cannot yield textile grade fibre.

cannot be made from sulphite pulp.

utilises H2SO4, NaOH and CS2 during its manufacture.

cannot yield textile grade fibre.

Function of thinner in a paint is to

accelerate the oxidation of oil.

suspend pigments & dissolve film forming materials.

High purity nitrogen is used in

making protective gas (95% N2 + 5% H2) for annealing of cold rolled steel strip coils.

DDT should not be allowed to come in contact with iron (during its manufacture) to

prevent sulphonation of the monochlorobenzene by the acid catalyst.

achieve non-hygroscopic property.

Hydrazine is largely used

as a starting material for 'hypo'.

Rosin soap is added during paper manufacture to

impart resistance to penetration by liquids.

Nylon 66 is so named because the

number of carbon atoms between two nitrogen atoms are 6.

average degree of polymerisation of the polymer is 1966.

number of carbon atoms between two nitrogen atoms are 6.

number of nitrogen atoms between two carbon atoms are 6

polymer was first synthesised in 1966.

Fluorescent dyes are added in detergents to

attain distinctiveness from other brands.

act as fabric brightener (by converting ultraviolet light to visible light) thereby improving the whiteness appearance of white fabrics.

attain distinctiveness from other brands.

act as tarnish inhibitor for metals like German silver.

Highly porous refractory bricks are

less susceptible to chemical attack by molten fluxes and gases etc.

having very high thermal conductivity.

Oils are partially hydrogenated (not fully) to manufacture vanaspati, because fully saturated solidified oils

cause cholesterol build up and blood clotting.

always contain some amount of nickel (as their complete removal is very difficult).

have affinity to retain harmful sulphur compounds.

Hydrogenation of edible vegetable oils

is done in presence of nickel catalyst.

Sizing material is incorporated in paper to

impart resistance to penetration by liquids.

increase its flexibility & opacity.

Transparent soaps (e.g. Pears) are

metallic soaps with frothing agent and free stearic acid to achieve transparency.

usually soft soap (made from coconut oil) in which cane sugar & alcohol are added and finally washed with methylated spirit to achieve transparency.

metallic soaps with frothing agent and free stearic acid to achieve transparency.

metallic soaps with frothing agent from which glycerine has not been recovered.

Nickel is not used as a catalyst in the

Ostwald's process of HNO3 manufacture.

The purpose of adding Na2CO3 to water of low alkalinity is to

increase the softening capacity of zeolite.

permit the use of alum as a coagulant.

increase the softening capacity of zeolite.

facilitate easy regeneration of zeolite.

Saponification number of an oil or fat

gives an idea about its molecular weight.

is inversely proportional to its molecular weight.

Nylon 6-6 is manufactured from

hexamethylene diamine and maleic anhydride.

hexamethylene diamine and adipic acid.

hexamethylene diamine and maleic anhydride.

dimethyl terephthalate and ethylene glycol.

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

low co-efficient of thermal expansion.

high electrical insulation properties.

low co-efficient of thermal expansion.

compressive strength much greater than their tensile strengths.

Triple superphosphate is manufactured by reacting

phosphate rock with sulphuric acid.

phosphate rock with phosphoric acid.

phosphate rock with sulphuric acid.

phosphate rock with nitric acid.

ammonium phosphate with phosphoric acid.

595 + Mcqs in Chemical Process in Chemical Engineering Page 1 McqOptions

1.	Na2CO3 is called
A.	washing soda
B.	soda ash
C.	plaster of paris
D.	calcite
Answer» C. plaster of paris

Discussion

2.	Viscose rayon
A.	cannot be made from sulphite pulp.
B.	utilises H2SO4, NaOH and CS2 during its manufacture.
C.	cannot yield textile grade fibre.
D.	none of these.
Answer» C. cannot yield textile grade fibre.

Discussion

3.	Function of thinner in a paint is to
A.	accelerate the oxidation of oil.
B.	prevent gelling of the paint.
C.	suspend pigments & dissolve film forming materials.
D.	form a protective film.
Answer» D. form a protective film.

Discussion

4.	High purity nitrogen is used in
A.	making protective gas (95% N2 + 5% H2) for annealing of cold rolled steel strip coils.
B.	fire fighting purposes.
C.	both (a) & (b).
D.	neither (a) nor (b).
Answer» D. neither (a) nor (b).

Discussion

5.	DDT should not be allowed to come in contact with iron (during its manufacture) to
A.	avoid its decomposition.
B.	prevent sulphonation of the monochlorobenzene by the acid catalyst.
C.	achieve non-hygroscopic property.
D.	none of these.
Answer» B. prevent sulphonation of the monochlorobenzene by the acid catalyst.

Discussion

6.	Metallic soap is __________ salt of fatty acids.
A.	sodium
B.	potassium
C.	both sodium & potassium
D.	aluminium or calcium
Answer» E.

Discussion

7.	Which of the following processes is absent in glass manufacturing process ?
A.	Sintering
B.	Annealing
C.	Shaping or forming
D.	Melting
Answer» B. Annealing

Discussion

8.	A bio-catalyst produced by living cells which acts independent of the cell is called a/an
A.	substrate
B.	enzyme
C.	nutrient
D.	none of these
Answer» C. nutrient

Discussion

9.	Hydrazine is largely used
A.	as a starting material for 'hypo'.
B.	in photographic industry.
C.	as rocket fuel.
D.	in printing industry.
Answer» D. in printing industry.

Discussion

10.	Rosin soap is added during paper manufacture to
A.	impart adhesive properties.
B.	improve opacity.
C.	impart resistance to penetration by liquids.
D.	none of these.
Answer» D. none of these.

Discussion

11.	Nylon 66 is so named because the
A.	average degree of polymerisation of the polymer is 1966.
B.	number of carbon atoms between two nitrogen atoms are 6.
C.	number of nitrogen atoms between two carbon atoms are 6
D.	polymer was first synthesised in 1966.
Answer» B. number of carbon atoms between two nitrogen atoms are 6.

Discussion

12.	20% oleum means that in 100 kg oleum, there are 20 kg of
A.	SO3 and 80kg of H2SO4.
B.	H2SO4 and 80kg of SO3.
C.	SO3 for each 100 kg of H2SO4.
D.	none of these.
Answer» B. H2SO4 and 80kg of SO3.

Discussion

13.	Fluorescent dyes are added in detergents to
A.	act as fabric brightener (by converting ultraviolet light to visible light) thereby improving the whiteness appearance of white fabrics.
B.	attain distinctiveness from other brands.
C.	act as tarnish inhibitor for metals like German silver.
D.	none of these
Answer» B. attain distinctiveness from other brands.

Discussion

14.	Finely ground calcium aluminate & silicate is a/an
A.	cermet
B.	cement
C.	abrasive
D.	explosive
Answer» C. abrasive

Discussion

15.	Which of the following additives/water proofing agents is added to lower the hydrophilic (moisture loving) characteristic of cement ?
A.	Xanthates
B.	Stearic acid
C.	Calcium & aluminium stearate
D.	Formic acid
Answer» D. Formic acid

Discussion

16.	Which allotrope of sulphur is insoluble in carbon disulphide ?
A.	Rhombic sulphur
B.	Monoclinic sulphur
C.	Plastic sulphur
D.	Milk of sulphur
Answer» D. Milk of sulphur

Discussion

17.	The most commonly used substance to speed up the sedimentation of sewage is
A.	lime
B.	sulphuric acid
C.	chlorine
D.	sodium bisulphite
Answer» B. sulphuric acid

Discussion

18.	Which of the following is used as a binding material in soap to improve soap texture ?
A.	Rosin
B.	Borax
C.	Benzyl acetate
D.	Sodium carbonate
Answer» C. Benzyl acetate

Discussion

19.	Highly porous refractory bricks are
A.	less susceptible to chemical attack by molten fluxes and gases etc.
B.	very strong.
C.	having very high thermal conductivity.
D.	none of these.
Answer» E.

Discussion

20.	Oils are partially hydrogenated (not fully) to manufacture vanaspati, because fully saturated solidified oils
A.	cause cholesterol build up and blood clotting.
B.	are prone to rancid oxidation.
C.	always contain some amount of nickel (as their complete removal is very difficult).
D.	have affinity to retain harmful sulphur compounds.
Answer» B. are prone to rancid oxidation.

Discussion

21.	Bromides contained in hot mother liquor is treated with __________ during manufacture of bromine from sea water.
A.	SO3
B.	Cl2
C.	NH3
D.	SO2
Answer» C. NH3

Discussion

22.	How much temperature is maintained during quicklime manufacture in the calcination zone of the vertical shaft kiln?
A.	500¬∞C
B.	750¬∞C
C.	1000¬∞C
D.	1500¬∞C
Answer» D. 1500¬∞C

Discussion

23.	In nylon-66, the first and second numbers (i.e., 6) respectively designate the number of carbon atoms present in the
A.	diamine and the ring.
B.	dibasic acid and the ring.
C.	diamine and the dibasic acid.
D.	none of these.
Answer» D. none of these.

Discussion

24.	A 'unit process' is exemplified by the
A.	distillation
B.	hydrogenation of oils
C.	absorption
D.	humidification
Answer» C. absorption

Discussion

25.	Hydrogenation of edible vegetable oils
A.	is an exothermic reaction.
B.	increases their melting point.
C.	is done in presence of nickel catalyst.
D.	all (a), (b) and (c).
Answer» E.

Discussion

26.	Trinitrotoluene (TNT), an explosive, is made by the nitration of
A.	nitrobenzene
B.	toluene
C.	nitrotoluene
D.	benzene
Answer» C. nitrotoluene

Discussion

27.	Hollander beater used during paper pulp manufacture does not facilitate the __________ of fibre.
A.	cutting
B.	fibrillation
C.	hydration
D.	strengthening
Answer» E.

Discussion

28.	The product obtained on mixing calcium oxide with water is called
A.	quicklime
B.	slaked lime
C.	milk of lime
D.	none of these
Answer» C. milk of lime

Discussion

29.	Ca(OH)2 is called
A.	quicklime
B.	slaked lime
C.	limestone
D.	gypsum
Answer» C. limestone

Discussion

30.	Coagulant is used __________ filtration.
A.	before
B.	after
C.	during
D.	to avoid
Answer» B. after

Discussion

31.	Average sulphur content in Indian pyrites is about __________ percent.
A.	15
B.	35
C.	55
D.	70
Answer» C. 55

Discussion

32.	The basic constituent of vegetable oils is
A.	triglyceride
B.	fatty acids
C.	fatty alcohol
D.	mono esters
Answer» B. fatty acids

Discussion

33.	Sizing material is incorporated in paper to
A.	impart resistance to penetration by liquids.
B.	increase its thickness.
C.	increase its flexibility & opacity.
D.	increase its brightness.
Answer» B. increase its thickness.

Discussion

34.	Catalyst used during the manufacture of 'Vanaspati Ghee' is
A.	zinc
B.	nickel
C.	platinum
D.	copper
Answer» C. platinum

Discussion

35.	Transparent soaps (e.g. Pears) are
A.	usually soft soap (made from coconut oil) in which cane sugar & alcohol are added and finally washed with methylated spirit to achieve transparency.
B.	metallic soaps with frothing agent and free stearic acid to achieve transparency.
C.	metallic soaps with frothing agent from which glycerine has not been recovered.
D.	none of these.
Answer» B. metallic soaps with frothing agent and free stearic acid to achieve transparency.

Discussion

36.	Nickel is not used as a catalyst in the
A.	Fischer-Tropsch process.
B.	shift conversion.
C.	hydrogenation of oil.
D.	Ostwald's process of HNO3 manufacture.
Answer» E.

Discussion

37.	In premitive days, __________ was being manufactured by Leblanc Process.
A.	alum
B.	washing soda
C.	soda ash
D.	calcium carbide
Answer» D. calcium carbide

Discussion

38.	The purpose of tanning in leather industry is to
A.	stiffen the leather.
B.	smoothen the leather.
C.	make it flexible.
D.	impart water resistance.
Answer» B. smoothen the leather.

Discussion

39.	Helium is produced on commercial scale from
A.	air
B.	natural gas
C.	coke oven gas
D.	none of these
Answer» C. coke oven gas

Discussion

40.	The purpose of adding Na2CO3 to water of low alkalinity is to
A.	permit the use of alum as a coagulant.
B.	increase the softening capacity of zeolite.
C.	facilitate easy regeneration of zeolite.
D.	all (a), (b) and (c).
Answer» B. increase the softening capacity of zeolite.

Discussion

41.	Sea weeds are an important source of
A.	fluorine
B.	chlorine
C.	bromine
D.	iodine
Answer» E.

Discussion

42.	Impurities present in brine is normally removed by treatment with
A.	NH3 and CO2.
B.	lime and soda ash.
C.	lime, ammonia and carbon.
D.	all (a), (b) and (c).
Answer» E.

Discussion

43.	Manufacture of phthalic anhydride uses __________ as a catalyst.
A.	Ni
B.	Cr
C.	V2O5
D.	Al2O3
Answer» D. Al2O3

Discussion

44.	Which of the following is not responsible for causing permanent hardness of water ?
A.	Ca(HCO3)2
B.	CaCl2
C.	MgCl2
D.	none of these
Answer» B. CaCl2

Discussion

45.	Saponification number of an oil or fat
A.	gives an idea about its molecular weight.
B.	is inversely proportional to its molecular weight.
C.	detects its adulteration.
D.	all (a), (b) & (c).
Answer» E.

Discussion

46.	Nylon 6-6 is manufactured from
A.	hexamethylene diamine and adipic acid.
B.	hexamethylene diamine and maleic anhydride.
C.	caprolactum.
D.	dimethyl terephthalate and ethylene glycol.
Answer» B. hexamethylene diamine and maleic anhydride.

Discussion

47.	Pick out the wrong statement pertaining to the properties of glasses. Glasses generally have
A.	high electrical insulation properties.
B.	sharp melting points.
C.	low co-efficient of thermal expansion.
D.	compressive strength much greater than their tensile strengths.
Answer» C. low co-efficient of thermal expansion.

Discussion

48.	Oxidation of ortho-xylene in presence of __________ catalyst is done to produce phthalic anhydride on commercial scale.
A.	nickel
B.	vanadium
C.	alumina
D.	iron
Answer» C. alumina

Discussion

49.	__________ process is used for the commercial production of nitric acid by the catalytic oxidation of ammonia.
A.	Solvay
B.	Ostwald's
C.	Haber's
D.	none of these
Answer» C. Haber's

Discussion

50.	Triple superphosphate is manufactured by reacting
A.	phosphate rock with phosphoric acid.
B.	phosphate rock with sulphuric acid.
C.	phosphate rock with nitric acid.
D.	ammonium phosphate with phosphoric acid.
Answer» B. phosphate rock with sulphuric acid.

Discussion

Explore topic-wise MCQs in Chemical Engineering.

Na2CO3 is called

Viscose rayon

Function of thinner in a paint is to

High purity nitrogen is used in

DDT should not be allowed to come in contact with iron (during its manufacture) to

Metallic soap is __________ salt of fatty acids.

Which of the following processes is absent in glass manufacturing process ?

A bio-catalyst produced by living cells which acts independent of the cell is called a/an

Hydrazine is largely used

Rosin soap is added during paper manufacture to

Nylon 66 is so named because the

20% oleum means that in 100 kg oleum, there are 20 kg of

Fluorescent dyes are added in detergents to

Finely ground calcium aluminate & silicate is a/an

Which of the following additives/water proofing agents is added to lower the hydrophilic (moisture loving) characteristic of cement ?

Which allotrope of sulphur is insoluble in carbon disulphide ?

The most commonly used substance to speed up the sedimentation of sewage is

Which of the following is used as a binding material in soap to improve soap texture ?

Highly porous refractory bricks are

Oils are partially hydrogenated (not fully) to manufacture vanaspati, because fully saturated solidified oils

Bromides contained in hot mother liquor is treated with __________ during manufacture of bromine from sea water.

How much temperature is maintained during quicklime manufacture in the calcination zone of the vertical shaft kiln?

In nylon-66, the first and second numbers (i.e., 6) respectively designate the number of carbon atoms present in the

A 'unit process' is exemplified by the

Hydrogenation of edible vegetable oils

Trinitrotoluene (TNT), an explosive, is made by the nitration of

Hollander beater used during paper pulp manufacture does not facilitate the __________ of fibre.

The product obtained on mixing calcium oxide with water is called

Ca(OH)2 is called

Coagulant is used __________ filtration.

Average sulphur content in Indian pyrites is about __________ percent.

The basic constituent of vegetable oils is

Sizing material is incorporated in paper to

Catalyst used during the manufacture of 'Vanaspati Ghee' is

Transparent soaps (e.g. Pears) are

Nickel is not used as a catalyst in the

In premitive days, __________ was being manufactured by Leblanc Process.

The purpose of tanning in leather industry is to

Helium is produced on commercial scale from

The purpose of adding Na2CO3 to water of low alkalinity is to

Sea weeds are an important source of

Impurities present in brine is normally removed by treatment with

Manufacture of phthalic anhydride uses __________ as a catalyst.

Which of the following is not responsible for causing permanent hardness of water ?

Saponification number of an oil or fat

Nylon 6-6 is manufactured from

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

Oxidation of ortho-xylene in presence of __________ catalyst is done to produce phthalic anhydride on commercial scale.

__________ process is used for the commercial production of nitric acid by the catalytic oxidation of ammonia.

Triple superphosphate is manufactured by reacting