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MCQs 1: Phthalic anhydride is used____________________?

In making PVC As plasticisers In insecticides manufacture For making nylon-6
Answer Explanation

MCQs 2: Phenol is mainly used____________________?

To produce benzene To produce phenol formaldehyde To produce polyester resin As a plasticiser for unsaturated polyester
Answer Explanation

MCQs 3: ______________ is obtained as a by-product in the manufacture of sodium hydroxide using brine ?

Chlorine Ammonium chloride Sodium carbonate Sodium bi-carbonate
Answer Explanation

MCQs 4: Solvent extracted oil________________?

Has low free fatty acid content Is odourless Has more of unsaturates None of these
Answer Explanation

MCQs 5: Fish contains about _______________ percent oil ?

5 10 20 35
Answer Explanation

MCQs 6: DDT stands for___________________?

Diethyl-diphenyl-trichloromethane Dichloro-diphenyl-trichloromethane diphenyl-dichloro-trichloromethane Dichloro-diphenyl-trichloroethane
Answer Explanation

MCQs 7: Metallic soap is ________________ salt of fatty acids ?

Sodium Potassium Both sodium & potassium Aluminium or calcium
Answer Explanation

MCQs 8: Function of thinner in a paint is to ______________________ ?

Accelerate the oxidation of oil Prevent gelling of the paint Suspend pigments & dissolve film forming materials Form a protective film
Answer Explanation

MCQs 9: Polymethyl methacrylate (PMMA) is known as ____________________?

Bakelite Teflon Perspex Nylon-6
Answer Explanation

MCQs 10: Laboratory glass wares which reacts with hydrofluoric acid, are made of the ______________ glass?

Lead Borosilicate Soda lime Alkali silicate
Answer Explanation

MCQs 11: Bio-degradable detergents ___________________?

Can be readily oxidised Pose problem in sewerage plant Have an isoparaffinic structure Should not be used as it spoils the cloth
Answer Explanation

MCQs 12: CaCl(OCl) is the chemical formula of___________________?

Hypo Bleaching powder Plaster of Paris Aqua regia
Answer Explanation

MCQs 13: Polymerisation product of C2F4 (carbon tetrafluoride) is called P.T.F.E (poly chloro tetra fluoro ethylene). It is also called___________________?

Polyurethane Silicone Teflon Epoxy resin
Answer Explanation

MCQs 14: Permanent hardness of water can be removed by_________________?

Addition of soda ash to it Treating it with zeolites Passing it through sodium hexametaphosphate All A , B, and C.
Answer Explanation

MCQs 15: Enamels______________________?

Give good glossy finish Are same as varnish Are prepared from non-drying oil Do not contain pigment
Answer Explanation

MCQs 16: Bleaching powder (chemically known as calcium chloro hypochlorite) is commercially produced by the action of chlorine on ____________________?

Slaked lime Soda lime Calcium perchlorate None of these
Answer Explanation

MCQs 17: Refractory bricks having high thermal conductivity is desirable, when it is to be used in the _________________?

L.D. converter Blast furnace Rotary kiln Recuperator
Answer Explanation

MCQs 18: Glycerine is a by-product of the ________________ industry ?

Soap Detergent Oil hydrogenation Paint
Answer Explanation

MCQs 19: The amount of benzene present in pure Benzol is about _______________ percent ?

30 50 70 90
Answer Explanation

MCQs 20: The purpose of tanning in leather industry is to____________________?

Stiffen the leather Smoothen the leather Make it flexible Impart water resistance
Answer Explanation

MCQs 21: Solvay process is used for the manufacture of____________________?

Caustic soda Soda ash Caustic potash Soda lime
Answer Explanation

MCQs 22: Rosin soap is added during paper manufacture to____________________?

Impart adhesive properties Improve opacity Impart resistance to penetration by liquids None of these
Answer Explanation

MCQs 23: Enzymes are organic catalysts used in the ____________________ reactions ?

Chemical Biochemical Photochemical Electrochemical
Answer Explanation

MCQs 24: Which of the following is not an antibiotic ?

Penicillin Streptomycin Tetracycline Quinine
Answer Explanation

MCQs 25: Glycerine is recovered from lye by ___________________?

Evaporation followed by vacuum distillation Liquid extraction technique Extractive distillation technique None of these
Answer Explanation

MCQs 26: Salt is the basic raw material for the manufacture of____________________?

Cement Glass Potteries Caustic soda
Answer Explanation

MCQs 27: Hydrogenation of oil takes place in a/an ____________________ reactor ?

Autothermal Trickle bed Plug flow None of these
Answer Explanation

MCQs 28: Na2CO3 is called _________________?

Washing soda Soda ash Plaster of Paris Calcite
Answer Explanation

MCQs 29: A mineral is termed as ‘ore’, if ____________________?

A metal can be economically extracted from it It contains ≥ 40% metal The metal present in it is costly All A , B. and C.
Answer Explanation

MCQs 30: Fourdrinier machine is used in the manufacture of ___________________?

Sugar Paper Alcohol from molasses Phenol formaldehyde
Answer Explanation

MCQs 31: Which of the following paper does not require a filler during manufacture ?

Bond paper Writing paper Blotting paper Coloured paper
Answer Explanation

MCQs 32: ________________ acid is an unsaturated fatty acid ?

Palmitic Oleic Stearic Oxalic
Answer Explanation

MCQs 33: Which glass is usually used in optical work ?

Lead glass High silica (borosilicate) glass Photo-sensitive glass Fibre glass
Answer Explanation

MCQs 34: The major use of butadiene is____________________?

As a plasticiser for unsaturated polyester In the manufacture of synthetic rubber As an anti-skinning agent in paint None of these
Answer Explanation

MCQs 35: Reaction of an alcohol with organic acid is called the ________________ reaction?

Saponification Esterification Neutralisation Acidification
Answer Explanation

MCQs 36: ____________________ of rubber decreases after its vulcanisation?

Resistance to the action of organic solvent Tackiness Maximum service temperature Tensile strength
Answer Explanation

MCQs 37: The enzyme which converts starch into the disaccharides maltose is_________________?

Diastase Maltase Yeast None of these
Answer Explanation

MCQs 38: Stereospecific agents are exemplified by________________?

Radiation Supported metal oxide catalysts Ziegler catalysts All A , B. & C
Answer Explanation

MCQs 39: Hydrogenation of oil does not ___________________?

Remove double bonds Raise its melting point Improve its resistance to oxidation None of these
Answer Explanation

MCQs 40: Sulphuric acid saturated with SO3 is called_________________?

Concentrated H2SO4 Sulphurous acid Oleum None of these
Answer Explanation

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