Chemical Process Quiz 8

1 / 50

Polyvinyl chloride (PVC) is______?

Made by employing emulsion polymerisation

A condensation polymerisation product

A thermosetting material

None of these

2 / 50

Pitch (a product of coal tar distillation) is always mixed with creosote oil, when it is to be burnt in a burner, because___________?

Tar neutralises the residual acids present in pitch

All A, B. and C.

It reduces viscosity and imparts fluidity for its transportation through pipelines at economic pressure drop

Its calorific value is very less

3 / 50

Pig iron is produced by blast furnaces in India using mostly the iron ore named ________?

Magnetite

Siderite

Chalcopyrite

Hematite

4 / 50

Pick out the wrong statement ?

Bagasse fibre contains both lignin & cellulose

Alkali consumption in digestion/cooking of bamboo is measured in terms of permanganate number

Fibrillation of fibre during paper manufacture is done to develop the strength in paper

Presence of sodium sulphate in pulp makes the pulp bleachability poor

5 / 50

Pick out the wrong statement ?

Production of cold SBR employs lower pressure as compared to that of hot SBR

None of these

Polymerisation temperature can modify the properties of SBR

Cold rubber (SBR) is superior as compared to hot rubber (SBR)

6 / 50

Pick out the exothermic reaction out of the following ?

CaC2 + H2O = Ca(OH)2 + C2H2

C + H2O = CO + H2

All (A), B. and (C)

MgCO3 = MgO + CO2

7 / 50

Portland cement consists mainly of___________?

CaO & Al2O3

CaO & Fe2O3

CaO & SiO2

SiO2 & Al2O3

8 / 50

Producer gas consists mainly of__________?

CO, H2

C2H2, CO2, H2

H2, CH4

CO, CO2 N2, H2

9 / 50

Pick out the wrong statement pertaining to nitric acid ?

Arc process of nitric acid manufacture is economical as compared to Ostwald?s process

About 90% of nitric acid is manufactured by Ostwald?s process

It is a strong mono basic acid which reacts with almost all the metals except noble metals

Yellow color of impure nitric acid is because of dissolved oxides of nitrogen (mainly NO2)

10 / 50

Pick out the wrong statement?

Glass is decolorized during its manufacture by adding antimony oxide, manganese dioxide or arsenic oxide

Red color is imparted to glass by addition of arsenic oxide

Ordinary glass is represented chemically by Na2O . CaO . 6SiO2

Hard glass which is used for making laboratory glass wares is a mixture of sodium borosilicate and aluminium borosilicate

11 / 50

Pick out the wrong statement ?

Protein catalysts are called enzymes

Wine, rum & Vodka are prepared by the formulation of fruit juice, sugar beet & rye respectively

The rate of chemical reaction is independent of the concentration of reactants at high concentration of enzymes

Total sugar content in molasses is about 10%

12 / 50

Pick out the wrong statement ?

Pasteurisation of milk involves moderate heating followed by cooling

Enzyme is a complex nitrogenous compound

Bakeries and breweries make use of yeasts

Oils and fats are alkaloids

13 / 50

Potassium is kept & transported under _____ ?

Water

Kerosene oil

Alcohol

Liquid ammonia

14 / 50

Plasticisers are added to synthetic plastics to______?

All A, B. and C.

Impart flexibility

Improve workability during fabrication

Develop new improved properties not present in the original resins

15 / 50

Pick out the wrong statement?

None of these

Portland cement is made employing wet process

Gypsum is added to Portland cement to lengthen its setting time

Dry process is used for the manufacture of cement, when the raw material is blast furnace slag

16 / 50

Platinum is a versatile catalyst for many processes in chemical industries. It is highly prone to be poisoned by the presence of__________?

Carbon

Arsenic

Lead

Sulphur

17 / 50

Polymethyl methacrylate (PMMA) is known as ______?

Nylon-6

Teflon

Perspex

Bakelite

18 / 50

Pick out the wrong statement ?

Contact process of sulphuric acid manufacture uses nickel as the catalyst

Chamber process of sulphuric acid manufacture produces pure acid of concentration < 80%

Contact process of sulphuric acid manufacture produces pure acid of concentration ? 98%

75% oleum can be produced by distillation of 20% oleum

19 / 50

Platinum catalyst used in the earlier days of sulphuric acid manufacture by contact process suffers from the drawback like__________?

High cost

Easy poisoning tendency

Fragile nature

All A, B. and C.

20 / 50

Presence of H2S in raw water (to be chlorinated) results in the_______?

None of these

Easy removal of its hardness

Increased dosage of chlorine to provide a disinfecting residual in the water

Reduced softening capacity of zeolite

21 / 50

Pick out the wrong statement pertaining to the soap manufacture?

Colourless rosin is used in the manufacture of laundry soaps

Transparent soaps are made by cold process

Both laundry as well as toilet soaps are manufactured by hot process

Organic pigments are used as colouring materials in the soap manufacture

22 / 50

Pick out the wrong statement ?

Kraft method of pulp manufacture can process all types of fibrous raw materials

Digestion time for bagasse is less than that for wood base materials

Both temperature and pressure in the digestor is less in case of the sulphite method as compared to that in the sulphate method

None of these

23 / 50

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

Epoxy resin

Polyurethane

Silicone

Teflon

24 / 50

Phthalic anhydride is made by the ________?

Oxidation of benzene

Oxidation of naphthalene

None of these

Dehydrogenation of ethyl benzene

25 / 50

Polythene is a/an _______ polymerisation product?

Thermosetting

Addition

None of these

Condensation

26 / 50

Pick out the wrong statement ?

Catalytic hydrogenation of carbon monoxide produces methyl alcohol

Ethanolamines are produced by using ammonia and ethylene oxide as raw material

In nylon-6, the number 6 represents the total number of carbon atoms in the ring

Raw materials for DDT manufacture are benzene and chlorine

27 / 50

Pick out the wrong statement pertaining to solvent extraction of oil. Rate of extraction___________?

Decreases with decrease of thickness of the flakes

Decreases as the moisture content of flakes increases

Increases considerably with the rise of temperature

Increases with the increasing flake size keeping the flake thickness constant

28 / 50

Production of alcohol by fermentation of molasses is a/an ______ process?

Both B. and C.

Aerobic

Anaerobic

Endothermic

29 / 50

Pick out the wrong statement?

None of these

Basic dyes (e.g. amino derivatives) are applied mostly to paper

Azoic dyes are mostly applied on cotton fabrics

Mordant dyes are applied mainly to wools

30 / 50

Pick out the false statement pertaining to water treatment ?

Aeration of water is effective in CO2 removal

Sodium sulphate or sodium carbonate do not cause hardness in water

Water with pH value less than 7, is acidic

The zeolite water softening process reduces the hardness of water by not more than 50%

31 / 50

Pick out the wrong statement pertaining to the properties of glasses. Glasses generally have_____?

Low co-efficient of thermal expansion

Sharp melting points

High electrical insulation properties

Compressive strength much greater than their tensile strengths

32 / 50

Prussian blue is chemically represented by___________?

Ca SO4 . 2H2O

AlF3 . 3NaF

FeO.TiO2

Fe4 [Fe (CN6)3]

33 / 50

Presence of carbonaceous matter in the sewage______?

Increases the quantity of chlorine used for its purification

Reduces sulphate ions to sulphides causing obnoxious smell

Causes reduction in its dissolved oxygen content thereby endangering the life of aquatic creatures

All A, B. and C.

34 / 50

Process conditions in fermentator used for production of penicillin is______?

50?C, l0 atm

30?C, 200 mm Hg (absolute)

90?C, 45 atm

25?C, 2 atm

35 / 50

Poly Tetrafluoroethylene (P.T.F.E.) is known as_____?

Celluloid

Dacron

Teflon

Bakelite

36 / 50

Pick out the wrong statement ?

Acetylene gas cannot be used for illumination purpose

Gaseous fuels require less percentage of excess air for combustion as compared to liquid fuels

Strongly caking coal should not be used in the Lurgi gasifier

Water gas is called blue gas because of the color of the flame, when it is burnt

37 / 50

Phosphoric acid is prepared from_______?

None of these

Chalcopyrite

Rock phosphate

Cryolite

38 / 50

Phthalic anhydride is produced by the oxidation of __________?

Toluene

Naphthalene

Benzene

Aniline

39 / 50

Polycaprolactam is commercially known as_____?

Nylon-6

Nylon-66

Rayon

Dacron

40 / 50

Pick out the wrong statement. Iodine value of an oil or fat is_________?

Independent of the type of oil, whether it is drying or non-drying

Helpful in findings its adulteration & its suitability for making soap

A measure of its unsaturation

The number of grams of iodine taken up by 100 gm of oil or fat

41 / 50

Pick out the wrong statement?

Decomposition of sulphuric acid on heating does not start before its boiling

Conversion of SO2 to SO3 in Monsanto-4 pass converter is about 98%

Vitriol oil is nothing but technical sulphuric acid

The chemical formula of oleum is H2S2O7, which is formed by saturating sulphuric acid with sulphur trioxide

42 / 50

Pick out the endothermic reaction out of the following ?

CO + 3H2 = CH4 + H2O

CaCO3 = CaO + CO2

CO + ?O2 = CO2

C+ ?O2 = CO

43 / 50

Presence of sodium tripolyphosphate (an additive) in synthetic detergent_____?

Facilitates its use even in hard water (by sequestering the water-hardening Ca & Mg ions)

Inhibits its corrosive effects

Does not allow redeposition of dirt on the cleaned surface

None of these

44 / 50

Pick out the wrong statement ?

Lead azide is a popular military explosive

TNT is a hygroscopic explosive having very high melting point and is non-toxic to human being

Gun powder comprises of 75% salt petre, 15% charcoal and 10% sulphur

Low intensity explosives are also called propellants, whereas high intensity explosive are called detonators

45 / 50

Production of one ton of dry paper pulp requires about _____ tons of bamboo or wood?

2.5

46 / 50

Production of one ton of cement requires about ________ tons of limestone ?

3.8

2.2

1.2

0.6

47 / 50

Phthalic anhydride is used______?

As plasticisers

For making nylon-6

In insecticides manufacture

In making PVC

48 / 50

Plaster of Paris is ___________?

Same as gypsum

CaSO4.?H2O

Used for setting of broken bones

Both A. and B.

49 / 50

Plasticisers are added to paints to________?

Make it corrosion resistant

Give elasticity & prevent cracking of the film

Increase atmospheric oxidation

Make glossy surface

50 / 50

Pick out the true statement pertaining to water treatment ?

Application of activated carbon reduces the temporary hardness of water

Slow sand filters can remove colour completely

Normally, the turbidity is removed by adding a coagulant prior to sedimentation

Activated carbon can be used for taste & odour control without subsequent filtration

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