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MCQs 1: Shaving soaps are____________________?

Soft potassium soaps (potassium salt of fatty acid) with free Stearic acid to give lather a lasting property Metallic soaps compounded with frothing agents High free alkali soaps having excess of cane sugar and alcohol None of these
Answer Explanation

MCQs 2: Yellow phosphorus is transported under____________________?

Air Water Nitrogen Helium
Answer Explanation

MCQs 3: Which of the following is an explosive ?

Nitro-glycerine Trinitrotoluene (TNT) Cellulose nitrate All A , B., and C.
Answer Explanation

MCQs 4: Low temperature carbonisation of coal takes place at _______________ °C ?

300 1100 700 900
Answer Explanation

MCQs 5: Which of the following is not a product of coal tar distillation ?

Anthracene Creosote oil Carbolic oil None of these
Answer Explanation

MCQs 6: Which of the following is not present in bagasse fibre ?

Cellulose Lignin Pentogens None of these
Answer Explanation

MCQs 7: Nitrile rubber is produced by the polymerisation of__________________?

Acrylonitrile and butadiene Acrylonitrile and styrene Isobutylene and isoprene None of these
Answer Explanation

MCQs 8: Production of one ton of cement requires about _______________ tons of limestone ?

0.6 1.2 2.2 3.8
Answer Explanation

MCQs 9: Blue colour is imparted to glass by the addition of__________________?

FeSO4 PbO CaO NaOH
Answer Explanation

MCQs 10: Phenol formaldehyde____________________?

Employs addition polymerisation Employs condensation polymerisation Is a monomer Is an abrasive material
Answer Explanation

MCQs 11: Lithophane is ___________________?

Explosive White lead Filter aid ZnS (white pigment)
Answer Explanation

MCQs 12: Presence of carbonaceous matter in the sewage____________________?

Causes reduction in its dissolved oxygen content thereby endangering the life of aquatic creatures Reduces sulphate ions to sulphides causing obnoxious smell Increases the quantity of chlorine used for its purification All A, B. and C.
Answer Explanation

MCQs 13: Dechlorination of treated water is necessary to __________________?

Remove residual turbidity Reduce the bacterial load on filter Control taste and odour Remove chlorinous taste
Answer Explanation

MCQs 14: ______________________ of quicklime produces slaked lime ?

Hydration Dehydration Hydrogenation None of these
Answer Explanation

MCQs 15: An oil is converted into fat by its___________________?

Hydrogenation Hydrolysis Hydrocracking Hydration
Answer Explanation

MCQs 16: Economics of ‘Solvay Process’ depends upon the efficiency of __________________?

Carbonating tower Ammonia recovery Ammonia recovery and size of the plant Ammoniation of salt solution
Answer Explanation

MCQs 17: At a given temperature, the equilibrium yield of SO3 obtained from the oxidation of SO2 is proportional to (where, P = pressure of the system) ?

P √P P2 1/P
Answer Explanation

MCQs 18: Extraction of _________________ employs an electrolytic process ?

Aluminium Silver Copper All A, B. and C
Answer Explanation

MCQs 19: Baking soda is chemically represented by__________________?

Na2CO3 NaHCO3 Na2CO3.H2O Na2CO3.10H2O
Answer Explanation

MCQs 20: Inversion of sucrose produces_____________________?

Fructose Glucose Both A. & B. Neither A. nor B.
Answer Explanation

MCQs 21: Phenolic antiseptics are added in the __________________ soap?

Shaving Medicated Metallic Transparent
Answer Explanation

MCQs 22: The compressive strength of cement should not be less than about 110Kg/cm2 after three days & not less than 170Kg/cm2 after seven days. The fineness of an ordinary cement as determined by turbidimetric method should be about ________________ cm2/gm?

800 1600 4000 8500
Answer Explanation

MCQs 23: Soap cannot be used with hard water, because _________________?

Hard water contains sulphate They form insoluble calcium soaps which precipitate They attract back the removed dirt None of these
Answer Explanation

MCQs 24: Carborundum consists mainly of_________________?

Bauxite Silicon carbide Boron carbide Calcium carbide
Answer Explanation

MCQs 25: Carboxymethyl cellulose (CMC) is added in detergents to_________________?

Prevent redeposition of soil on cleaned surface Act as optical brightening agent Inhibit corrosion in washing machines made of aluminium None of these
Answer Explanation

MCQs 26: Styrene (a monomer for the production of polystyrene) is commercially produced by ____________________?

Catalytic dehydrogenation of ethyl benzene Dehydration of ethyl alcohol followed by hydrogenation Reacting ethylene oxide with acetaldehyde Fermentation of starch
Answer Explanation

MCQs 27: Reaction of calcium carbide with water produces a gas, which is used_________________?

As an illuminant For metal cutting/welding Both A. & B. Neither A. nor B.
Answer Explanation

MCQs 28: In the manufacture of sulphuric acid from elemental sulphur, the following sequence of major operations is followed ?

Furnace → converter → absorber Furnace → evaporator → absorber Furnace → converter → evaporator Converter → furnace → absorber
Answer Explanation

MCQs 29: Acrylonitrile is mainly used in the _____________ industry?

Polymer Printing Dyeing Photographic
Answer Explanation

MCQs 30: SO2 is bubbled through hot sugar cane juice to_______________?

Act as an acidifying agent Increase its concentration Increase the amount of molasses Increase the crystal size
Answer Explanation

MCQs 31: Maleic anhydride is produced by catalytic oxidation of____________________?

Toluene Ethyl alcohol Naphthalene Benzene
Answer Explanation

MCQs 32: Which one of the following is not an elastomer ?

Polyisoprene Neoprene Nitrile-butadiene None of these
Answer Explanation

MCQs 33: Naphthols are derivatives of________________?

Methyl amine Naphthalene Phenol Xylene
Answer Explanation

MCQs 34: In the Solvay process, the product from the calciner is___________________?

Light soda ash Dense soda ash Sodium bicarbonate Dehydrated soda ash
Answer Explanation

MCQs 35: Fermentation is adversely affected by the____________________?

Presence of air Absence of air High concentration Presence of ammonium salts
Answer Explanation

MCQs 36: Penicillin is made employing _______________ fermentation process?

Continuous Aerobic batch Anaerobic batch None of these
Answer Explanation

MCQs 37: 20% oleum means that in 100 kg oleum, there are 20 kg of_____________________?

SO3 and 80kg of H2SO4 H2SO4 and 80kg of SO3 SO3 for each 100 kg of H2SO4 None of these
Answer Explanation

MCQs 38: Nicotine is___________________?

A volatile alkaloid Obtained by treating by-products of the tobacco processing industry Both A. and B. Neither A. nor B.
Answer Explanation

MCQs 39: CO & H2 are the constituents of___________________?

Producer gas Water gas Coke oven gas All A., B. and C.
Answer Explanation

MCQs 40: Cellulose content of bamboo and ideal fibrous raw material for the manufacture of paper is ______________ percent?

10 50 80 95
Answer Explanation

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