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You Are On Multi Choice Question Bank SET 618
30901. Teflon is
(A): phenol formaldehyde. (B): an inorganic polymer. (C): poly tetrafluoroethylene (P.T.F.E.). (D): a monomer.
30902. Chrome tanning and vegetable tanning are done for
(A): light & heavy leather respectively. (B): heavy & light leather respectively. (C): both light & heavy leather. (D): neither light nor heavy leather.
30903. Catalyst used during the manufacture of 'Vanaspati Ghee' is
(A): zinc (B): nickel (C): platinum (D): copper
30904. Iron ore hametite is concentrated using
(A): electro magnetic separation mainly. (B): gravity separation. (C): froth floatation. (D): roasting.
30905. Refractory bricks burnt at very high temperature have got
(A): greater resistance to corrosion by slags. (B): less resistance to corrosion by slags. (C): high spalling tendency. (D): none of these.
30906. Carbon disulphide is mainly used in the production of
(A): viscose rayon. (B): corundum. (C): plasticiser for unsaturated polyester. (D): paints.
30907. 99.5% purity oxygen is used in
(A): cutting and welding by oxy-acetylene flame. (B): hospitals for medicinal purposes. (C): gas masks and artificial breathing apparatus. (D): all , , and .
30908. Nylon-6 is manufactured from
(A): caprolactum. (B): hexamethylene diamine and adipic acid. (C): hexamethylene diamine and maleic anhydride. (D): hexamethylene diamine and sebacic acid.
30909. The Kerala Co-operative Tribunal is constituted under which provisions?
(A): Se81 and Rule 95 (B): Sec 95 and Rule 81 (C): Sec 81 and Rule 85. (D): Se85 and Rule 85
30910. Sizing material is incorporated in paper to
(A): impart resistance to penetration by liquids. (B): increase its thickness. (C): increase its flexibility & opacity. (D): increase its brightness.
30911. Who constitutes circle Co-operative Unions?
(A): Government (B): Registrar (C): Tribunal (D): Apex Society
30912. Which of the following, when pyrolysed, produces perchloro-ethylene ?
(A): Ethylene dichloride (B): Chlorobenzene (C): Carbon tetrachloride (D): Chlorinated paraffin
30913. Chemical name of aspirin (an analgesic drug) is
(A): acetylsalicylic acid (B): nictonic acid (C): calcium acetate (D): methyl salicylate
30914. Which is the most efficient absorbant for SO3 out of the following ?
(A): 20% oleum (B): 65% oleum (C): 78%H2SO4 (D): 98%H2SO4
30915. Coal tar is used as a
(A): binding material for coal briquettes. (B): fuel in rotary kiln. (C): binder in making carbon electrodes. (D): all , and .
30916. Caprolactum (a raw material for nylon-6 manufacture) is produced from
(A): phenol (B): naphthalene (C): benzene (D): pyridine
30917. The purpose of adding Na2CO3 to water of low alkalinity is to
(A): permit the use of alum as a coagulant. (B): increase the softening capacity of zeolite. (C): facilitate easy regeneration of zeolite. (D): all , and .
30918. Ca(OH)2 is called
(A): quicklime (B): slaked lime (C): limestone (D): gypsum
30919. Percentage of uranium in carnotite ore found in Jadugoda (Jharkhand) is about
(A): 0.1 to 0.5 (B): 1 to 5 (C): 5 to 10 (D): 15 to 25
30920. Potassium is kept & transported under
(A): water (B): liquid ammonia (C): kerosene oil (D): alcohol
30921. The metallic aluminium is obtained from pure alumina in the presence of fused cryolite by
(A): electrolysis (B): electrolytic reduction (C): electrolytic oxidation (D): none of these
30922. Bakelite is chemically known as
(A): polyvinyl chloride (PVC) (B): polybutadiene (C): phenol formaldehyde (D): polyurathane
30923. Which of the following is a co-product during the manufacture of caustic soda by electrolysis of brine ?
(A): Na2CO3 (B): NaHCO3 (C): H2 (D): none of these
30924. Phthalic anhydride is made by the
(A): oxidation of naphthalene. (B): oxidation of benzene. (C): dehydrogenation of ethyl benzene. (D): none of these.
30925. RDX (an explosive), which is more sensitive but less toxic than TNT, is chemically
(A): cyclo trimethylene trinitramine. (B): trinitro resorcinol. (C): cyclo tetramethylene tetranitramine. (D): trinitro benzene.
30926. Raw material used in alcohol distilleries in India is
(A): molasses (B): benzol (C): methylated spirit (D): none of these
30927. Oil produced by solvent extraction
(A): has low free fatty acid content. (B): is odourless. (C): both &. (D): neither nor .
30928. High acid value of an oil or fat is an indication of
(A): storage under improper conditions. (B): absence of unsaturation. (C): its smaller molecular weight. (D): none of these.
30929. Yeast is used in the manufacture of
(A): pencillin (B): antibiotics (C): wine (D): pasteurised milk
30930. 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.
30931. Anion exchanger is regenerated usually with
(A): NaOH (B): H2SO4 (C): hydrazine (D): alum solution
30932. __________ is the major constituent of the Portland cement.
(A): Calcium carbonate (B): Calcium oxide (C): Tricalcium silicate (D): Calcium sulphate
30933. Catalytic oxidation of naphthalene produces
(A): styrene (B): phenol (C): phthalic anhydride (D): none of these
30934. Parathion and Malathion are
(A): pesticides. (B): plasticisers for unsaturated polysters. (C): pain-relieving drugs (analgesic). (D): tranquilisers.
30935. 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.
30936. Dehydrogenation of ethyl benzene produces
(A): styrene (B): naphthalene (C): phenol (D): benzoic acid
30937. Reaction of ethylene glycol and dimethyl terephthalate (DMT) produces
(A): nylon-6 (B): dacron (C): polyester (D): PVC
30938. Lindane is
(A): not a fumigant. (B): BHC (Benzene Hexa Chloride) containing 99% γ-isomer. (C): a by-product of BHC manufacture. (D): both and .
30939. Solvay process is not used for the manufacture of potassium carbonate, because of the reason that potassium bicarbonate
(A): is prone to thermal decomposition. (B): has high water solubility and is unstable. (C): is soluble in ammonium chloride and potassium chloride solution. (D): all , and .
30940. 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
30941. In the production of soda ash by Solvay process, the by-product is
(A): CaCl2 (B): NH4Cl (C): NH3 (D): NaOH
30942. The ideal pulp for the manufacture of paper should have high __________ content.
(A): cellulose (B): lignin (C): both & (D): none of these
30943. 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
30944. Which of the following is a constituent of vinegar ?
(A): Around 10% alcohol (B): Around 1% acetic acid (C): Both and (D): Neither nor
30945. During the manufacture of sulphuric acid, the temperature of molten sulphur is not increased beyond 160°C, as
(A): it is very corrosive at elevated temperature. (B): its viscosity is not reduced on further heating (hence pressure drop on pumping it, cannot be further reduced). (C): it decomposes on further increasing the temperature. (D): none of these.
30946. 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.
30947. Addition of calcium oxide to water produces
(A): exothermic heat (B): hissing sound (C): slaked lime (D): all , &
30948. Sodium bisulphite is used for __________ water.
(A): deaeration (B): dechlorination (C): both & (D): neither nor
30949. Riboflavin is a/an
(A): vitamin (B): analgesic drug (C): anaesthetics (D): anti-malarial drug
30950. Flash point of most vegetable oils is about __________ °C.
(A): 50 (B): 100 (C): 200 (D): 300
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