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Chemical Process > Section 1 > Flashcards

Section 1 Flashcards

1
Q

Oxidation of SO2 to SO3 is favored by

A

low temperature and high pressure

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2
Q

Gun powder, which is an explosive comprises of charcoal, sulphur, and

A

salt petre

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3
Q

Starting raw material for the manufacture of alum is

A

Na2SO4

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4
Q

Which of the following sugars is the sweetest?

A

Fructose

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5
Q

Paper pulp produced by kraft /sulphate process is

A

strong fibrous

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6
Q

Claude process if gas liquifaction employs

A

adiabatic expansion against piston

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7
Q

The main use of hcl is in the

A

drilling of petroleum wells and pickling of steel sheets

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8
Q

The gasification reaction represented by, C+H2O = CO +H2, is a/an _______

A

endothermic

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9
Q

Viscose rayon is chemically known as

A

regenerated cellulose acetate

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10
Q

All enzymes are made of

A

proteins

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11
Q

The combustion reaction, C + O2 = CO2 is

A

exothermic

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12
Q

Styrene is produced from ethyl benzene by the process of

A

dehydrogenation

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13
Q

Gelatine which is a nitrogenous organic protein is obtained by the hydrolysis of

A

callagen

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14
Q

the chamber process is

A

none of these

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15
Q

Sucrose content in the raw juice extracted from sugar cane is about

A

15 - 20

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16
Q

Fussel oil is a/an

A

mixture of higher molecular weight alcohols(a by product obtained during production of alcohol molasses).

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17
Q

Styrene-butadiene-rubber (SBR) as compared to natural rubber has

A
  • poorer tensile strength
  • poorer resistance to oxidaion
  • greater amount of heat build - up under heavy loading
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18
Q

Co-efficient of thermal expansion of glass is decreased by the addition of _____ during its manufacture

A

ZnO (Zinc oxide)

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19
Q

The catalyst used in the manufacture of DDT (from chloral and chlorobenzene) is

A

oleum

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20
Q

Hemoglobin is a/an

A

protein

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21
Q

Epoxy resin

A

is a good adhesive

22
Q

salt cake is chemically represented by

A

Na2SO4

23
Q

Concentration of NaOH solution produced by mercury electrolytic cell is about ______ percent

A

50

24
Q

Which of the following is the most adverse factor challenging the choice of mercury electrolytic cell process for the production of caustic soda

A

Pollution of water stream by mercury

25
Q

Esterification reaction produces

A

soap

26
Q

Wood charcoal is used for decoloration of sugar, because it ________ the coloured materials

A

adsorbs

27
Q

Producer gas consists mostly of

A

CO, CO2, N2, H2

28
Q

Neoprene is the trade name of

A

polychlororene

29
Q

Hard water

A

is not unfit for drinking purposes

30
Q

Which of the following is an organometallic compound

A

Tetra-ethyl-lead

31
Q

Sulfur addition in soap is done to

A

cure pimples & dundruff

32
Q

Phosphate rock is raw material for the manufacture of

A
  • phosphoric acid
  • phosphorous
  • superphosphates
    Ans. All of the choices
33
Q

Mineral oils (eg. petroleum oils) are preferred over fatty acids (eg. mustard oil, ghee, tallow, palm oil, olive oil etc.) as lubricant due to its

A
  • poor oxidation stability and high gum forming tendency
  • greater tendency of decomposition at elevated temperature
  • hydrolysis tendency in presence of water
    Ans. All of the choices
34
Q

Which of the following is not a raw material used for the manufacture of ordinary glass?

A

Iron oxide

35
Q

Esterification reaction

A
  • produces soap
  • is reversible
  • is a reaction between an alcohol and an organic acid

Ans. All of the choices

36
Q

In sulphate manufacture, the pressure and temperature in the digestor is

A

10 atm; 170 - 180 oC

37
Q

Zeolites remove both temporary as well as permanent hardness of water by precipitating calcium and magnesium present in water as insoluble zeolites. Used zeolites are regenerated by flashing with the solution of

A

sodium chloride

38
Q

Pick out the endothermic reaction out of the following

A

CaCO3 = CaO + CO2

39
Q

Pasteurization of milk means

A

killing of organisms present in it by heating it at controlled temperature without change its natural characteristics

40
Q

Fusion of bauxite and _______ produces alumina cement.

A

limestone

41
Q

_______________ process is used for the manufacture of sodium carbonate by ammonia soda process

A

Solvay

42
Q

Polycaprolactum is commercially known as

A

nylon-6

43
Q

Frasch process is for

A

mining of sulphur

44
Q

Very fine suspended and colloidal impurities are removed from water by a process called

A

Coagulation

45
Q

Pitch (a product of coal and tar distillation) is always mixed with creosite oil, when it is to be burnt in a burner, because

A

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

46
Q

Which is the main reducing agent during the production of iron from iron ore in a blast furnace?

A

CO

47
Q

The drug used in contraceptives is

A

mestranol

48
Q

Raw materials used for producing ____________ cement does not contain iron oxide.

A

white

49
Q

In the lurgi coal gasifier

A

large quantity of coal can be processed

50
Q

Neon gas is

A

used in color discharge tube

Chemical Process (1 decks)

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