Chemical Process Flashcards

(50 cards)

1
Q

Purest form of water

A

Rain water

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2
Q

With increase in temperature, the equilibrium constant at constant pressure (Kp) for oxidation of sulphur dioxide

A

decreases

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3
Q

Electrodeposition of metals i.e. electroplating is never done on

A

Refractories

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4
Q

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

A

strengthening

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5
Q

The biochemical treatment applied to sewage effluents is a process of

A

oxidation

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6
Q

Sucrose content in cane sugar may be around __________ percent.

A

95

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7
Q

Sweetest sugar

A

Fructose

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8
Q

Main use of HCl

A

drilling of petroleum and pickling of steel sheets

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9
Q

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

A

15-20

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10
Q

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

A

ZnO

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11
Q

Haemoglobin is a/an

A

protein

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12
Q

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

A

50

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13
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.

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14
Q

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

A

10 atm, 170-180 C

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15
Q

Frasch process is for

A

mining sulfur

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16
Q

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

A

coagulation

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17
Q

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

A

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

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18
Q

Calgon used in water treatment is chemically

A

sodium hexametaphosphate

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19
Q

Ethylene oxide is produced by oxidation of ethylene in presence of AgO catalyst at

A

5 atm & 275°C

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20
Q

Cumene is the starting material for the production of

A

phenol and acetone

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21
Q

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

22
Q

Dehydrogenation of isopropanol produces

23
Q

Concentration of hydrogen peroxide is done by

A

vacuum crystallisation

24
Q

Fermentation of molasses to produce ethyl alcohol is done at __________ °C

24
Coagulant for the removal of suspended impurities in water is
alum
25
__________ is used as a catalyst in fat splitting.
ZnO
25
Which of the following is not produced on commercial scale from sea water?
Sodium sulfate
26
Ordinary glass is not a/an
material with sharp definite melting point.
27
Leblanc Process.
soda ash
28
Lurgi coal gasifier is a pressurised __________ bed reactor.
moving
29
Carboxymethyl cellulose (CMC) is added in detergents to act as a/an
anti soil redeposition agent
30
Raw materials for 'Solvay Process' for manufacture of the soda ash are
salt, limestone and coke or gas.
31
__________ process is used for the commercial production of nitric acid by the catalytic oxidation of ammonia.
Ostwald's
32
Phenol formaldehyde resin is used as an adhesive in making
laminates
33
DDT
dichloro-diphenyl-trichloroethane
34
DDT should not be allowed to come in contact with iron (during its manufacture) to
avoid its decomposition.
35
Which of the following processes does not produce Cl2 as a co-product during the manufacture of caustic soda ?
Lime-soda process
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