Chemical Process Quiz 8

1 / 50

Polythene is a/an _______ polymerisation product?

Condensation

Thermosetting

Addition

None of these

2 / 50

Potassium is kept & transported under _____ ?

Kerosene oil

Alcohol

Liquid ammonia

Water

3 / 50

Plasticisers are added to synthetic plastics to______?

Improve workability during fabrication

Develop new improved properties not present in the original resins

Impart flexibility

All A, B. and C.

4 / 50

Pick out the wrong statement?

None of these

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

5 / 50

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

Polyurethane

Epoxy resin

Teflon

Silicone

6 / 50

Pick out the false statement pertaining to water treatment ?

Aeration of water is effective in CO2 removal

Water with pH value less than 7, is acidic

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

Sodium sulphate or sodium carbonate do not cause hardness in water

7 / 50

Phosphoric acid is prepared from_______?

None of these

Cryolite

Rock phosphate

Chalcopyrite

8 / 50

Plaster of Paris is ___________?

Same as gypsum

Both A. and B.

CaSO4.?H2O

Used for setting of broken bones

9 / 50

Pick out the wrong statement ?

None of these

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

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

10 / 50

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

Sharp melting points

Low co-efficient of thermal expansion

High electrical insulation properties

Compressive strength much greater than their tensile strengths

11 / 50

Phthalic anhydride is used______?

In making PVC

For making nylon-6

In insecticides manufacture

As plasticisers

12 / 50

Polymethyl methacrylate (PMMA) is known as ______?

Perspex

Bakelite

Nylon-6

Teflon

13 / 50

Pick out the wrong statement ?

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

Contact process of sulphuric acid manufacture uses nickel as the catalyst

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

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

14 / 50

Pick out the wrong statement pertaining to nitric acid ?

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

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

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

15 / 50

Plasticisers are added to paints to________?

Increase atmospheric oxidation

Make it corrosion resistant

Give elasticity & prevent cracking of the film

Make glossy surface

16 / 50

Pick out the exothermic reaction out of the following ?

MgCO3 = MgO + CO2

C + H2O = CO + H2

CaC2 + H2O = Ca(OH)2 + C2H2

All (A), B. and (C)

17 / 50

Prussian blue is chemically represented by___________?

Ca SO4 . 2H2O

FeO.TiO2

Fe4 [Fe (CN6)3]

AlF3 . 3NaF

18 / 50

Pick out the wrong statement ?

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

Lead azide is a popular military explosive

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

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

19 / 50

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

Helpful in findings its adulteration & its suitability for making soap

A measure of its unsaturation

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

20 / 50

Pick out the endothermic reaction out of the following ?

CaCO3 = CaO + CO2

CO + ?O2 = CO2

C+ ?O2 = CO

CO + 3H2 = CH4 + H2O

21 / 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 with the increasing flake size keeping the flake thickness constant

Increases considerably with the rise of temperature

22 / 50

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

Lead

Sulphur

Carbon

Arsenic

23 / 50

Pick out the wrong statement ?

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

Strongly caking coal should not be used in the Lurgi gasifier

24 / 50

Pick out the wrong statement ?

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

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

None of these

Polymerisation temperature can modify the properties of SBR

25 / 50

Pick out the wrong statement ?

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

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

26 / 50

Process conditions in fermentator used for production of penicillin is______?

30?C, 200 mm Hg (absolute)

50?C, l0 atm

25?C, 2 atm

90?C, 45 atm

27 / 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

28 / 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

29 / 50

Pick out the wrong statement ?

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

Catalytic hydrogenation of carbon monoxide produces methyl alcohol

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

30 / 50

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

Anaerobic

Endothermic

Both B. and C.

Aerobic

31 / 50

Pick out the wrong statement?

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

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

32 / 50

Pick out the true statement pertaining to water treatment ?

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

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

Slow sand filters can remove colour completely

Application of activated carbon reduces the temporary hardness of water

33 / 50

Phthalic anhydride is made by the ________?

Dehydrogenation of ethyl benzene

None of these

Oxidation of benzene

Oxidation of naphthalene

34 / 50

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

Bakelite

Teflon

Dacron

Celluloid

35 / 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

None of these

Easy removal of its hardness

Reduced softening capacity of zeolite

36 / 50

Polycaprolactam is commercially known as_____?

Nylon-66

Nylon-6

Rayon

Dacron

37 / 50

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

2.2

3.8

1.2

0.6

38 / 50

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

Inhibits its corrosive effects

None of these

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

Does not allow redeposition of dirt on the cleaned surface

39 / 50

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

Easy poisoning tendency

High cost

Fragile nature

All A, B. and C.

40 / 50

Producer gas consists mainly of__________?

CO, H2

H2, CH4

CO, CO2 N2, H2

C2H2, CO2, H2

41 / 50

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

Hematite

Chalcopyrite

Magnetite

Siderite

42 / 50

Pick out the wrong statement ?

Enzyme is a complex nitrogenous compound

Pasteurisation of milk involves moderate heating followed by cooling

Bakeries and breweries make use of yeasts

Oils and fats are alkaloids

43 / 50

Polyvinyl chloride (PVC) is______?

None of these

Made by employing emulsion polymerisation

A condensation polymerisation product

A thermosetting material

44 / 50

Pick out the wrong statement?

None of these

Portland cement is made employing wet process

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

Gypsum is added to Portland cement to lengthen its setting time

45 / 50

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

2.5

46 / 50

Portland cement consists mainly of___________?

CaO & SiO2

CaO & Al2O3

CaO & Fe2O3

SiO2 & Al2O3

47 / 50

Pick out the wrong statement ?

Protein catalysts are called enzymes

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

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___________?

Tar neutralises the residual acids present in pitch

Its calorific value is very less

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

All A, B. and C.

49 / 50

Pick out the wrong statement?

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

Vitriol oil is nothing but technical sulphuric acid

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

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

50 / 50

Phthalic anhydride is produced by the oxidation of __________?

Toluene

Benzene

Naphthalene

Aniline

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