Chemical Process Quiz 8

1 / 50

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

High electrical insulation properties

Compressive strength much greater than their tensile strengths

Low co-efficient of thermal expansion

Sharp melting points

2 / 50

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

Dacron

Teflon

Bakelite

Celluloid

3 / 50

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

Siderite

Chalcopyrite

Hematite

Magnetite

4 / 50

Plaster of Paris is ___________?

Used for setting of broken bones

CaSO4.?H2O

Same as gypsum

Both A. and B.

5 / 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

Total sugar content in molasses is about 10%

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

6 / 50

Pick out the exothermic reaction out of the following ?

All (A), B. and (C)

MgCO3 = MgO + CO2

CaC2 + H2O = Ca(OH)2 + C2H2

C + H2O = CO + H2

7 / 50

Pick out the wrong statement?

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

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

Red color is imparted to glass by addition of arsenic oxide

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

8 / 50

Polyvinyl chloride (PVC) is______?

Made by employing emulsion polymerisation

A condensation polymerisation product

A thermosetting material

None of these

9 / 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

Sulphur

Lead

10 / 50

Polythene is a/an _______ polymerisation product?

Thermosetting

Addition

Condensation

None of these

11 / 50

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

Anaerobic

Both B. and C.

Endothermic

Aerobic

12 / 50

Pick out the true statement pertaining to water treatment ?

Slow sand filters can remove colour completely

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

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

Application of activated carbon reduces the temporary hardness of water

13 / 50

Plasticisers are added to paints to________?

Give elasticity & prevent cracking of the film

Make glossy surface

Increase atmospheric oxidation

Make it corrosion resistant

14 / 50

Pick out the endothermic reaction out of the following ?

CO + ?O2 = CO2

CO + 3H2 = CH4 + H2O

C+ ?O2 = CO

CaCO3 = CaO + CO2

15 / 50

Plasticisers are added to synthetic plastics to______?

Improve workability during fabrication

Impart flexibility

All A, B. and C.

Develop new improved properties not present in the original resins

16 / 50

Pick out the wrong statement?

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

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

17 / 50

Potassium is kept & transported under _____ ?

Kerosene oil

Alcohol

Liquid ammonia

Water

18 / 50

Pick out the wrong statement ?

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

Presence of sodium sulphate in pulp makes the pulp bleachability poor

Bagasse fibre contains both lignin & cellulose

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

19 / 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

All A, B. and C.

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

20 / 50

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

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

Easy removal of its hardness

Reduced softening capacity of zeolite

None of these

21 / 50

Pick out the wrong statement ?

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

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

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

None of these

22 / 50

Polymethyl methacrylate (PMMA) is known as ______?

Teflon

Bakelite

Nylon-6

Perspex

23 / 50

Pick out the wrong statement?

Mordant dyes are applied mainly to wools

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

Azoic dyes are mostly applied on cotton fabrics

None of these

24 / 50

Polycaprolactam is commercially known as_____?

Dacron

Rayon

Nylon-66

Nylon-6

25 / 50

Pick out the wrong statement ?

None of these

Polymerisation temperature can modify the properties of SBR

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

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

26 / 50

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

A measure of its unsaturation

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

Helpful in findings its adulteration & its suitability for making soap

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

27 / 50

Pick out the false statement pertaining to water treatment ?

Water with pH value less than 7, is acidic

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

Aeration of water is effective in CO2 removal

Sodium sulphate or sodium carbonate do not cause hardness in water

28 / 50

Pick out the wrong statement pertaining to nitric acid ?

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

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

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

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

29 / 50

Pick out the wrong statement ?

Strongly caking coal should not be used in the Lurgi gasifier

Acetylene gas cannot be used for illumination purpose

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

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

30 / 50

Pick out the wrong statement pertaining to the soap manufacture?

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

Colourless rosin is used in the manufacture of laundry soaps

31 / 50

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

2.5

32 / 50

Pick out the wrong statement ?

Oils and fats are alkaloids

Bakeries and breweries make use of yeasts

Pasteurisation of milk involves moderate heating followed by cooling

Enzyme is a complex nitrogenous compound

33 / 50

Portland cement consists mainly of___________?

SiO2 & Al2O3

CaO & Al2O3

CaO & Fe2O3

CaO & SiO2

34 / 50

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

Teflon

Silicone

Polyurethane

Epoxy resin

35 / 50

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

Does not allow redeposition of dirt on the cleaned surface

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

Inhibits its corrosive effects

None of these

36 / 50

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

All A, B. and C.

Easy poisoning tendency

Fragile nature

High cost

37 / 50

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

Increases considerably with the rise of temperature

Decreases with decrease of thickness of the flakes

Decreases as the moisture content of flakes increases

Increases with the increasing flake size keeping the flake thickness constant

38 / 50

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

3.8

1.2

2.2

0.6

39 / 50

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

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

All A, B. and C.

Its calorific value is very less

Tar neutralises the residual acids present in pitch

40 / 50

Pick out the wrong statement?

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

None of these

Portland cement is made employing wet process

Gypsum is added to Portland cement to lengthen its setting time

41 / 50

Phthalic anhydride is produced by the oxidation of __________?

Aniline

Naphthalene

Toluene

Benzene

42 / 50

Process conditions in fermentator used for production of penicillin is______?

50?C, l0 atm

90?C, 45 atm

25?C, 2 atm

30?C, 200 mm Hg (absolute)

43 / 50

Producer gas consists mainly of__________?

C2H2, CO2, H2

CO, H2

H2, CH4

CO, CO2 N2, H2

44 / 50

Prussian blue is chemically represented by___________?

Fe4 [Fe (CN6)3]

Ca SO4 . 2H2O

FeO.TiO2

AlF3 . 3NaF

45 / 50

Phthalic anhydride is used______?

As plasticisers

In insecticides manufacture

For making nylon-6

In making PVC

46 / 50

Phosphoric acid is prepared from_______?

Chalcopyrite

Cryolite

Rock phosphate

None of these

47 / 50

Pick out the wrong statement ?

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

Lead azide is a popular military explosive

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

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

48 / 50

Phthalic anhydride is made by the ________?

Oxidation of naphthalene

Oxidation of benzene

Dehydrogenation of ethyl benzene

None of these

49 / 50

Pick out the wrong statement ?

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

Catalytic hydrogenation of carbon monoxide produces methyl alcohol

50 / 50

Pick out the wrong statement ?

Contact process of sulphuric acid manufacture uses nickel as the catalyst

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

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

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

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