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.
| 51. |
Zeolite is used in the ____________________ ? |
| A. | Water treatment |
| B. | Glass manufacture |
| C. | Hydrogenation of fatty oil as a catalyst |
| D. | Development of exposed photographic plate |
| Answer» B. Glass manufacture | |
| 52. |
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 | |
| 53. |
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 | |
| 54. |
Which of the following is the most adverse factor challenging the choice of mercury electrolytic cell process for the production of caustic soda ? |
| A. | High cost of mercury |
| B. | High specific gravity of mercury |
| C. | Non-availability of high purity mercury |
| D. | Pollution of water stream by mercury |
| Answer» E. | |
| 55. |
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. | |
| 56. |
Which of the following is not an insecticide ? |
| A. | Hydrocyanic acid |
| B. | Nicotine |
| C. | Sodium fluoride |
| D. | Hexane |
| Answer» E. | |
| 57. |
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 | |
| 58. |
Which of the following is not a pyrite ore ? |
| A. | Celestite |
| B. | Galena |
| C. | Gypsum |
| D. | Siderite |
| Answer» E. | |
| 59. |
Which of the following is not a food additive ? |
| A. | Citric acid |
| B. | Invertage |
| C. | Benzoyl peroxide |
| D. | Ammonium chloride |
| Answer» E. | |
| 60. |
Which of the following is an organometallic compound ? |
| A. | Isopropyl alcohol |
| B. | Tetra-ethyl lead |
| C. | Zeolite |
| D. | Cumene |
| Answer» C. Zeolite | |
| 61. |
Which of the following is a disaccharide ? |
| A. | Sucrose |
| B. | Glucose |
| C. | Starch |
| D. | Maltose |
| Answer» B. Glucose | |
| 62. |
Which of the following is a bleaching agent added in the detergents to facilitate removal of stains caused due to blood, tea etc ? |
| A. | Sodium silicate |
| B. | Sodium borate |
| C. | Sodium tripolyphosphate (STPP) |
| D. | Caustic soda |
| Answer» C. Sodium tripolyphosphate (STPP) | |
| 63. |
Which is the most efficient absorbent for SO3 out of the following ? |
| A. | 20% oleum |
| B. | 65% oleum |
| C. | 78% H2SO4 |
| D. | 98% H2SO4 |
| Answer» E. | |
| 64. |
Which glass is usually used in optical work ? |
| A. | Lead glass |
| B. | High silica (borosilicate) glass |
| C. | Photo-sensitive glass |
| D. | Fibre glass |
| Answer» D. Fibre glass | |
| 65. |
Which form of sulphur is the most stable at room temperature ? |
| A. | Plastic |
| B. | Monoclinic |
| C. | Rhombic |
| D. | Flowers of sulphur |
| Answer» D. Flowers of sulphur | |
| 66. |
Wet chlorine gas produced during electrolysis of brine is dehydrated by__________________? |
| A. | Spraying 66° Be H2SO4 counter current to the flow of the gas |
| B. | Passing it through a bed of diatomaceous earth |
| C. | Passing it through a bed of silica gel |
| D. | None of these |
| Answer» B. Passing it through a bed of diatomaceous earth | |
| 67. |
Wax is a___________________? |
| A. | Mixture of glycerides |
| B. | Mixture of esters of polyhydric alcohols excepting glycerine |
| C. | Liquid at room temperature |
| D. | Mixture of glycerides of fatty acids |
| Answer» C. Liquid at room temperature | |
| 68. |
Washing soda is chemically represented by _________________? |
| A. | Na2CO3 |
| B. | Na2CO3.H2O |
| C. | Na2CO3.10H2O |
| D. | NaHCO3 |
| Answer» D. NaHCO3 | |
| 69. |
Vulcanisation of rubber____________________? |
| A. | Decreases its tensile strength |
| B. | Increases its ozone & oxygen reactivity |
| C. | Increases its oil & solvent resistance |
| D. | Converts its plasticity into elasticity |
| Answer» E. | |
| 70. |
Viscose rayon is chemically___________________? |
| A. | Cellulose nitrate |
| B. | Regenerated cellulose nitrate |
| C. | Cellulose acetate |
| D. | Regenerated cellulose acetate |
| Answer» E. | |
| 71. |
Viscose rayon is__________________? |
| A. | Cellulose nitrate |
| B. | Regenerated cellulose nitrate |
| C. | Regenerated cellulose acetate |
| D. | None of these |
| Answer» E. | |
| 72. |
Vinyl chloride (CH2 = 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 kgf/cm2 & 500°C |
| Answer» B. 10 kgf/cm2 & 1000°C | |
| 73. |
Very dilute solutions are generally used in fermentation reactions for which the optimum temperature range is ____________ °C? |
| A. | -5 to 0 |
| B. | 5 to 10 |
| C. | 30 to 50 |
| D. | 75 to 80 |
| Answer» D. 75 to 80 | |
| 74. |
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 | |
| 75. |
Vegetable oils contain large quantity of glycerides of unsaturated acids. When the vegetable oils contain high amount of saturated fatty acids, it is termed as ____________________ oil? |
| A. | Drying |
| B. | Semi-drying |
| C. | Non-drying |
| D. | None of these |
| Answer» D. None of these | |
| 76. |
Varnish does not contain____________________? |
| A. | Pigment |
| B. | Thinner |
| C. | Dryer |
| D. | Anti-skimming agent |
| Answer» B. Thinner | |
| 77. |
Varnish does not contain_______________? |
| A. | Thinner |
| B. | Pigment |
| C. | Both A. & B. |
| D. | Neither A. nor B. |
| Answer» C. Both A. & B. | |
| 78. |
Vanillin is a type of____________________? |
| A. | Anti-pyretic drug |
| B. | Food preservative |
| C. | Flavour |
| D. | Dye |
| Answer» D. Dye | |
| 79. |
Use of water having dissolved oxygen in boilers promotes___________________? |
| A. | Corrosion |
| B. | Sequestration |
| C. | Scale formation |
| D. | None of these |
| Answer» B. Sequestration | |
| 80. |
Use of hydrated lime in water treatment_________________? |
| A. | Before filtration, reduces the bacterial load on filters |
| B. | After filtration, combats the corrosiveness of water due to the presence of O2 & CO2 |
| C. | Is to adjust the pH value |
| D. | All A , B. and C. |
| Answer» E. | |
| 81. |
Use of chlorine in the treatment of sewage_________________? |
| A. | Helps in grease separation |
| B. | Increases the biological oxygen demand (BOD) |
| C. | Causes bulking of activated sludge |
| D. | Aids in flocculation |
| Answer» B. Increases the biological oxygen demand (BOD) | |
| 82. |
Unsaturated oils compared to saturated oils have___________________? |
| A. | Lower melting point & higher reactivity to oxygen |
| B. | Higher melting point & higher reactivity to oxygen |
| C. | Lower melting point & lower reactivity to oxygen |
| D. | Higher melting point & lower reactivity to oxygen |
| Answer» B. Higher melting point & higher reactivity to oxygen | |
| 83. |
Ultimate analysis of coal determines its _______________________ content? |
| A. | Carbon, hydrogen, nitrogen & sulphur |
| B. | Carbon, ash, sulphur & nitrogen |
| C. | Carbon, sulphur, volatile matter & ash |
| D. | Carbon, volatile matter, ash & moisture |
| Answer» D. Carbon, volatile matter, ash & moisture | |
| 84. |
Type of glass used in optical work is the ___________________ glass? |
| A. | Soda-lime |
| B. | Fibre |
| C. | Lead |
| D. | Borosilicate |
| Answer» D. Borosilicate | |
| 85. |
Triple superphosphate is manufactured by reacting ____________________? |
| A. | Phosphate rock with phosphoric acid |
| B. | Phosphate rock with sulphuric acid |
| C. | Phosphate rock with nitric acid |
| D. | Ammonium phosphate with phosphoric acid |
| Answer» B. Phosphate rock with sulphuric acid | |
| 86. |
Trinitrotoluene (TNT), an explosive, is made by the nitration of ____________________? |
| A. | Nitrobenzene |
| B. | Toluene |
| C. | Nitrotoluene |
| D. | Benzene |
| Answer» C. Nitrotoluene | |
| 87. |
Trinitro-toluene (TNT) is _________________ ? |
| A. | Used in glycerine manufacture |
| B. | An explosive |
| C. | Used in dye manufacture |
| D. | None of these |
| Answer» C. Used in dye manufacture | |
| 88. |
Transportation of 35% oleum during winter suffers from the problem of freezing, which can be overcome by the addition of small quantity of_____________________? |
| A. | Nitric acid |
| B. | Hydrochloric acid |
| C. | Methyl alcohol |
| D. | Formic acid |
| Answer» B. Hydrochloric acid | |
| 89. |
Transparent soaps (e.g. Pears) are____________________? |
| A. | Usually soft soap (made from coconut oil) in which cane sugar & alcohol are added and finally washed with methylated spirit to achieve transparency |
| B. | Metallic soaps with frothing agent and free Stearic acid to achieve transparency |
| C. | Metallic soaps with frothing agent from which glycerine has not been recovered |
| D. | None of these |
| Answer» B. Metallic soaps with frothing agent and free Stearic acid to achieve transparency | |
| 90. |
Titanium dioxide is a/an ___________________ colour pigment? |
| A. | White |
| B. | Black |
| C. | Yellow |
| D. | Blue |
| Answer» B. Black | |
| 91. |
Thorium is mainly used _______________? |
| A. | For the manufacture of gas mantles |
| B. | As a fissile fuel in a nuclear reactor |
| C. | In the manufacture of hydrogen bomb |
| D. | In the treatment of cancer |
| Answer» B. As a fissile fuel in a nuclear reactor | |
| 92. |
Thermosetting plastic materials____________________? |
| A. | Can be repeatedly melted |
| B. | Is useful for melt casting |
| C. | Cannot be melted after forming |
| D. | Is useful for spinning |
| Answer» D. Is useful for spinning | |
| 93. |
Thermosetting materials ______________________? |
| A. | Are cross-linked molecules |
| B. | Soften on application of heat |
| C. | Are solvent soluble |
| D. | None of these |
| Answer» B. Soften on application of heat | |
| 94. |
Thermoplastic materials_____________________? |
| A. | Do not soften on application of heat |
| B. | Are heavily branched molecules |
| C. | Are solvent insoluble |
| D. | None of these |
| Answer» E. | |
| 95. |
Thermal pyrolysis of ethylene dichloride produces___________________? |
| A. | Trichloroethylene |
| B. | Vinyl chloride |
| C. | Ethanol amine |
| D. | Ethylene oxide |
| Answer» C. Ethanol amine | |
| 96. |
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 | |
| 97. |
The type of high refractive index glass used in optical instruments is _____________ glass? |
| A. | Pyrex |
| B. | Flint |
| C. | Crookes |
| D. | None of these |
| Answer» C. Crookes | |
| 98. |
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. | |
| 99. |
The temperature in the calcium carbide furnace is _______________ °C ? |
| A. | 200-300 |
| B. | 700-850 |
| C. | 2000-2200 |
| D. | 4000-4500 |
| Answer» D. 4000-4500 | |
| 100. |
The purpose of tanning in leather industry is to____________________? |
| A. | Stiffen the leather |
| B. | Smoothen the leather |
| C. | Make it flexible |
| D. | Impart water resistance |
| Answer» B. Smoothen the leather | |