1) Low purity oxygen is used for____________________? a. L.D. steel making b. Cutting and welding of metals c. Medicinal purposes d. Chemical oxidation processes
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2) Highly porous refractory bricks are ____________________? a. Less susceptible to chemical attack by molten fluxes and gases etc b. Very strong c. Having very high thermal conductivity d. None of these
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3) The temperature in the calcium carbide furnace is _______________ °C ? a. 200-300 b. 700-850 c. 2000-2200 d. 4000-4500
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4) Sodium chloride content in sea water is about _______________ gms/liter? a. 2 b. 10 c. 25 d. 50
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5) Lindane is____________________? a. Not a fumigant b. BHC (Benzene Hexachloride) containing 99% γ-isomer c. A by-product of BHC manufacture d. Both B. and C.
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6) Carboxymethyl cellulose (CMC) is added in detergents to act as a/an___________________? a. Surfactant b. Builder c. Optical brightening agent d. Anti soil redeposition agent
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7) 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
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8) Most easily and cheaply available fibrous raw material for paper manufacture available in India is bamboo. The yield of pulp produced from fibrous raw material by mechanical process is about _____________ percent? a. 75 b. < 10 c. > 30 d. 50
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9) ‘Synthesis gas’ meant for the synthesis of organic compound is a variable mixture of ____________________? a. N2 & H2 b. CO2 & H2 c. CO & H2 d. C & H2
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10) 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.
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11) Polyvinyl chloride (PVC) is____________________? a. A thermosetting material b. A condensation polymerisation product c. Made by employing emulsion polymerisation d. None of these
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12) The basic difference between vegetable oils and fats is in their ___________________? a. Density b. Chemical properties c. Physical state d. Composition
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13) Removal of dirt/soil by soaps or detergent does not involve the _______________ of soil ? a. Emulsification b. Dispersion c. Precipitation d. Wetting
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14) Drinking (potable) water treatment does not involve __________________? a. Coagulation b. Sedimentation c. Softening d. Disinfection
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15) 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
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16) Which oil is preferred for paint manufacture ? a. Drying oil b. Non-drying oil c. Semi-drying oil d. Saturated oil
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17) Pick out the wrong statement pertaining to nitric acid ? a. About 90% of nitric acid is manufactured by Ostwald’s process b. It is a strong mono basic acid which reacts with almost all the metals except noble metals c. Yellow color of impure nitric acid is because of dissolved oxides of nitrogen (mainly NO2) d. Arc process of nitric acid manufacture is economical as compared to Ostwald’s process
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18) 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 A , B. & C.
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19) Magnesium and calcium ______________ cause temporary hardness of water ? a. Carbonates b. Bicarbonates c. Phosphates d. Sulphates
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20) Which of the following, when pyrolysed, produces Perchloroethylene ? a. Ethylene dichloride b. Chlorobenzene c. Carbon tetrachloride d. Chlorinated paraffin
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21) Pick out the exothermic reaction out of the following ? a. C + H2O = CO + H2 b. CaC2 + H2O = Ca(OH)2 + C2H2 c. MgCO3 = MgO + CO2 d. All (A), B. and (C)
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22) ______________ paper is used in the manufacture of newsprint paper ? a. Ground-wood b. Board c. Tissue d. Wrapping
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23) Which of the following is the main constituent of the mother liquor produced in salt industry ? a. Quick lime b. Glauber’s salt c. Salt petre d. Bromine
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24) Concentration of hydrogen peroxide is done by_____________________? a. Crystallisation b. Vacuum crystallisation c. Atmospheric distillation d. Dehydration
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25) Bakelite is chemically known as_____________________? a. Polyvinyl chloride (PVC) b. Polybutadiene c. Phenol formaldehyde d. Polyurethane
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26) Terylene is__________________? a. Same as Dacron b. A polyester c. Both A. & B. d. Neither A. nor B.
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27) 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
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28) Production of one ton of dry paper pulp requires about ___________________ tons of bamboo or wood? a. 1 b. 2.5 c. 5 d. 10
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29) 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
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30) Ordinary glass is not a/an_________________? a. Amorphous isotropic material b. Supercooled liquid c. Material with sharp definite melting point d. Electrical insulator
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31) Hydrochloric acid is also known as_________________? a. Oil of vitriol b. Muriatic acid c. Strong organic acid d. Green acid
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32) Higher viscosity index of a lubricating oil denotes_______________? a. Less changes in fluidity of oil with temperature b. Substantially high change in fluidity of oil with temperature c. Its unsuitability under varying temperature conditions d. None of these
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33) Chloral is used in the manufacture of__________________? a. DDT b. BHC c. Parathion d. None of these
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34) Reverse osmosis is normally used for the_______________? a. Separation of isotopes of uranium from gaseous uranium hexafluoride b. Separation of helium from natural gas c. Desalination of brackish water to produce potable (drinking) water d. Purification of oxygen
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35) 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
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36) 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
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37) The biochemical treatment applied to sewage effluents is a process of__________________? a. Dehydration b. Reduction c. Oxidation d. Polymerisation
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38) At very high concentration of enzymes, the rate of fermentation chemical reaction is _____________ the concentration of reactants? a. Independent of b. Directly proportional to c. Inversely proportional to d. Proportional to the square of
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39) ______________ is used as a flux in the extraction of iron from iron ore (haematite) in blast furnace? a. Bauxite b. Limestone c. Quartz d. Manganese
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40) Dry ice (solidified CO2) 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
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