. | Ammonium chloride |
| Answer» E. | |
| 766. |
Low purity oxygen is used for |
| A. | L.D. steel making |
| B. | Cutting and welding of metals |
| C. | Medicinal purposes |
| D. | Chemical oxidation processes |
| Answer» E. | |
| 767. |
Nylon 66 is so named because the |
| A. | Average degree of polymerisation of the polymer is 1966 |
| B. | Number of carbon atoms between two nitrogen atoms are 6 |
| C. | Number of nitrogen atoms between two carbon atoms are 6 |
| D. | Polymer was first synthesised in 1966 |
| Answer» B. Number of carbon atoms between two nitrogen atoms are 6 | |
| 768. |
Which of the following is not an insecticide? |
| A. | Hydrocyanic acid |
| B. | Nicotine |
| C. | Sodium flouride |
| D. | Hexane |
| Answer» E. | |
| 769. |
Which of the following is not an antibiotic? |
| A. | Penicillin |
| B. | Streptomycin |
| C. | Tetracyclin |
| D. | Quinine |
| Answer» E. | |
| 770. |
Which of the following is an yellow pigment? |
| A. | Titanium dioxide |
| B. | Ferrous sulphate |
| C. | Lead chromates |
| D. | Zinc sulphides |
| Answer» D. Zinc sulphides | |
| 771. |
Lithopaneis |
| A. | Explosive |
| B. | White lead |
| C. | Filter aid |
| D. | ZnS (white pigment) |
| Answer» E. | |
| 772. |
Litharge is |
| A. | Lead oxide |
| B. | Zinc oxide |
| C. | Zinc sulphide |
| D. | Cellulosic photographic material |
| Answer» B. Zinc oxide | |
| 773. |
Lindane is |
| A. | Not a fumigant |
| B. | BHC (Benzene Hexa Chloride) containing 99% γ-isomer |
| C. | A by-product of BHC manufacture |
| D. | Both B and C |
| Answer» C. A by-product of BHC manufacture | |
| 774. |
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 | |
| 775. |
Viscosity index improver (like polystrene or polyisobutylene) is added to lubricant to |
| A. | Reduce its viscosity |
| B. | Increase its viscosity |
| C. | Reduce the variation in its viscosity with temperature |
| D. | Increase the variation in its viscosity with temperature |
| Answer» D. Increase the variation in its viscosity with temperature | |
| 776. |
Electrodeposition of metals i.e. electroplating is never done on |
| A. | Metals |
| B. | Alloys |
| C. | Refractories |
| D. | Non-metals |
| Answer» D. Non-metals | |
| 777. |
Carbon content of pitch (residue of coal tar distillation) is around __________ percent. |
| A. | 70 |
| B. | 55 |
| C. | 80 |
| D. | 94 |
| Answer» E. | |
| 778. |
__________ acid is an unsaturated fatty acid. |
| A. | Palmitic |
| B. | Oleic |
| C. | Stearic |
| D. | Oxalic |
| Answer» C. Stearic | |
| 779. |
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 | |
| 780. |
Which of the following is a constituent of vinegar? |
| A. | Around 10% alcohol |
| B. | Around 1% acetic acid |
| C. | Both A and B |
| D. | Neither A nor B |
| Answer» D. Neither A nor B | |
| 781. |
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 | |
| 782. |
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 | |
| 783. |
Pick out the wrong statement pertaining to the properties of glasses. Glasses generally have |
| A. | High electrical insulation properties |
| B. | Sharp melting points |
| C. | Low co-efficient of thermal expansion |
| D. | Compressive strength much greater than their tensile strengths |
| Answer» C. Low co-efficient of thermal expansion | |
| 784. |
Portland cement consists mainly of |
| A. | CaO & SiO₂ |
| B. | SiO₂ & Al2O₃ |
| C. | CaO & Al2O₃ |
| D. | CaO & FE₂O₃ |
| Answer» B. SiO₂ & Al2O₃ | |
| 785. |
Reaction of ethylene glycol and dimethyl terephthalate (DMT) produces |
| A. | Nylon-6 |
| B. | Dacron |
| C. | Polyester |
| D. | PVC |
| Answer» C. Polyester | |
| 786. |
The yield of tar from high temperature carbonisation of dry coal is about __________ percent. |
| A. | 3 |
| B. | 12 |
| C. | 22 |
| D. | 0.3 |
| Answer» B. 12 | |
| 787. |
Concentration of NaOH solution produced by diaphragm electrolytic cell is about __________ percent. |
| A. | 10 |
| B. | 25 |
| C. | 50 |
| D. | 98 |
| Answer» B. 25 | |
| 788. |
The amount of benzene present in pure benzol is about __________ percent. |
| A. | 30 |
| B. | 50 |
| C. | 70 |
| D. | 90 |
| Answer» D. 90 | |
| 789. |
Concentration of NaOH solution produced by mercury electrolytic cell is about __________ percent. |
| A. | 10 |
| B. | 25 |
| C. | 50 |
| D. | 98 |
| Answer» D. 98 | |
| 790. |
Kopper-Totzek coal gasifier |
| A. | Can give ammonia synthesis gas (H₂ + N₂) |
| B. | Is a moving bed reactor |
| C. | Cannot use coking coal |
| D. | Operate at very high pressure |
| Answer» B. Is a moving bed reactor | |
| 791. |
Commonly used glass is known as the __________ glass. |
| A. | Flint |
| B. | Hard |
| C. | Pyrex |
| D. | Soda |
| Answer» E. | |
| 792. |
Coke oven gas consists mainly of |
| A. | H₂, & CH₄ |
| B. | CO, & CO₂ |
| C. | H₂, & CO |
| D. | CH₄, & CO |
| Answer» B. CO, & CO₂ | |
| 793. |
Kaoline is a/an |
| A. | Refractory material |
| B. | Synthetic resin |
| C. | Artificial abrasive |
| D. | Blue pigment |
| Answer» B. Synthetic resin | |
| 794. |
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 | |
| 795. |
__________ is the major constituent of the Portland cement. |
| A. | Calcium carbonate |
| B. | Calcium oxide |
| C. | Tricalcium silicate |
| D. | Calcium sulphate |
| Answer» D. Calcium sulphate | |
| 796. |
Sulphuric acid completely saturated with sulphur trioxide is called |
| A. | Concentrated sulphuric acid |
| B. | Oleum |
| C. | Sulphurous acid |
| D. | Dilute sulphuric acid |
| Answer» B. Oleum | |
| 797. |
Hollander beater used during paper pulp manufacture does not facilitate the __________ of fibre. |
| A. | Cutting |
| B. | Fibrillation |
| C. | Hydration |
| D. | Strengthening |
| Answer» E. | |
| 798. |
The terminology 'BTX' used in coal tar distillation industry refers to |
| A. | Benzol-toluol-xylol |
| B. | Benzol-toluene-xylene |
| C. | Benzene-toluol-xylol |
| D. | Benzene-toluene-xylene |
| Answer» E. | |
| 799. |
Solvay process is used for the manufacture of |
| A. | Caustic soda |
| B. | Soda ash |
| C. | Caustic potash |
| D. | Soda lime |
| Answer» C. Caustic potash | |
| 800. |
Deacon's method is used for the manufacture of |
| A. | Glauber's salt |
| B. | Common salt |
| C. | Chlorine |
| D. | Graphite electrode |
| Answer» D. Graphite electrode | |