CHEMICAL PROCESS Flashcards
Oxidation of SO2 to SO3 is favoured 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
Which of the following sugars is the sweetest?
FRUCTOSE
Salt cake is chemically represented by
Na2SO4
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
Gelatine which is a nitrogenous organic protein is obtained by the hydrolysis of
callagen
The chamber process is
NONE OF THESE HAHA
Sucrose content in the raw juice extracted from sugar cane is about __________ percent.
15-20
Fusel oil is a
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
Poorer tensile strength.
poorer resistance to oxidation.
greater amount of heat build-up under heavy loading.
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
enzyme
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-metal-lic compound ?
Tetra-ethyl-lead
Sulphur addition in soap is done to
cure pimples & dandruff.
Phosphate rock is a raw material for the manufacture of
phosphoric acid
phosphorous
superphosphates
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
poor oxidation stability and high gum forming tendency.
greater tendency of decomposition at elevated temperature.
hydrolysis tendency in presence of water.
Which of the following is not a raw material used for the manufacture of ordinary glass?
iron oxide
Esterification reaction
produces soap.
is reversible.
is a reaction between an alcohol and an organic acid.
In sulphate pulp manufacture, the pressure and temperature in the digestor is
10 atm, 170-180C
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
NaCl
Pick out the endothermic reaction out of the following.
C+O2 = CO
CO + 3H2 = CH4 + H2O
CaCO3 = CaO + CO2
CO +O2 = CO2
C
Pasteurisation 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
Polycaprolactum 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 tubes
Calgon used in water treatment is chemically
sodium hexametaphosphate
Which oil is preferred for paint manufacture ?
drying oil
Styrene butadiene rubber (SBR) is
synthetic polymer
Ethylene oxide is produced by oxidation of ethylene in presence of AgO catalyst at
5 atm & 275°C
Glycerine is used in the
manufacture of explosive.
conditioning and humidification of tobacco.
manufacture of pharmaceuticals.
Cumene is the starting material for the production of
phenol and acetone
The type of high refractive index glass used in optical instruments is __________ glass.
flint
Oxidation of ortho-xylene in presence of __________ catalyst is done to produce phthalic anhydride on commercial scale.
vanadium
Most commonly used rubber vulcanising agent is
sulphur
Terylene is
same as dacron
a polyester
Free alkali in a toilet soap is __________ that in a laundary shop.
<
Dehydrogenation of isopropanol produces
acetone
Pick out the wrong statement.
A. Eosin requirement in tallow soap is about 40-50% which fastens the lather formation, softens the hard soaps and increases its cleansing action.
B. Soap powder is prepared by mixing soap with hydrated sodium carbonate.
C. Detergents differ from soaps in their action in hard water.
D. Tarnish inhibitor (e.g., benzotriazole) is added in soap to facilitate the removal of stains due to tea, blood etc.
d
Concentration of hydrogen peroxide is done by
vacuum crystallization
Helium is produced on commercial scale from
natural gas
Fermentation of molasses to produce ethyl alcohol is done at __________ °C
20-30
The catalyst used in the manufacture of DDT is
20% oleum
Most widely and commonly used coagulant for the removal of suspended impurities in water is
alum
__________ is used as a catalyst in fat splitting.
Zno
Which of the following is produced on commercial scale from sea water?
Bromine.
Magnesium compounds.
Potassium compounds.
Heating of __________ to 120°C, produces plaster of paris.
gypsum
Pick out the wrong statement.
A. Conversion of SO2 to SO3 in Monsanto-4 pass converter is about 98%.
B. The chemical formula of oleum is H2S2O7, which is formed by saturating sulphuric acid with sulphur trioxide.
C. Vitriol oil is nothing but technical sulphuric acid.
d. Decomposition of sulphuric acid on heating does not start before its boiling.
d
Which of the following has sodium bicarbonate as its main constituent ?
baking powder
Ordinary glass is not a/an
material with sharp definite melting point.
In premitive days, __________ was being manufactured by Leblanc Process.
soda ash
The only commercial Fischer-Tropsch plant for producing liquid hydrocarbon fuel from coal is located at
SASOL (in South Africa).
Lurgi coal gasifier is a pressurised __________ bed reactor.
moving
Oils are partially hydrogenated (not fully) to manufacture vanaspati, because fully saturated solidified oils
cause cholesterol build up and blood clotting
Paper grade bamboo contains about __________ percent cellulose.
5
Carboxymethyl cellulose (CMC) is added in detergents to act as a/an
anti soil redeposition agent
Vulcanisation of rubber
converts its plasticity into elasticity.
Raw materials for ‘Solvay Process’ for manufacture of the soda ash are
salt, limestone and coke or gas.
Chloral is used in the manufacture of
DDT
Bromine is used in the preparation of
fire extinguishing compounds.
fire proofing agents.
dyes and antiknock compounds.
Sudden temperature fluctuation does not affect pyrex glass, because of its
low co-efficient of expansion.
The process used for the manufacture of ethyl alcohol from molasses is
NONE OF THESE SKSKSKS
Most easily and cheaply available fibrous raw material for paper manufacture available in India is bamboo. The yield of pulp produced from fibrous raw material by mechanical process is about __________ percent.
<10
Absorption of SO3 in 97% H2SO4 is
EXOTHERMIC
__________ process is used for the commercial production of nitric acid by the catalytic oxidation of ammonia.
OSTWALD’S
Sulphuric acid solution having a specific gravity of 1.20 at room temperature is used mainly for the
CAR BATTERY SOLUTION
The catalyst used in the production of elemental sulphur from H2S (by oxidation-reduction) is
ALUMINA
A good quality coal should have
NONE OF THSE
Zeolite used in water softening process (cation exchange) is regenerated by washing with
BRINE
The catalyst used in shift converter is
Ni
Which of the following is a detergent ?
Alkyl benzene sulphonate
Drinking (potable) water treatment does not involve
softening
Phenol formaldehyde resin is used as an adhesive in making
laminates
Pick out the correct statement.
A fat is converted into oil by its hydrogenation.
There is no difference between a fat and an oil so far as its physical properties are concerned.
All vegetable oils except coconut oil, contains fatty acids having more than sixteen carbon atoms.
Vegetable oils are classified as drying, non-drying and semi drying oils depending upon their fatty acids content.
All vegetable oils except coconut oil, contains fatty acids having more than sixteen carbon atoms.
DDT should not be allowed to come in contact with iron (during its manufacture) to
avoid its decomposition
Catalyst used in the manufacture of sulphuric acid by chamber & contact processes are respectively
oxides of nitrogen & V2O5 on a porous carrier.
