Chemical Process Quiz 8

1 / 50

Plaster of Paris is ___________?

Same as gypsum

CaSO4.?H2O

Both A. and B.

Used for setting of broken bones

2 / 50

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

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

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

3 / 50

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

2.5

4 / 50

Pick out the wrong statement ?

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

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

Catalytic hydrogenation of carbon monoxide produces methyl alcohol

Raw materials for DDT manufacture are benzene and chlorine

5 / 50

Pick out the wrong statement ?

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

None of these

6 / 50

Pick out the wrong statement?

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

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

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

7 / 50

Pick out the wrong statement ?

Total sugar content in molasses is about 10%

Protein catalysts are called enzymes

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

8 / 50

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

Endothermic

Both B. and C.

Anaerobic

Aerobic

9 / 50

Pick out the false statement pertaining to water treatment ?

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

Water with pH value less than 7, is acidic

10 / 50

Pick out the exothermic reaction out of the following ?

MgCO3 = MgO + CO2

CaC2 + H2O = Ca(OH)2 + C2H2

All (A), B. and (C)

C + H2O = CO + H2

11 / 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

12 / 50

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

High cost

Fragile nature

All A, B. and C.

Easy poisoning tendency

13 / 50

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

Celluloid

Bakelite

Teflon

Dacron

14 / 50

Pick out the wrong statement ?

Oils and fats are alkaloids

Pasteurisation of milk involves moderate heating followed by cooling

Bakeries and breweries make use of yeasts

Enzyme is a complex nitrogenous compound

15 / 50

Process conditions in fermentator used for production of penicillin is______?

30?C, 200 mm Hg (absolute)

90?C, 45 atm

25?C, 2 atm

50?C, l0 atm

16 / 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

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

Colourless rosin is used in the manufacture of laundry soaps

17 / 50

Pick out the wrong statement pertaining to nitric acid ?

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

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

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

18 / 50

Polythene is a/an _______ polymerisation product?

Thermosetting

Condensation

Addition

None of these

19 / 50

Pick out the wrong statement ?

Acetylene gas cannot be used for illumination purpose

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

20 / 50

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

Compressive strength much greater than their tensile strengths

Low co-efficient of thermal expansion

High electrical insulation properties

Sharp melting points

21 / 50

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

Increases with the increasing flake size keeping the flake thickness constant

Decreases as the moisture content of flakes increases

Increases considerably with the rise of temperature

Decreases with decrease of thickness of the flakes

22 / 50

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

Arsenic

Carbon

Lead

Sulphur

23 / 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

24 / 50

Pick out the wrong statement?

Portland cement is made employing wet process

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

None of these

Gypsum is added to Portland cement to lengthen its setting time

25 / 50

Pick out the wrong statement?

Azoic dyes are mostly applied on cotton fabrics

None of these

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

Mordant dyes are applied mainly to wools

26 / 50

Phthalic anhydride is produced by the oxidation of __________?

Benzene

Naphthalene

Toluene

Aniline

27 / 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%

28 / 50

Phthalic anhydride is made by the ________?

Oxidation of naphthalene

Oxidation of benzene

None of these

Dehydrogenation of ethyl benzene

29 / 50

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

Easy removal of its hardness

None of these

Reduced softening capacity of zeolite

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

30 / 50

Plasticisers are added to paints to________?

Increase atmospheric oxidation

Make it corrosion resistant

Make glossy surface

Give elasticity & prevent cracking of the film

31 / 50

Prussian blue is chemically represented by___________?

AlF3 . 3NaF

Ca SO4 . 2H2O

FeO.TiO2

Fe4 [Fe (CN6)3]

32 / 50

Phosphoric acid is prepared from_______?

Cryolite

Rock phosphate

Chalcopyrite

None of these

33 / 50

Pick out the true statement pertaining to water treatment ?

Application of activated carbon reduces the temporary hardness of water

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

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

Slow sand filters can remove colour completely

34 / 50

Polyvinyl chloride (PVC) is______?

A thermosetting material

Made by employing emulsion polymerisation

A condensation polymerisation product

None of these

35 / 50

Pick out the endothermic reaction out of the following ?

C+ ?O2 = CO

CO + ?O2 = CO2

CO + 3H2 = CH4 + H2O

CaCO3 = CaO + CO2

36 / 50

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

Teflon

Epoxy resin

Polyurethane

Silicone

37 / 50

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

Inhibits its corrosive effects

Does not allow redeposition of dirt on the cleaned surface

None of these

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

38 / 50

Pick out the wrong statement ?

Bagasse fibre contains both lignin & cellulose

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

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

39 / 50

Phthalic anhydride is used______?

As plasticisers

In making PVC

In insecticides manufacture

For making nylon-6

40 / 50

Pick out the wrong statement ?

None of these

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

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

41 / 50

Potassium is kept & transported under _____ ?

Alcohol

Kerosene oil

Water

Liquid ammonia

42 / 50

Polycaprolactam is commercially known as_____?

Nylon-66

Rayon

Nylon-6

Dacron

43 / 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

44 / 50

Polymethyl methacrylate (PMMA) is known as ______?

Nylon-6

Teflon

Bakelite

Perspex

45 / 50

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

2.2

1.2

3.8

0.6

46 / 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.

Its calorific value is very less

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

47 / 50

Producer gas consists mainly of__________?

C2H2, CO2, H2

CO, CO2 N2, H2

CO, H2

H2, CH4

48 / 50

Portland cement consists mainly of___________?

SiO2 & Al2O3

CaO & Fe2O3

CaO & Al2O3

CaO & SiO2

49 / 50

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

Magnetite

Siderite

Hematite

Chalcopyrite

50 / 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

Increases the quantity of chlorine used for its purification

All A, B. and C.

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