Chemical Process Flashcards
Oxidation of SO2 to SO3 is favored by
low temperature and high pressure.
Gun powder, which is an explosive comprises of charcoal, Sulphur and
salt petre
Starting raw material for the manufacture of alum is
bauxite
Salt cake is chemically represented by
Na2SO4
sugars that is the sweetest
Fructose
Paper pulp produced by kraft/sulphate process is
strong fibrous
Claude process of gas liquefaction employs
adiabatic expansion against a piston or in a turbine.
The main use of HCl is in the
drilling of petroleum wells and pickling of steel sheets.
The gasification reaction represented by, C + H2O = CO + H2, is a/an __________ reaction.
endothermic
Viscose rayon is chemically
regenerated cellulose acetate
All enzymes are made of
proteins
The combustion reaction, C + O2 = CO2, is
exothermic
Styrene is produced from ethyl benzene by the process of
dehydrogenation
Gelatin which is a nitrogenous organic protein is obtained by the hydrolysis of
collagen
The chamber process is
none of these.
Sucrose content in the raw juice extracted from sugar cane is about __________ percent.
15 - 20
Fusel oil is a/an
mixture of higher molecular weight alcohols (a by-product obtained during production of alcohol from molasses).
Styrene-butadiene-rubber (SBR) as compared to natural rubber has
all (a), (b) and (c).
Co-efficient of thermal expansion of glass is decreased by the addition of __________ during its manufacture.
ZnO
The catalyst used in the manufacture of DDT (from chloral and chlorobenzene) is
oleum
Haemoglobin is a/an
protein
Epoxy resin
is a good adhesive.
Concentration of NaOH solution produced by mercury electrolytic cell is about __________ percent.
50
Which of the following is the most adverse factor challenging the choice of mercury electrolytic cell process for the production of caustic soda?
Pollution of water stream by mercury.
Esterification reaction produces
soap
Wood charcoal is used for decolouration of sugar, because it __________ the coloured materials.
adsorbs
Producer gas consists mainly of
CO, CO2 N2, H2
Neoprene is the trade name of
polychloroprene
Hard water
is not unfit for drinking purpose.
Which of the following is an organo-metallic compound ?
Tetra-ethyl lead
Sulphur addition in soap is done to
cure pimples & dandruff.
Phosphate rock is a raw material for the manufacture of
all (a), (b) and (c)
Mineral oils (e.g. petroleum oils) are preferred over fatty oils (e.g. mustard oil, ghee, tallow, palm oil, olive oil etc.) as a lubricant due to its
all (a), (b) and (c).
Which of the following is not a raw material used for the manufacture of ordinary glass?
Iron oxide
raw material used for the manufacture of ordinary glass?
all of the above
Esterification reaction
all of the above
In sulphate pulp manufacture, the pressure and temperature in the digestor is
10 atm., 170-180°C
Zeolite removes both temporary as well as permanent hardness of water by precipitating calcium and magnesium present in water as insoluble zeolites. Used zeolite is regenerated by flushing with the solution of
sodium chloride
Pick out the endothermic reaction out of the following
CaCO3 = CaO + CO2
Pasteurization of milk means
killing of organisms present in it by heating it at controlled temperature without changing its natural characteristics.
Fusion of bauxite and______produces high alumina cement
limestone
______process is used for the manufacture of sodium carbonate by ammonia soda process.
Solvay
Polycaprolactam is commercially known as
nylon-6
Frasch process is for
mining sulphur
Very fine suspended and colloidal impurities are removed from water by a process called
coagulation
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.
Which is the main reducing agent during production of iron from iron ore in a blast furnace
CO
The drug used in contraceptives is
mestranol
Raw materials used for producing______cement does not contain iron oxide.
white
In the Lurgi coal gasifier
large quantity of coal can be processed
Neon gas is
used in color discharge tube.
The compressive strength of cement should not be less than about 110Kg/cm2 after three days & not less than 170Kg/cm2 after seven days. The fineness of an ordinary cement as determined by turbidimetric method should be about______cm2/gm
1600
present in bagasse fibre
all of the above
Nitric acid is used in the manufacture of
all of the above
Naphthols are derivates of
naphthalene
Fermentation is adversely affected by the
high concentration.
Extraction of______employs an electrolytic process.
aluminum
Dichlorination of treated water is necessary to
remove chlorinous taste
Fire clay is______ refractory material.
→an acidic
An oil is converted into fat by its
hydrogenation
Production of one ton of cement requires about______ tons of limestone.
1.2
Low temperature carbonisation of coal takes place at______°C
700
Shaving soaps are
soft potassium soaps (potassium salt of fatty acid) with free stearic acid to give lather a lasting property.
Nylon-6 is a
polyamide
Enzymes are
all of the above
Multistage catalytic converter is not used in the
→NH3 synthesis reactio
The main product of high temperature carbonization of coal is
coke
______is a thermosetting plastic
epoxy polymer
In an integrated steel plant, NH3 present in coke oven gas is normally recovered as
(NH4)2SO4
Flexible foam (for mattresses) is usually made of
polyurethanes
Permanent hardness of water can be removed by
all of the above
Glycerin is a by-product of the______ industry.
Soap
Chalcopyrite is the main ore of
copper
One of the steps during refining of cane sugar consists of addition of hydrated lime to the sugar syrup followed by carbonation of the resulting solution. The purpose of this step is to
adjust the pH of the syrup
The end bleaching agent used to move last traces of colour bodies from the pulp is
→chlorine dioxide (ClO2)
Bio-degradable detergents
can be readily oxidized
Main constituent of limestone is
CaCO3
______is obtained as a by-product in the manufacture of sodium hydroxide using brine.
Chlorine
Sea water contains about______ ppm of bromine.
70
Which allotrope of Sulphur is insoluble in carbon disulphide ?Which allotrope of Sulphur is insoluble in carbon disulphide ?
Plastic sulphur
Lubricating greases are a mixture of
mineral oil, soap and additives
Metallic soap is______ salt of fatty acids.
aluminium or calcium
In contact process, SO3 is absorbed in 97% H2SO4 and not in water, because
water forms an acid mist, which is difficult to absorb
Cation exchanger is regenerated usually with
H2SO4
The most widely used coagulant for removing suspended impurities from water is
alum
Fat splitting catalyst is
ZnO
Phthalic anhydride is used
as plasticisers
Penicillin is separated from fermented broth by
extraction with amyl or butyl acetate
______process is used for producing soda ash.
→Solvay
Bleaching powder (chemically known as calcium chloro hypochlorite) is commercially produced by the action of chlorine on
slaked lime
unsaturated fatty acid
Oleic acid
The yield of tar from high temperature carbonization of dry coal is about______ percent.
3
______is used as a flux in the smelting of copper ore like chalcopyrite
silica/quartz
Phenol formaldehyde is produced by condensation polymerization. It is also known as
bakelite
Hydrogenation of oil does
all of the above
CaCl(OCl) is the chemical formula of
Bleaching powder
Main constituents of cotton fiber is
Celluose
Hydrolysis of sugar is called
inversion
Most suitable dye for synthetic fibers
Acid dye
Sulphuric acid completely saturated with sulphur trioxide is called
concentrated sulphuric acid
Fish contains about______percent oil
20%
he main aim behind cooling the digested chip at the bottom portion of the digestor by injecting cold black liquor is to
avoid mechanical weakening of fibre.
Polymethyl methacrylate (PMMA) is known as
perspex
Coloured glass is obtained by mixing of colored salts. Addition of______oxide is done to impart greenish blue color to the glass.
copper
Percentage of alcohol in beer may be around______percent
2-8 %
Which may be viewed as a catalyst in the manufacture of soda ash by Solvay process
NH3
High purity nitrogen is used in
- making protective gas (95% N2 + 5% H2) for annealing of cold rolled steel strip coils.
- fire fighting purposes
Commercial production of soda ash by Solvay process requires limestone, ______as raw materials
brine and coal
Naphthalene is removed from coke oven gas by
scrubbing with wash oil
In the manufacture of viscose rayon, the raw material used industrially is
→fine teak wood
Bordeaux mixture is a/an
inorganic fungicide
Silicone is a/an
inorganic polymer
Nickel is not used as a catalyst in the______ reaction.
shift conversion
Roasting of metallurgical ores is done mainly to
remove arsenic & sulphur.
Molasses is the starting material for the production of
alcohol
BHC (Benzene hexachloride) is made by the chlorination of benzene
which is an addition reaction.
Diaphragm electrolytic cell as compared to mercury electrolytic cell
requires lesser investment for similar capacity.
Calcareous & argillaceous materials are used in the manufacture of
cement
Commercial production of calcium carbide requires limestone and______ as raw materials
coke
likely to be a constituent of vegetable oils
all of the above
Nitroglycerene absorbed in wood flour, sodium nitrate or ammonium nitrate is commercially used as a controlled explosive called dynamite. The raw material used for its manufacture are glycerene, nitric acid and
sulphuric acid
The process involved in converting rubber into a thin sheet or coating it on fabric is called
Calendering
Detergent is produced by the sulphonation of dodecyl benzene, which is an______ reaction
- endothermic
- exothermic
Air used in aerobic fermentation must be sterilized, otherwise the
contamination of pure culture would result
Alkylbenzene sulfonate (ABS) is a
detergent
Alcohol content in freshly prepared natural and fortified wine may be respectively around______ percent.
7-14 and 14-30
