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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.
| 851. |
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 | |
| 852. |
Chalcopyrite is the main ore of |
| A. | Copper |
| B. | Lead |
| C. | Tin |
| D. | Iron |
| Answer» B. Lead | |
| 853. |
Haemoglobin is a/an |
| A. | Amino acid |
| B. | Biological catalyst |
| C. | Protein |
| D. | Enezyme |
| Answer» D. Enezyme | |
| 854. |
Commercial scale production of hydrogen from iron-steam reaction represented by, 3Fe + 3H₂O = Fe₃O₄ + 4H₂, 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. | |
| 855. |
Lime and soda ash are added to water to remove |
| A. | Bicarbonates & sulphates of calcium and magnesium |
| B. | Undersirable taste and odour |
| C. | Bacteria |
| D. | Its corrosiveness |
| Answer» B. Undersirable taste and odour | |
| 856. |
Gypsum is chemically |
| A. | Calcium chloride |
| B. | Potassium sulphate |
| C. | Sodium sulphate |
| D. | Calcium sulphate |
| Answer» E. | |
| 857. |
Gun powder uses |
| A. | Sulphur |
| B. | Charcoal |
| C. | Potassium nitrate |
| D. | All of the above |
| Answer» E. | |
| 858. |
Graphite is a/an |
| A. | Electrical insulator |
| B. | Allotrope of carbon |
| C. | Moderator used in nuclear reactor |
| D. | Both B and C |
| Answer» E. | |
| 859. |
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. | |
| 860. |
Glycerine can be obtained from |
| A. | Fat |
| B. | Naphthalene |
| C. | Cumene |
| D. | Sucrose |
| Answer» B. Naphthalene | |
| 861. |
Glauber's salt is chemically |
| A. | Calcium sulphate |
| B. | Potassium sulphate |
| C. | Potassium chlorate |
| D. | None of these |
| Answer» E. | |
| 862. |
Glass is |
| A. | Mainly CaO |
| B. | Subjected to galvanising |
| C. | A super cooled liquid |
| D. | All of the above |
| Answer» D. All of the above | |
| 863. |
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 | |
| 864. |
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 | |
| 865. |
Salt is added in the kettle during soap manufacture to separate |
| A. | Soap from lye |
| B. | Glycerine from lye |
| C. | The metallic soap |
| D. | The unsaponified fat from soap |
| Answer» B. Glycerine from lye | |
| 866. |
Which of the following is an endothermic reaction? |
| A. | Absorption of SO₃ in 98% H₂SO₄ |
| B. | C + H₂O = CO + H₂ |
| C. | Thermal dissociation of iron pyrites |
| D. | Both B and C |
| Answer» E. | |
| 867. |
Which of the following is a constituent of coffee? |
| A. | Caffeine |
| B. | Nicotine |
| C. | Calgon |
| D. | Lignin |
| Answer» B. Nicotine | |
| 868. |
Fusel oil is a/an |
| A. | Essential oil |
| B. | Extract from medicinal herbs |
| C. | Mixture of higher molecular weight alcohols (a by-product obtained during production of alcohol from molasses) |
| D. | None of these |
| Answer» D. None of these | |
| 869. |
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 | |
| 870. |
Very fine suspended and colloidal impurities are removed from water by a process called |
| A. | Sedimentation |
| B. | Coagulation |
| C. | Disinfection |
| D. | Softening |
| Answer» C. Disinfection | |
| 871. |
Frasch process is for |
| A. | Making oxygen |
| B. | Producing helium |
| C. | Mining sulphur |
| D. | Making nitrogen |
| Answer» D. Making nitrogen | |
| 872. |
Starting raw material for the manufacture of alum is |
| A. | Alumina |
| B. | Gypsum |
| C. | Bauxite |
| D. | Ammonium bicarbonate |
| Answer» D. Ammonium bicarbonate | |
| 873. |
Which is the most efficient absorbant for SO₃ out of the following? |
| A. | 20% oleum |
| B. | 65% oleum |
| C. | 78%H₂SO₄ |
| D. | 98%H₂SO₄ |
| Answer» E. | |
| 874. |
Which of the following is not a pyrite ore? |
| A. | Celestite |
| B. | Galena |
| C. | Gypsum |
| D. | Siderite |
| Answer» E. | |
| 875. |
Which oil is preferred for paint manufacture? |
| A. | Drying oil |
| B. | Non-drying oil |
| C. | Semi-drying oil |
| D. | Saturated oil |
| Answer» B. Non-drying oil | |
| 876. |
Vegetable oils and fats basically differ in their |
| A. | Density ranges |
| B. | Physical state |
| C. | Chemical composition |
| D. | Chemical properties |
| Answer» C. Chemical composition | |
| 877. |
Fats as compared to oils have |
| A. | More unsaturated glycerides of fatty acids |
| B. | Less unsaturated glycerides of fatty acids |
| C. | Much higher reactivity to oxygen |
| D. | Lower melting point |
| Answer» C. Much higher reactivity to oxygen | |
| 878. |
Fat splitting catalyst is |
| A. | CaCO₃ |
| B. | ZnO |
| C. | Al2O₃ |
| D. | Fe |
| Answer» C. Al2O₃ | |
| 879. |
Catalyst used during the manufacture of 'Vanaspati Ghee' is |
| A. | Zinc |
| B. | Nickel |
| C. | Platinum |
| D. | Copper |
| Answer» C. Platinum | |
| 880. |
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 | |
| 881. |
Dichloro diphenyl __________ is the full form of DDT (an insecticide). |
| A. | Tetrachloroethane |
| B. | Trichloroethane |
| C. | Tetrachloromethane |
| D. | Trichloromethane |
| Answer» C. Tetrachloromethane | |
| 882. |
Which of the following is an ore of iron? |
| A. | Galena |
| B. | Chalcopyrite |
| C. | Hematite |
| D. | Bauxite |
| Answer» D. Bauxite | |
| 883. |
Zeolite removes both temporary as well as permanent hardness of water by precipitating calcium and magnesium present in water as insoluble zeolites. Used zeolite is regenerated by flushing with the solution of |
| A. | Calcium sulphate |
| B. | Sodium chloride |
| C. | Sodium sulphate |
| D. | Magnesium chloride |
| Answer» C. Sodium sulphate | |
| 884. |
A unit operation is exemplified by the process of |
| A. | Reduction |
| B. | Desorption |
| C. | Nitration |
| D. | Combustion |
| Answer» C. Nitration | |
| 885. |
__________ is used as a flux in the smelting of copper ore like chalcopyrite. |
| A. | Coke breeze |
| B. | Lime powder |
| C. | Silica/quartz |
| D. | Dolomite |
| Answer» D. Dolomite | |
| 886. |
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 | |
| 887. |
Which of the following may be viewed as a catalyst in the manufacture of soda ash by Solvay process? |
| A. | NH? |
| B. | NaCl |
| C. | CaO |
| D. | Coke |
| Answer» B. NaCl | |
| 888. |
Which of the following is not required in the manufacture of soda ash by Solvay process? |
| A. | Ammonia |
| B. | Limestone |
| C. | Nitric acid |
| D. | None of these |
| Answer» D. None of these | |
| 889. |
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 | |
| 890. |
Cellulose content of bamboo and ideal fibrous raw material for the manufacture of paper is __________ percent. |
| A. | 10 |
| B. | 50 |
| C. | 80 |
| D. | 95 |
| Answer» C. 80 | |
| 891. |
Esterification reaction |
| A. | Produces soap |
| B. | Is reversible |
| C. | Is a reaction between an alcohol and an organic acid |
| D. | All of the above |
| Answer» E. | |
| 892. |
Temporary hardness of water can be removed by |
| A. | Addition of alum (a coagulant) |
| B. | Boiling |
| C. | Filtration (through gravity sand filter) |
| D. | Addition of lime |
| Answer» C. Filtration (through gravity sand filter) | |
| 893. |
Concentration of hydrogen peroxide is done by |
| A. | Crystallisation |
| B. | Vacuum crystallisation |
| C. | Atmospheric distillation |
| D. | Dehydration |
| Answer» C. Atmospheric distillation | |
| 894. |
Thermal pyrolysis of ethylene dichloride produces |
| A. | Trichloroethylene |
| B. | Vinyl chloride |
| C. | Ethanol amine |
| D. | Ethylene oxide |
| Answer» C. Ethanol amine | |
| 895. |
Raw materials required for the manufacture of __________ is acetylene and hydrochloric acid. |
| A. | Phthalic anhydride |
| B. | Vinyl chloride |
| C. | Maleic anhydride |
| D. | Dacron |
| Answer» C. Maleic anhydride | |
| 896. |
The process used for the manufacture of ethyl alcohol from molasses is |
| A. | Distillation |
| B. | Dehydration |
| C. | Dehydrogenation |
| D. | None of these |
| Answer» E. | |
| 897. |
Polymethyl methacrylate (PMMA) is known as |
| A. | Bakelite |
| B. | Teflon |
| C. | Perspex |
| D. | Nylon-6 |
| Answer» D. Nylon-6 | |
| 898. |
__________ 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 | |
| 899. |
Conversion of CO to CO₂ by steam in presence of a catalyst is called |
| A. | Steam reforming |
| B. | Shift conversion |
| C. | Steam gasification |
| D. | None of these |
| Answer» C. Steam gasification | |
| 900. |
Phenol formaldehyde is produced by condensation polymerisation. It is also known as |
| A. | Teflon |
| B. | Bakelite |
| C. | Polyester |
| D. | Nylon-66 |
| Answer» C. Polyester | |