MCQOPTIONS
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MCQOPTIONS
This section includes 565 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. |
Boiling of water containing temporary hardness produces? |
| A. | CO‚ÇÇ |
| B. | CaSO‚ÇÑ |
| C. | CaHCO‚ÇÉ |
| D. | None of these |
| Answer» B. CaSO‚Äö√á√ë | |
| 502. |
Naphthols are derivates of? |
| A. | Methyl amine |
| B. | Naphthalene |
| C. | Phenol |
| D. | Xylene |
| Answer» C. Phenol | |
| 503. |
Commercially ethylene is produced from naphtha by? |
| A. | Catalytic cracking |
| B. | Catalytic dehydrogenation |
| C. | Pyrolysis |
| D. | Hydrocracking |
| Answer» E. | |
| 504. |
What products do we get on electrolysis of saturated brine using steel cathode and graphite anode in an electrolytic cell?? |
| A. | Cl‚ÇÇ & Na |
| B. | Cl‚ÇÇ & H‚ÇÇ |
| C. | O‚ÇÇ & H‚ÇÇ |
| D. | Cl‚ÇÇ, H‚ÇÇ & NaOH solution |
| Answer» E. | |
| 505. |
Sodium carbonate (soda ash) is not used in the manufacture of? |
| A. | Fire extinguishers |
| B. | Sugar |
| C. | Baking powder |
| D. | Detergents |
| Answer» E. | |
| 506. |
In an integrated steel plant, NH‚ÇÉ present in coke oven gas is normally recovered as? |
| A. | (NH‚ÇÑ)2SO‚ÇÑ |
| B. | NH‚ÇÑCl |
| C. | (NH‚ÇÑ)2 NO‚ÇÉ |
| D. | Liquid NH‚ÇÉ |
| Answer» B. NH‚Äö√á√ëCl | |
| 507. |
Oxidation of SO‚ÇÇ to SO‚ÇÉ is favoured by? |
| A. | Low temperature and low pressure |
| B. | Low temperature and high pressure |
| C. | High temperature and low pressure |
| D. | High temperature and high pressure |
| Answer» C. High temperature and low pressure | |
| 508. |
Oil is a/an? |
| A. | Mixture of glycerides |
| B. | Mixture of glycerides of fatty acids |
| C. | Solid at normal temperature |
| D. | Ester of alcohols other than glycerine |
| Answer» C. Solid at normal temperature | |
| 509. |
Which one of the following is not an elastomer?? |
| A. | Polyisoperene |
| B. | Neoprene |
| C. | Nitrile-butadiene |
| D. | None of these |
| Answer» E. | |
| 510. |
Removal of dirt/soil by soaps or detergent does not involve the __________ of soil.? |
| A. | Emulsification |
| B. | Dispersion |
| C. | Precipitation |
| D. | Wetting |
| Answer» D. Wetting | |
| 511. |
Which of the following is a co-product during the manufacture of caustic soda by electrolysis of brine?? |
| A. | Na‚ÇÇCO‚ÇÉ |
| B. | NaHCO‚ÇÉ |
| C. | H‚ÇÇ |
| D. | None of these |
| Answer» D. None of these | |
| 512. |
Liquefaction of gases can not be done by? |
| A. | Exchange of heat with colder stream |
| B. | Adiabatic expansion through a throttle valve (Joule-Thomson expansion) |
| C. | Merely compressing it beyond critical pressure |
| D. | Adiabatic expansion against a piston or in a turbine |
| Answer» D. Adiabatic expansion against a piston or in a turbine | |
| 513. |
Fumigant insecticides? |
| A. | Kill insects, when they eat it |
| B. | Emit poisonous vapour |
| C. | Are absorbed throughout the plant |
| D. | None of these |
| Answer» C. Are absorbed throughout the plant | |
| 514. |
Which of the following is not a pyrite ore?? |
| A. | Celestite |
| B. | Galena |
| C. | Gypsum |
| D. | Siderite |
| Answer» E. | |
| 515. |
Catalyst used during the manufacture of 'Vanaspati Ghee' is? |
| A. | Zinc |
| B. | Nickel |
| C. | Platinum |
| D. | Copper |
| Answer» C. Platinum | |
| 516. |
Molecular weights of polymers are in the range of? |
| A. | 10² - 10² |
| B. | 10⁵ - 10⁹ |
| C. | 10² - 10⁷ |
| D. | 10‚Åπ - 10¬π¬π |
| Answer» D. 10‚Äö√ÖœÄ - 10¬¨œÄ¬¨œÄ | |
| 517. |
Commercial scale production of hydrogen from iron-steam reaction represented by, 3Fe + 3H‚ÇÇO = Fe‚ÇÉO‚ÇÑ + 4H‚ÇÇ, is not practised, as it is? |
| A. | A slow reaction |
| B. | A discontinuous reaction (requiring regeneration of iron by water gas intermittently) |
| C. | Still in development stage (by employing fluidised bed technique) |
| D. | All of the above |
| Answer» E. | |
| 518. |
Glycerine is not used in the? |
| A. | Manufacture of explosive |
| B. | Conditioning and humidification of tobacco |
| C. | Manufacture of pharmaceuticals |
| D. | None of these |
| Answer» E. | |
| 519. |
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 | |
| 520. |
The process used for the manufacture of ethyl alcohol from molasses is? |
| A. | Distillation |
| B. | Dehydration |
| C. | Dehydrogenation |
| D. | None of these |
| Answer» E. | |
| 521. |
Thermosetting plastic materials? |
| A. | Can be repeatedly melted |
| B. | Is useful for melt casting |
| C. | Can not be melted after forming |
| D. | Is useful for spinning |
| Answer» D. Is useful for spinning | |
| 522. |
Hydrogenation of oil does not? |
| A. | Remove double bonds |
| B. | Raise its melting point |
| C. | Improve its resistance to oxidation |
| D. | None of these |
| Answer» E. | |
| 523. |
Hard water? |
| A. | Does not affect the lather formation by soap |
| B. | Is not unfit for drinking purpose |
| C. | Pollutes the water stream |
| D. | All of the above |
| Answer» C. Pollutes the water stream | |
| 524. |
Detergent is produced by the sulphonation of dodecyl benzene, which is an __________ reaction.? |
| A. | Endothermic |
| B. | Exothermic |
| C. | Irreversible |
| D. | Both B and C |
| Answer» E. | |
| 525. |
Stereospecific agents are exemplified by? |
| A. | Radiation |
| B. | Supported metal oxide catalysts |
| C. | Ziegler catalysts |
| D. | All of the above |
| Answer» E. | |
| 526. |
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 | |
| 527. |
Coloured glass is obtained by mixing of colored salts. Addition of __________ oxide is done to impart greenish blue color to the glass.? |
| A. | Chromium |
| B. | Arsenic |
| C. | Copper |
| D. | Mangnese |
| Answer» D. Mangnese | |
| 528. |
Neoprene is chemically known as? |
| A. | Polybutadiene |
| B. | Styrene butadiene rubber (SBR) |
| C. | Polyurathane |
| D. | Polychloroprene |
| Answer» E. | |
| 529. |
Most commonly used rubber vulcanising agent is? |
| A. | Sulphur |
| B. | Bromine |
| C. | Platinum |
| D. | Alumina |
| Answer» B. Bromine | |
| 530. |
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 | |
| 531. |
Which of the following is an yellow pigment? |
| A. | Titanium dioxide |
| B. | Ferrous sulphate |
| C. | Lead chromates |
| D. | Zinc sulphides |
| Answer» D. Zinc sulphides | |
| 532. |
Which of the following is not produced commercially from sea water? |
| A. | Magnesium & potassium compounds |
| B. | Common salt |
| C. | Bromine |
| D. | Iodine |
| Answer» E. | |
| 533. |
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 | |
| 534. |
CaSO‚ÇÑ .1/2 H‚ÇÇO is known as$ |
| A. | Blue vitriol |
| B. | Plaster of Paris |
| C. | Gypsum |
| D. | Zeolite |
| Answer» C. Gypsum | |
| 535. |
Ca(OH)‚ÇÇ is called$ |
| A. | Quicklime |
| B. | Slaked lime |
| C. | Limestone |
| D. | Gypsum |
| Answer» C. Limestone | |
| 536. |
High temperature carbonisation of coal takes place at __________ °C.$ |
| A. | 2000 |
| B. | 700 |
| C. | 1100 |
| D. | < 500 |
| Answer» D. < 500 | |
| 537. |
In contact process, SO‚ÇÉ is absorbed in 97% H‚ÇÇSO‚ÇÑ and not in water, because$ |
| A. | SO‚ÇÉ gas is sparingly soluble in water |
| B. | Water forms an acid mist, which is difficult to absorb |
| C. | The purity of acid is affected |
| D. | Scale formation in the absorber is to be avoided |
| Answer» C. The purity of acid is affected | |
| 538. |
For the hydrogenation of oils (i) __________ is commonly used as catalyst and (ii) __________ is a catalyst poison. |
| A. | (i) platinum (ii) sulphur |
| B. | (i) palladium (ii) oxygen |
| C. | (i) nickel (ii) sulphur |
| D. | (i) nickel (ii) oxygen |
| Answer» D. (i) nickel (ii) oxygen | |
| 539. |
Refractory bricks having high thermal conductivity is desirable, when it is to be used in the |
| A. | L.D. converter |
| B. | Blast furnace |
| C. | Rotary kiln |
| D. | Recuperator |
| Answer» E. | |
| 540. |
Vinyl chloride (CH‚ÇÇ = CH.Cl) is produced by the thermal pyrolysis of ethylene dichloride at a pressure & temperature of$ |
| A. | 4 kgf/cm² & 500°C |
| B. | 10 kgf/cm² & 1000°C |
| C. | 40 kg/cm² & 200°C |
| D. | 100 kgi/cm² & 500°C |
| Answer» B. 10 kgf/cm¬¨‚⧠& 1000¬¨‚àûC | |
| 541. |
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 | |
| 542. |
A mineral is termed as 'ore', if |
| A. | A metal can be economically extracted from it |
| B. | It contains ‚â• 40% metal |
| C. | The metal present in it is costly |
| D. | All of the above |
| Answer» B. It contains ‚Äö√¢‚Ä¢ 40% metal | |
| 543. |
Which is a high grade pulp? |
| A. | Rag pulp |
| B. | Mechanical pulp |
| C. | Sulphate pulp |
| D. | Sulphite pulp |
| Answer» D. Sulphite pulp | |
| 544. |
Alum [Al2(SO‚ÇÑ)‚ÇÉ] is used as a coagulant in water treatment to remove$ |
| A. | Colour |
| B. | Turbidity |
| C. | Bacteria |
| D. | All of the above |
| Answer» E. | |
| 545. |
With increase in temperature, the equilibrium constant at constant pressure (Kp) for oxidation of sulphur dioxide |
| A. | Increases |
| B. | Increases linearly |
| C. | Decreases |
| D. | Decreases linearly |
| Answer» D. Decreases linearly | |
| 546. |
Argon is the third largest constituent of air (followed by N‚ÇÇ & O‚ÇÇ). Its percentage by volume in air is$ |
| A. | 0.14 |
| B. | 0.34 |
| C. | 0.94 |
| D. | 1.4 |
| Answer» D. 1.4 | |
| 547. |
Which of the following is an unsaturated fatty acid? |
| A. | Lauric acid |
| B. | Palmitic acid |
| C. | Stearic acid |
| D. | Oleic acid |
| Answer» E. | |
| 548. |
Na‚ÇÇCO‚ÇÉ.10H‚ÇÇO is called$ |
| A. | Washing soda |
| B. | Soda ash |
| C. | Slaked lime |
| D. | Quicklime |
| Answer» B. Soda ash | |
| 549. |
Which of the following is not present in bagasse fibre? |
| A. | Cellulose |
| B. | Lignin |
| C. | Pentogens |
| D. | None of these |
| Answer» E. | |
| 550. |
Dry ice (solidified CO‚ÇÇ) 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 | |