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MCQs 1: ______________ Nature of hypo (sodium thiosulphate) makes it useful in photography ?

Oxidising Reducing Complex forming Photochemical
Answer Explanation

MCQs 2: Starting material for the production of styrene butadiene rubber (SBR) is________________?

Ethyl alcohol Ethylene Both A. & B. Neither A. nor B.
Answer Explanation

MCQs 3: Major component of flint glass is_____________________?

Lead oxide Silica Alumina Soda
Answer Explanation

MCQs 4: Cation exchanger is regenerated usually with_________________________?

NaOH H2SO4 Hydrazine Alum solution
Answer Explanation

MCQs 5: Molecular weight of plastics ranges from ______________________?

5000 to 10000 20000 to 250000 500 to 5000 106 to 109
Answer Explanation

MCQs 6: Which of the following is not an insecticide ?

Hydrocyanic acid Nicotine Sodium fluoride Hexane
Answer Explanation

MCQs 7: Catalyst used in the oxidation of benzene to produce Maleic anhydride is ______________________?

V2O5 Pt Ni Cr
Answer Explanation

MCQs 8: Poly Vinyl Chloride (P.V.C.) is a ______________ material ?

Thermosetting Thermoplastic Fibrous Chemically active
Answer Explanation

MCQs 9: _______________ is used as a flux in the smelting of copper ore like chalcopyrite ?

Coke breeze Lime powder Silica/quartz Dolomite
Answer Explanation

MCQs 10: Glauber’s salt is chemically ?

Calcium sulphate Potassium sulphate Potassium chlorate None of these
Answer Explanation

MCQs 11: Sulphuric acid completely saturated with sulphur trioxide is called_________________?

Concentrated sulphuric acid Oleum Sulphurous acid Dilute sulphuric acid
Answer Explanation

MCQs 12: Commercial production of Vanaspati is done by _______________ of edible vegetable oils ?

Hydrogenation Oxidation Hydrolysis Hydrocracking
Answer Explanation

MCQs 13: Which of the following is an ore of iron ?

Galena Chalcopyrite Hematite Bauxite
Answer Explanation

MCQs 14: Double Contact Double Absorption (DCDA) process is the most recent process for the manufacture of ____________________?

Nitric acid Sulphuric acid Ammonium sulphate Hydrochloric acid
Answer Explanation

MCQs 15: Naphthalene is removed from coke oven gas by ________________________?

Adsorbing on palladium Absorbing in ethanolamine Scrubbing with wash oil Passing it through electrostatic precipitator
Answer Explanation

MCQs 16: Catalyst used during the manufacture of ‘Vanaspati Ghee’ is ___________________?

Zinc Nickel Platinum Copper
Answer Explanation

MCQs 17: Enzymes are_________________?

Proteins with high molecular weight (around 10,000) Derived from living organisms Catalyst for temperature sensitive reactions All A, B. and C.
Answer Explanation

MCQs 18: In Kraft process of paper manufacture, white cooking liquor consists of caustic soda________________?

Sodium sulphide & sodium carbonate Sodium sulphite & sodium carbonate Sodium sulphite & sodium sulphide None of these
Answer Explanation

MCQs 19: Chemical formula of ‘salt cake’ is____________________?

Na2SO4 CaSO4 MgSO4 BaSO4
Answer Explanation

MCQs 20: Linde process of gas liquefaction employs__________________?

Exchange of heat with colder stream Adiabatic expansion through a throttle valve (Joule-Thomson expansion) Adiabatic expansion against a piston or in a turbine Merely compressing the gas beyond its critical pressure
Answer Explanation

MCQs 21: ______________ is a thermosetting plastic?

Polyvinyl chloride Polythene Bakelite Teflon
Answer Explanation

MCQs 22: Antibiotic____________________?

Inhibits/destroys the growth of microorganisms Is used as a pain reliever Is an antimalarial Is an anaesthetic
Answer Explanation

MCQs 23: Digestion of wood-base materials (for manufacture of pulp) is done to __________________?

Remove lignin Produce long fibres Prevent deterioration on storage None of these
Answer Explanation

MCQs 24: Thermosetting plastic materials____________________?

Can be repeatedly melted Is useful for melt casting Cannot be melted after forming Is useful for spinning
Answer Explanation

MCQs 25: Rancidity of the fatty oil can be reduced by its__________________?

Decoloration Hydrogenation Oxidation Purification
Answer Explanation

MCQs 26: Temperature during hydrogenation of oil should not be more than 200°C, otherwise it will result in______________________?

Pyrolysis of oil Sintering of porous catalyst Hydrogen embrittlement All A, B. and C.
Answer Explanation

MCQs 27: Oleum produces fumes of_____________________?

SO2 H2SO4 SO3 SO2 + H2SO4
Answer Explanation

MCQs 28: Which of the following is not produced commercially from sea water ?

Magnesium & potassium compounds Common salt Bromine Iodine
Answer Explanation

MCQs 29: The most commonly used substance to speed up the sedimentation of sewage is___________________?

Lime Sulphuric acid Chlorine Sodium bisulphite
Answer Explanation

MCQs 30: Hydrogen gas is not produced commercially (for nitrogenous fertiliser manufacture) by _____________________?

Iron-steam reaction Electrolysis of water Steam reforming of naphtha Its cryogenic separation from coke oven gas
Answer Explanation

MCQs 31: ______________ is an ore of lead?

Quartz Galena Siderite Chalcopyrite
Answer Explanation

MCQs 32: Presence of H2S in raw water (to be chlorinated) results in the_____________________?

Reduced softening capacity of zeolite Increased dosage of chlorine to provide a disinfecting residual in the water Easy removal of its hardness None of these
Answer Explanation

MCQs 33: Platinum catalyst used in the earlier days of sulphuric acid manufacture by contact process suffers from the drawback like_________________?

High cost Fragile nature Easy poisoning tendency All A, B. and C.
Answer Explanation

MCQs 34: Separation of fresh water from sea water can be done by the _______________ operation ?

Osmosis Reverse osmosis Absorption Adsorption
Answer Explanation

MCQs 35: The main use of activated carbon in water treatment is to control ___________________?

Bacterial growth Taste and odour Turbidity None of these
Answer Explanation

MCQs 36: Fatty material used in soap making is _______________________?

Fatty acid Fatty alcohols Tallow Detergents
Answer Explanation

MCQs 37: Percentage of alcohol in beer may be around ______________________ percent?

2-8 18-23 27-32 1-4
Answer Explanation

MCQs 38: Salt is added in the kettle during soap manufacture to separate ___________________?

Soap from lye Glycerine from lye The metallic soap The unsaponified fat from soap
Answer Explanation

MCQs 39: The main product of high temperature carbonisation of coal is_____________________?

Coke Ammonia Tar Phenol
Answer Explanation

MCQs 40: Nylon-66 is so named because the____________________?

Average degree of polymerisation of the polymer is 1966 Number of carbon atoms between two nitrogen atoms are 6 Number of nitrogen atoms between two carbon atoms are 6 Polymer was first synthesised in 1966
Answer Explanation

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