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DΔΥ 3 Gεnεral Εnginεεring > Chemical Process Industries [MRII] > Flashcards

Chemical Process Industries [MRII] Flashcards

1
Q

Catalysts used in the manufacture of sulfuric acid by chamber and contact processes are respectively

a. V2O5 and Cr2O3
b. Oxides of nitrogen and Cr2O3
c. V2O5 on a porous carrier and oxides of nitrogen
d. oxides of nitrogen and V2O5 on a porous carrier

A

d. oxides of nitrogen and V2O5 on a porous carrier

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2
Q

In contact process, SO3 is absorbed in 97% H2SO3
and not in water because

a. SO3 gas is sparingly soluble in water
b. water forms an acid mist which is difficult to absorb
c. the purity of acid is affected
d. scale formation in absorber is to be avoided

A

b. water forms an acid mist which is difficult to absorb

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3
Q

Contact process

a. yields acid of higher concentration than chamber process
b. yields acid of lower concentration than chamber process
c. is obsolete
d. eliminates absorber

A

a. yields acid of higher concentration than chamber process

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4
Q

20% oleum means that in 100 lb., there are 20 lb of

a. SO3 and 80 lb H2SO4
b. H2SO4 and 80 lb SO3
c. SO3 for each 100 lb of H2SO4
d. H2SO4 and 80 lb SO3

A

a. SO3 and 80 lb H2SO4

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5
Q

Producer gas consists mainly of

a. CO, CO2, N2, H2
b. CO, H2
c. H2, CH4
d. C2H2, CO2, H2

A

a. CO, CO2, N2, H2

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6
Q

Oxygen is produced by fraction of air using

a. Linde’s process
b. Claude’s process
c. both Linde’s and Claude’s process
d. Bayer’s process

A

c. both Linde’s and Claude’s process

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7
Q

Raw materials for “Solvay process” for manufacture of the soda ash are

a. salt, limestone, ammonia, and coke oven gas
b. ammonia, salt, and limestone
c. ammonia, limestone, and coke
d. ammonia, and coke oven gas

A

a. salt, limestone, ammonia, and coke oven gas

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8
Q

Economics of “Solvay process” depends upon the efficiency of

a. carbonating tower
b. ammonia recovery
c. ammonia recovery and size of plant
d. ammoniation of the salt solution

A

c. ammonia recovery and size of plant

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9
Q

Cement mainly contains

a. CaO, SiO2, Al2O3, Fe2O3
b. MgO, SiO2, K2O
c. Al2O3, MgO, Fe2O3
d. CaO, MgO, K2O

A

a. CaO, SiO2, Al2O3, Fe2O3

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10
Q

Gypsum is

a. calcium chloride
b. potassium sulfate
c. sodium sulfate
d. calcium sulfate

A

d. calcium sulfate

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11
Q

Glauber’s salt is

a. calcium sulfate
b. potassium sulfate
c. potassium chlorate
d. sodium sulfate decahydrate

A

d. sodium sulfate decahydrate

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12
Q

Permanent hardness of water is due to the presence of calcium and magnesium

a. bi-carbonates
b. sulfates and chlorides
c. carbonate
d. chlorides

A

b. sulfates and chlorides

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13
Q

Widely used method for conditioning of boiler feed water is

a. cold lime process
b. coagulation
c. hot-lime soda process
d. sequestration

A

c. hot-lime soda process

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14
Q

Hydrazine is largely used

a. as a starting material for “hypo”
b. in photographic industry
c. as rocket fuel
d. in printing industry

A

c. as rocket fuel

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15
Q

Trinitro-toluene is

a. used in glycerin manufacture
b. an explosive
c. used in dye manufacture
d. used in paint manufacture

A

b. an explosive

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16
Q

Oil is

a. a mixture of glycerides
b. a mixture of glycerides of fatty acids
c. solid at room temperature
d. esters of alcohols other than glycerin

A

b. a mixture of glycerides of fatty acids

17
Q

Wax is

a. a mixture of glycerides
b. a mixture of esters of polyhydric alcohols except glycerin
c. liquid at room temperature
d. a mixture of glycerides of fatty acids

A

b. a mixture of esters of polyhydric alcohols except glycerin

18
Q

Unsaturated oils compared to saturated oils have

a. lower melting point and higher reactivity to oxygen
b. higher melting point and higher reactivity to oxygen
c. lower melting point and lower reactivity to oxygen
d. higher melting point and lower reactivity to oxygen

A

a. lower melting point and higher reactivity to oxygen

19
Q

Rancidity of oil can be reduced by

a. decoloration
b. hydrogenation
c. oxidation
d. purification

A

b. hydrogenation

20
Q

Solvent used for the extraction of oil is

a. hexane
b. methyl ethyl ketone
c. furfural
d. benzene

A

b. methyl ethyl ketone

21
Q

Catalyst used in hydrogenation of oil is

a. nickel
b. platinum
c. iron
d. alumina

A

a. nickel

22
Q

Metallic soap is

a. sodium salt of fatty acids
b. potassium salt of fatty acids
c. both sodium and potassium of salt of fatty acids
d. aluminum or calcium salt of fatty acids

A

d. aluminum or calcium salt of fatty acids

23
Q

Fat splitting catalyst is

a. CaCO3
b. ZnO
c. Alumina
d. Iron

A

b. ZnO

24
Q

Free alkali in toilet soap is

a. less than that in a laundry soap
b. more than that in a laundry soap
c. same as that in a laundry soap
d. not present in laundry soap

A

a. less than that in a laundry soap

25
Q

Soap cannot be used with hard water because

a. hard water contains sulfate
b. they form insoluble calcium soaps which precipitate
c. they attach back the removed dirt
d. they increase the surface tension

A

b. they form insoluble calcium soaps which precipitate

26
Q

Builders are added in soap to

a. boost cleaning power
b. act as anti-redeposition agent
c. act as corrosion inhibitor
d. acts as fabric brightener

A

a. boost cleaning power

27
Q

Biodegradeable detergents

a. can be readily oxidized
b. pose problem in sewerage plant
c. have an isoparaffinic structure
d. should not be used as it spoils the cloth

A

a. can be readily oxidized

28
Q

Which of the following is a detergent?

a. fatty alcohol
b. alkyl benzene sulfonate
c. fatty acids
d. methyl chloride

A

b. alkyl benzene sulfonate

29
Q

Yellow glycerin is made into white using

a. activated carbon
b. diatomaceous earth
c. bauxite
d. bentonite

A

a. activated carbon

30
Q

Essential oils are usually obtained using

a. steam distillation
b. extractive distillation
c. solvent extraction
d. leaching

A

a. steam distillation

31
Q

Plasticizers are added to paints to

a. make it corrosion resistant
b. make glossy surface
c. give elasticity and prevent cracking of the film
d. increase atmospheric oxidation

A

c. give elasticity and prevent cracking of the film

32
Q

Function of thinner in a paint is to

a. accelerate the oxidation of oil
b. prevent gelling of the paint
c. suspend pigments and dissolve film-forming materials
d. form a protective film

A

c. suspend pigments and dissolve film-forming materials

33
Q

Varnish does not contain

a. pigment
b. thinner
c. dryer
d. anti-skinning agent

A

a. pigment

34
Q

Enamels

a. give good glossy finish
b. are same as varnish
c. are prepared from non-drying oil
d. do not contain pigment

A

a. give good glossy finish

DΔΥ 3 Gεnεral Εnginεεring (13 decks)

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