Chemical Process Quiz 8

1 / 50

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

Low co-efficient of thermal expansion

Compressive strength much greater than their tensile strengths

Sharp melting points

High electrical insulation properties

2 / 50

Pick out the wrong statement?

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

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

3 / 50

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

Aerobic

Anaerobic

Endothermic

Both B. and C.

4 / 50

Pick out the wrong statement ?

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

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

Protein catalysts are called enzymes

5 / 50

Pick out the wrong statement ?

Enzyme is a complex nitrogenous compound

Bakeries and breweries make use of yeasts

Pasteurisation of milk involves moderate heating followed by cooling

Oils and fats are alkaloids

6 / 50

Pick out the exothermic reaction out of the following ?

MgCO3 = MgO + CO2

CaC2 + H2O = Ca(OH)2 + C2H2

C + H2O = CO + H2

All (A), B. and (C)

7 / 50

Process conditions in fermentator used for production of penicillin is______?

50?C, l0 atm

90?C, 45 atm

30?C, 200 mm Hg (absolute)

25?C, 2 atm

8 / 50

Polycaprolactam is commercially known as_____?

Dacron

Rayon

Nylon-66

Nylon-6

9 / 50

Phthalic anhydride is used______?

In insecticides manufacture

As plasticisers

For making nylon-6

In making PVC

10 / 50

Pick out the wrong statement ?

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

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

Acetylene gas cannot be used for illumination purpose

11 / 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

12 / 50

Pick out the wrong statement?

Portland cement is made employing wet process

None of these

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

13 / 50

Pick out the wrong statement?

None of these

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

Mordant dyes are applied mainly to wools

Azoic dyes are mostly applied on cotton fabrics

14 / 50

Pick out the wrong statement pertaining to the soap manufacture?

Transparent soaps are made by cold process

Organic pigments are used as colouring materials in the soap manufacture

Colourless rosin is used in the manufacture of laundry soaps

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

15 / 50

Phthalic anhydride is made by the ________?

None of these

Dehydrogenation of ethyl benzene

Oxidation of naphthalene

Oxidation of benzene

16 / 50

Pick out the wrong statement ?

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

Catalytic hydrogenation of carbon monoxide produces methyl alcohol

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

Raw materials for DDT manufacture are benzene and chlorine

17 / 50

Plasticisers are added to synthetic plastics to______?

Develop new improved properties not present in the original resins

Improve workability during fabrication

Impart flexibility

All A, B. and C.

18 / 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

19 / 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

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

A measure of its unsaturation

Helpful in findings its adulteration & its suitability for making soap

20 / 50

Pick out the endothermic reaction out of the following ?

CaCO3 = CaO + CO2

CO + ?O2 = CO2

CO + 3H2 = CH4 + H2O

C+ ?O2 = CO

21 / 50

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

2.5

22 / 50

Portland cement consists mainly of___________?

CaO & Al2O3

CaO & SiO2

CaO & Fe2O3

SiO2 & Al2O3

23 / 50

Phosphoric acid is prepared from_______?

Rock phosphate

Cryolite

Chalcopyrite

None of these

24 / 50

Polymethyl methacrylate (PMMA) is known as ______?

Perspex

Teflon

Bakelite

Nylon-6

25 / 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

26 / 50

Polyvinyl chloride (PVC) is______?

A condensation polymerisation product

Made by employing emulsion polymerisation

A thermosetting material

None of these

27 / 50

Pick out the wrong statement ?

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

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

None of these

28 / 50

Plasticisers are added to paints to________?

Make glossy surface

Increase atmospheric oxidation

Make it corrosion resistant

Give elasticity & prevent cracking of the film

29 / 50

Phthalic anhydride is produced by the oxidation of __________?

Aniline

Naphthalene

Benzene

Toluene

30 / 50

Pick out the wrong statement ?

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

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

Lead azide is a popular military explosive

31 / 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

Teflon

Silicone

32 / 50

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

3.8

0.6

1.2

2.2

33 / 50

Potassium is kept & transported under _____ ?

Kerosene oil

Liquid ammonia

Alcohol

Water

34 / 50

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

Easy removal of its hardness

None of these

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

Reduced softening capacity of zeolite

35 / 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%

36 / 50

Pick out the wrong statement pertaining to nitric acid ?

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

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

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

37 / 50

Polythene is a/an _______ polymerisation product?

Condensation

None of these

Thermosetting

Addition

38 / 50

Pick out the wrong statement ?

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

Bagasse fibre contains both lignin & cellulose

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

39 / 50

Producer gas consists mainly of__________?

H2, CH4

CO, H2

CO, CO2 N2, H2

C2H2, CO2, H2

40 / 50

Presence of carbonaceous matter in the sewage______?

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.

Increases the quantity of chlorine used for its purification

41 / 50

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

Easy poisoning tendency

All A, B. and C.

High cost

Fragile nature

42 / 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)

43 / 50

Plaster of Paris is ___________?

Used for setting of broken bones

Same as gypsum

Both A. and B.

CaSO4.?H2O

44 / 50

Pick out the wrong statement ?

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

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

Contact process of sulphuric acid manufacture uses nickel as the catalyst

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

45 / 50

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

Bakelite

Celluloid

Teflon

Dacron

46 / 50

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

Siderite

Magnetite

Hematite

Chalcopyrite

47 / 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

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

48 / 50

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

Its calorific value is very less

Tar neutralises the residual acids present in pitch

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

All A, B. and C.

49 / 50

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

Carbon

Sulphur

Lead

Arsenic

50 / 50

Prussian blue is chemically represented by___________?

FeO.TiO2

Fe4 [Fe (CN6)3]

AlF3 . 3NaF

Ca SO4 . 2H2O

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