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MCQs 1: Concentration of NaOH solution produced by diaphragm electrolytic cell is about _______________ percent?

10 25 50 98
Answer Explanation

MCQs 2: In an integrated steel plant, NH3 present in coke oven gas is normally recovered as_________________?

(NH4)2SO4 NH4Cl (NH4)2 NO3 Liquid NH3
Answer Explanation

MCQs 3: Chemical formula of BHC, which is an insecticide is__________________?

C6H6Cl6 C6Cl6 C6H5Cl C6H4Cl2
Answer Explanation

MCQs 4: Nylon-6 as compared to Nylon-66 is having higher___________________?

Hardness Abrasion/resistance Melting point None of these
Answer Explanation

MCQs 5: Sucrose is a__________________?

Monosaccharide Disaccharide Polysaccharide None of these
Answer Explanation

MCQs 6: A mixture of chlorine & sodium bromide acts as a/an_________________?

Insecticides Analgesic drug Fire retardant Hydrogenation catalyst
Answer Explanation

MCQs 7: _________________ is produced using Polycondensation Reaction?

Polythene Phenol formaldehyde Poly vinyl chloride None of these
Answer Explanation

MCQs 8: Penicillin, an antibiotic drug was discovered by__________________?

Alexander Flaming Doctor Zhivago None of these
Answer Explanation

MCQs 9: Which of the following impurities in feed water for high pressure boiler is the most detrimental ?

Silica Dissolved oxygen Suspended salt Dissolved salt
Answer Explanation

MCQs 10: One of the steps during refining of cane sugar consists of addition of hydrated lime to the sugar syrup followed by carbonation of the resulting solution. The purpose of this step is to_________________?

Adjust the pH of the syrup Remove the coloring matter from the syrup Reduce the viscosity of the syrup Improve the rate of crystallisation of sugar
Answer Explanation

MCQs 11: Plasticisers are added to synthetic plastics to____________________?

Impart flexibility Improve workability during fabrication Develop new improved properties not present in the original resins All A, B. and C.
Answer Explanation

MCQs 12: Celluloid is chemically___________________?

Cellulose acetate Regenerated cellulose Cellulose nitrate Cellulose acetate butyrate
Answer Explanation

MCQs 13: Permanent hardness of water can be removed by___________________?

Boiling Adding Ca(OH)2 Boiling it with Na2CO3 None of these
Answer Explanation

MCQs 14: Viscose rayon is__________________?

Cellulose nitrate Regenerated cellulose nitrate Regenerated cellulose acetate None of these
Answer Explanation

MCQs 15: Nitric acid is not used in the manufacture of______________________?

Detergents Fertilisers Aqua regia Explosives
Answer Explanation

MCQs 16: Sea water contains about ______________________ ppm of bromine ?

5 70 500 1700
Answer Explanation

MCQs 17: Teflon is___________________?

Phenol formaldehyde An inorganic polymer Poly tetra-fluoro-ethylene (P.T.F.E.) A monomer
Answer Explanation

MCQs 18: In contact process, SO3 is absorbed in 97% H2SO4 and not in water, because___________________?

SO3 gas is sparingly soluble in water Water forms an acid mist, which is difficult to absorb The purity of acid is affected Scale formation in the absorber is to be avoided
Answer Explanation

MCQs 19: Carbon disulphide is mainly used in the production of______________________?

Viscose rayon Corundum Plasticiser for unsaturated polyester Paints
Answer Explanation

MCQs 20: Penicillin is separated from fermented broth by ____________________?

Extraction with amyl or butyl acetate Ternary Azeotropic distillation Evaporator in calandria Extractive distillation
Answer Explanation

MCQs 21: Hydrocyanic acid (HCN) is used as an insecticide for____________________?

Controlling timber degradation by ants Controlling poultry lice Potato beetle Citrus fruits
Answer Explanation

MCQs 22: Catalytic oxidation of toluene produces____________________?

Styrene Phenol Benzene Tri-nitro-toluene
Answer Explanation

MCQs 23: Favourable conditions for the liquefaction of gases in general are _____________________?

High pressure & low temperature Low pressure & high temperature High pressure & high temperature Low pressure & low temperature
Answer Explanation

MCQs 24: Contact process of sulphuric acid manufacture ____________________?

Yields acid of higher concentration than chamber process Yields acids of lower concentration than chamber process Is obsolete Eliminates absorber
Answer Explanation

MCQs 25: Chemical formula of oleum is_________________?

H2SO3 H2SO4 H2S2O7 H2SO7
Answer Explanation

MCQs 26: What products do we get on electrolysis of saturated brine using steel cathode and graphite anode in an electrolytic cell ?

Cl2 & Na Cl2 & H2 O2 & H2 Cl2, H2 & NaOH solution
Answer Explanation

MCQs 27: Phenol formaldehyde is produced by condensation polymerisation. It is also known as_____________________?

Teflon Bakelite Polyester Nylon-66
Answer Explanation

MCQs 28: Which of the following processes can remove both temporary as well as permanent hardness of water ?

Filtration Boiling Distillation None of these
Answer Explanation

MCQs 29: Widely used method for the conditioning of boiler feed water is the ___________________?

Cold lime process Coagulation Hot-lime soda process Sequestration
Answer Explanation

MCQs 30: Shrinkage volume in cement setting does not depend upon the _____________________?

Sand to cement ratio Water to cement ratio Ambient temperature fluctuation Drying period
Answer Explanation

MCQs 31: Sizing material is incorporated in paper to___________________?

Impart resistance to penetration by liquids Increase its thickness Increase its flexibility & opacity Increase its brightness
Answer Explanation

MCQs 32: Hydrolysis of sugar is called_____________________?

Hydration Inversion Esterification None of these
Answer Explanation

MCQs 33: Commercially ethylene is produced from naphtha by ______________________?

Catalytic cracking Catalytic dehydrogenation Pyrolysis Hydrocracking
Answer Explanation

MCQs 34: Coloured glass is obtained by mixing of colored salts. Addition of ___________________ oxide is done to impart greenish blue color to the glass?

Chromium Arsenic Copper Manganese
Answer Explanation

MCQs 35: Yellow glycerine is made into white, using____________________?

Activated carbon Diatomaceous earth Bauxite Bentonite
Answer Explanation

MCQs 36: Flux addition during smelting of ore is done to___________________?

Remove impurities/gangue Enhance rate of reaction Accelerate reduction of ore Separate slag from metal
Answer Explanation

MCQs 37: The manufacture of Kraft pulp is done by a/an _________________ process?

Alkaline Acidic Neutral None of these
Answer Explanation

MCQs 38: The most reactive allotropic form of phosphorus is __________________ phosphorus?

Red Yellow Violet Black
Answer Explanation

MCQs 39: Industrial production of chloroform requires acetone and_____________________?

Phosgene Calcium hypochlorite Chlorine Ammonium chloride
Answer Explanation

MCQs 40: The most popular and common detergent i.e., alkyl benzene sulfonate (ABS) is a/an ______________ detergent ?

Cationic Anionic Amphoteric Semi polar
Answer Explanation

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