Chemical Process Quiz 8

1 / 50

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

Teflon

Celluloid

Bakelite

Dacron

2 / 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

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

3 / 50

Phthalic anhydride is made by the ________?

Oxidation of benzene

Dehydrogenation of ethyl benzene

None of these

Oxidation of naphthalene

4 / 50

Prussian blue is chemically represented by___________?

FeO.TiO2

Fe4 [Fe (CN6)3]

AlF3 . 3NaF

Ca SO4 . 2H2O

5 / 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

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

None of these

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

6 / 50

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

Lead

Arsenic

Sulphur

Carbon

7 / 50

Plaster of Paris is ___________?

Used for setting of broken bones

CaSO4.?H2O

Both A. and B.

Same as gypsum

8 / 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

9 / 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

10 / 50

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

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)

Inhibits its corrosive effects

11 / 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.

Tar neutralises the residual acids present in pitch

Its calorific value is very less

12 / 50

Polymethyl methacrylate (PMMA) is known as ______?

Teflon

Perspex

Nylon-6

Bakelite

13 / 50

Pick out the wrong statement ?

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

Total sugar content in molasses is about 10%

Protein catalysts are called enzymes

14 / 50

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

Anaerobic

Both B. and C.

Aerobic

Endothermic

15 / 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

Raw materials for DDT manufacture are benzene and chlorine

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

16 / 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

17 / 50

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

2.5

18 / 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

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

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

19 / 50

Pick out the wrong statement?

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

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

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

Vitriol oil is nothing but technical sulphuric acid

20 / 50

Presence of carbonaceous matter in the sewage______?

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

Reduces sulphate ions to sulphides causing obnoxious smell

Increases the quantity of chlorine used for its purification

All A, B. and C.

21 / 50

Potassium is kept & transported under _____ ?

Water

Alcohol

Liquid ammonia

Kerosene oil

22 / 50

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

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

A measure of its unsaturation

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

23 / 50

Pick out the true statement pertaining to water treatment ?

Slow sand filters can remove colour completely

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

24 / 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

25 / 50

Phthalic anhydride is produced by the oxidation of __________?

Toluene

Benzene

Aniline

Naphthalene

26 / 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

27 / 50

Phosphoric acid is prepared from_______?

Rock phosphate

None of these

Chalcopyrite

Cryolite

28 / 50

Pick out the exothermic reaction out of the following ?

All (A), B. and (C)

CaC2 + H2O = Ca(OH)2 + C2H2

C + H2O = CO + H2

MgCO3 = MgO + CO2

29 / 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%

Sodium sulphate or sodium carbonate do not cause hardness in water

Water with pH value less than 7, is acidic

Aeration of water is effective in CO2 removal

30 / 50

Pick out the wrong statement ?

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

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

Bagasse fibre contains both lignin & cellulose

31 / 50

Portland cement consists mainly of___________?

CaO & SiO2

CaO & Al2O3

SiO2 & Al2O3

CaO & Fe2O3

32 / 50

Polycaprolactam is commercially known as_____?

Dacron

Nylon-6

Rayon

Nylon-66

33 / 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

34 / 50

Polyvinyl chloride (PVC) is______?

A thermosetting material

A condensation polymerisation product

None of these

Made by employing emulsion polymerisation

35 / 50

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

Hematite

Siderite

Magnetite

Chalcopyrite

36 / 50

Plasticisers are added to synthetic plastics to______?

Develop new improved properties not present in the original resins

Impart flexibility

All A, B. and C.

Improve workability during fabrication

37 / 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

38 / 50

Polythene is a/an _______ polymerisation product?

Thermosetting

None of these

Condensation

Addition

39 / 50

Pick out the wrong statement?

Mordant dyes are applied mainly to wools

Azoic dyes are mostly applied on cotton fabrics

None of these

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

40 / 50

Pick out the wrong statement ?

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

Contact process of sulphuric acid manufacture uses nickel as the catalyst

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

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

41 / 50

Phthalic anhydride is used______?

In making PVC

In insecticides manufacture

As plasticisers

For making nylon-6

42 / 50

Producer gas consists mainly of__________?

C2H2, CO2, H2

H2, CH4

CO, CO2 N2, H2

CO, H2

43 / 50

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

0.6

1.2

2.2

3.8

44 / 50

Pick out the endothermic reaction out of the following ?

CO + ?O2 = CO2

CO + 3H2 = CH4 + H2O

CaCO3 = CaO + CO2

C+ ?O2 = CO

45 / 50

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

Low co-efficient of thermal expansion

Sharp melting points

Compressive strength much greater than their tensile strengths

High electrical insulation properties

46 / 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

47 / 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

Gypsum is added to Portland cement to lengthen its setting time

None of these

48 / 50

Pick out the wrong statement ?

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

Polymerisation temperature can modify the properties of SBR

None of these

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

49 / 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

All A, B. and C.

Fragile nature

50 / 50

Plasticisers are added to paints to________?

Make it corrosion resistant

Increase atmospheric oxidation

Make glossy surface

Give elasticity & prevent cracking of the film

Provide Your Information

NameEmailPhone Number

Your score is

The average score is 0%