1) 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
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2) Permanent hardness of water can be removed by____________________? a. Simply boiling b. Adding alum c. Passing it through cation & anion exchangers d. All (A), B. and (C)
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3) The yield of tar from high temperature carbonisation of dry coal is about _______________ percent? a. 3 b. 12 c. 22 d. 0.3
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4) Main product in calcium carbide-water reaction is___________________? a. Ca(OH)2 b. C2H2 c. CO2 d. CaCO3
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5) The main aim behind cooling the digested chip at the bottom portion of the digestor by injecting cold black liquor is to___________________? a. Avoid mechanical weakening of fibre b. Remove lignin by way of crystallisation c. Increase the cellulose content d. None of these
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6) Thermoplastic materials_____________________? a. Do not soften on application of heat b. Are heavily branched molecules c. Are solvent insoluble d. None of these
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7) Flexible foam (for mattresses) is usually made of_____________________? a. PVC b. Silicone c. Polyurethanes d. Polyamides
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8) Which of the following is an additional step in the manufacture of paper from bagasse as compared to that from bamboo ? a. Depithing b. Digestion c. Bleaching d. None of these
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9) The most widely used coagulant for removing suspended impurities from water is__________________? a. Bleaching powder b. Chlorine c. Calcium sulphate d. Alum
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10) Iron ore hematite is concentrated using ____________________? a. Electromagnetic separation mainly b. Gravity separation c. Froth floatation d. Roasting
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11) Which of the following is an unsaturated fatty acid ? a. Lauric acid b. Palmitic acid c. Stearic acid d. Oleic acid
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12) Percentage of glycerine present in the spent lye obtained during soap manufacture is about________________? a. 0.5 b. 5 c. 20 d. 35
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13) High purity nitrogen is used in__________________? a. Making protective gas (95% N2 + 5% H2) for annealing of cold rolled steel strip coils b. Fire fighting purposes c. Both A. & B. d. Neither A. nor (B)
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14) The main use of HCl is in the___________________? a. Drilling of petroleum wells and pickling of steel sheets b. Manufacture of cationic detergent c. Treatment of spent fuel of nuclear reactor d. None of these
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15) Sand and ______________ is fused at 1300°C, to produce sodium silicate ? a. Limestone b. Soda ash c. Coke d. Sodium sulphate
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16) The chamber process is______________________? a. Preferred over contact process for producing 98 to 100% H2SO4 and various oleums b. Non-catalytic and operates only on pyrites c. A batch process for directly producing high strength (98 to 100%) H2SO4 d. None of these
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17) Hydrophilic group of a soap or detergent solution is____________________? a. Water hating b. Soil loving c. Water loving d. None of these
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18) Oxygen is separated by distillation from air after its liquefaction. The boiling point of oxygen is about ______________ °C ? a. -83 b. -183 c. -196 d. -218
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19) Haemoglobin is a/an____________________? a. Amino acid b. Biological catalyst c. Protein d. Enzyme
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20) Esterification reaction produces _________________? a. Detergent b. Vanaspati c. Soap d. Mercaptans
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21) 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
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22) Sulphur addition in soap is done to _____________________? a. Improve the soap texture b. Cure pimples & dandruff c. Fasten lather formation d. Increase its cleansing action
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23) Glass is__________________? a. Mainly CaO b. Subjected to galvanising c. A super cooled liquid d. All A , B. and C.
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24) In sulphate pulp manufacture, the pressure and temperature in the digestor is____________________? a. 10 atm., 800 °C b. 10 atm., 170-180°C c. 1 atm., 170 – 180°C d. 1 atm., 800°C
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25) The basic constituent of vegetable oils is ___________________? a. Triglyceride b. Fatty acids c. Fatty alcohol d. Mono esters
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26) Fusion of bauxite and ________________ produces high alumina cement? a. Alum b. Limestone c. Coke d. Quartz
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27) ____________ are used as corrosion inhibitor for iron & steel in aqueous solutions ? a. Phosphates b. Chromates c. Sulphates d. Bi-carbonates
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28) 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
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29) Which of the following is not responsible for causing permanent hardness of water ? a. Ca(HCO3)2 b. CaCl2 c. MgCl2 d. None of these
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30) Which of the following contains least amount of N2 ? a. Coke oven gas b. Blast furnace gas c. Producer gas d. Water gas (blue gas)
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31) Oxidation of SO2 to SO3 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
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32) Exothermic condensation reaction of monochlorobenzene with chloral in presence of 20% oleum as catalyst produces DDT. The reaction temperature is maintained at _____________ °C ? a. 15-30 b. 90-100 c. 250-300 d. < 0
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33) Paper pulp produced by Kraft/sulphate process is__________________ ? a. Bleached easily b. Dull white in color c. Strong fibrous d. Dark colored
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34) White phosphorous is stored under water, because __________________? a. It does not react with water b. It is poisonous c. Its kindling temperature in dry air is very low d. It is unstable
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35) Styrene is produced from ethyl benzene by the process of________________? a. Dehydrogenation b. Oxidation c. Alkylation d. Dehydration
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36) Pure rectified spirit contains about _________________ percent alcohol? a. 45 b. 70 c. 95 d. 99.5
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37) The catalyst used in the manufacture of DDT (from chloral and chlorobenzene) is _________________? a. Dilute H2SO4 b. Oleum c. Ultraviolet light d. None of these
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38) Solvay process as compared to dual process (i.e. modified Solvay process) ? a. Can use low grade brine b. Has less corrosion problems c. Involves higher investment in NH3 recovery units than that for crystallisation units for NH4Cl d. Both B. and C.
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39) Insulin is an __________________ drug? a. Anti-malarial b. Anti-TB c. Antibiotic d. None of these
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40) Molasses is the starting material for the production of ___________________ ? a. Alcohol b. Essential oil c. Fatty acids d. Massecuite
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