chem process (sec 2-5) Flashcards
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 not used in the
none of these fucker hahahahahah
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
sulphut
Terylene is
both a & b, dacron and polyester
Free alkali in a toilet soap is __________ that in a laundary shop.
less than
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 not produced on commercial scale from sea water?
sodium sulphate
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
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
ALL ( 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
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 these :)
Zeolite used in water softening process (cation exchange) is regenerated by washing with
brine
The catalyst used in shift converter is
nicket
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.
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.
DDT stands for
dichloro-diphenyl-trichloroethane.
Phosphoric acid is prepared from
rock phosphate
Metallic soap (e.g. aluminium or calcium salts of fatty acids) can be used
as a lubricant.
which of the following processes does not produce Cl2 as a co-product during the manufacture of caustic soda ?
Lime-soda process
Bleaching action of bleaching powder is due to its __________ properties.
oxidising
Solvent extracted oil
none of these.
Which of the following is not required in the manufacture of soda ash by Solvay process ?
Nitric acid
Saponification number of an oil or fat
all (gives an idea about its molecular weight.
is inversely proportional to its molecular weight.
detects its adulteration.)
The purpose of tanning in leather industry is to
stiffen the leather.
Lime and soda ash are added to water to remove
bicarbonates & sulphates of calcium and magnesium.
Kaoline is a/an
refractory material
Hydrogenation of edible vegetable oils
all (is an exothermic reaction.
increases their melting point.
is done in presence of nickel catalyst.)
Phenol is mainly used
to produce phenol formaldehyde.
Main constituent of dolomite is
MgCO3
Conversion of CO to CO2 by steam in presence of a catalyst is called
shift conversion.
Refractory bricks having high thermal conductivity is desirable, when it is to be used in the
recuperator
Bromides contained in hot mother liquor is treated with __________ during manufacture of bromine from sea water.
Cl2
Plasticisers are added to paints to
give elasticity & prevent cracking of the film.
Resistance to fusion of the refractory under a steady rising temperature condition is called
refractoriness
Portland cement consists mainly of
CaO & SiO2
__________ glass has the lowest co-efficient of thermal expansion and hence is more heat resistant.
Pyrex
The amount of benzene present in pure benzol is about __________ percent.
70
Cumene (isopropyl benzene) is made by
propylene alkylation of benzene.
Which of the following is not a pyrite ore?
Siderite
Mannheim furnace is used in the manufacture of
hydrochloric acid.
Thermosetting materials
are cross-linked molecules.
Pick out the wrong statement. Iodine value of an oil or fat is
independent of the type of oil, whether it is drying or non-drying.
Nickel is not used as a catalyst in the
Ostwald’s process of HNO3 manufacture.
iron is the purest form of iron.
Wrought
Enamels
give good glossy finish.
Varnish does not contain
pigment
Black liquor is converted into white liquor by
evaporation and burning the concentrate followed by causticisation of products.
Alcohol is produced by the
hydrolysis of an ether
Polymerisation product of C2F4 (carbon tetraflouride) is called P.T.F.E (poly chloro tetra flouro ethylene). It is also called
teflon
Solvent used for extraction of oil is
hexane
Insulin is an __________ drug.
none of these
Liquor poisoning generally occurs due to the presence of __________ in it.
methyl alcohol
Neoprene is chemically known as
polychloroprene
Pick out the wrong statement.
Chamber process of sulphuric acid manufacture produces pure acid of concentration < 80%.
Contact process of sulphuric acid manufacture produces pure acid of concentration ≥ 98%.
75% oleum can be produced by distillation of 20% oleum.
Contact process of sulphuric acid manufacture uses nickel as the catalyst.
Contact process of sulphuric acid manufacture uses nickel as the catalyst.
Pick out the wrong statement.
Catalytic hydrogenation of carbon monoxide produces methyl alcohol.
In nylon-6, the number 6 represents the total number of carbon atoms in the ring.
Raw materials for DDT manufacture are benzene and chlorine.
Ethanolamines are produced by using ammonia and ethylene oxide as raw material.
Raw materials for DDT manufacture are benzene and chlorine.
Molecular weights of polymers are in the range of
10^2 - 10^7
Sulphur removal by heating of pyrite ore in presence of air is called its
roasting
Deacon’s method is used for the manufacture of
chlorine
Pick out the true statement pertaining to water treatment.
Slow sand filters can remove colour completely.
Activated carbon can be used for taste & odour control without subsequent filtration.
Application of activated carbon reduces the temporary hardness of water.
Normally, the turbidity is removed by adding a coagulent prior to sedimentation.
Normally, the turbidity is removed by adding a coagulent prior to sedimentation.
Laboratory glass wares which reacts with hydroflouric acid, are made of the __________ glass.
borosilicate
Prussian blue is chemically represented by
Fe4 [Fe (CN6)3]
The most stable allotropic form of phosphorous is the __________ phosphorous.
black
Transportation of 35% oleum during winter suffers from the problem of freezing, which can be overcome by the addition of small quantity of
nitric acid
Function of thinner in a paint is to
suspend pigments & dissolve film forming materials.
Starting material for the production of styrene butadiene rubber (SBR) is
both (a) & (b) (
ethyl alcohol
ethylene)
Which one of the following is not an elastomer ?
Polyisoperene
Neoprene
Nitrile-butadiene
None of these
None of these
Which of the following processes can remove both temporary as well as permanent hardness of water ?
Distillation
Dacron is a
condensation product of hexam-ethylene diamine and adipic acid.
thermosetting material.
condensation product of dimethyl terephthalate and ethylene glycol.
none of these.
none of these.
Rancidity of the fatty oil can be reduced by its
hydrogenation
Platinum catalyst used in the earlier days of sulphuric acid manufacture by contact process suffers from the drawback like
high cost
fragile nature
easy poisoning tendency
all (a), (b) and (c)
all (a), (b) and (c)
_________ of rubber decreases after its vulcanisation.
Tackiness
Boiling of water containing temporary hardness produces
CO2
Starting material for the commercial production of ethyl alcohol in India is
molasses
Phenol formaldehyde
employs condensation polymerisation.
Which of the following is not an insecticide?
Hydrocyanic acid
Nicotine
Sodium flouride
Hexane
Hexane
Shrinkage volume in cement setting does not depend upon the
sand to cement ratio.
Bisphenol A is produced by the condensation of acetone with
phenol
In Kraft process of paper manufacture, white cooking liquor consists of caustic soda
sodium sulphide & sodium carbonate.
sodium sulphite & sodium carbonate.
sodium sulphite & sodium sulphide.
none of these.
sodium sulphide & sodium carbonate.
Presence of carbonaceous matter in the sewage
all (a), (b) and (c).
A mineral is termed as ‘ore’, if
a metal can be economically extracted from it.
In the manufacture of H2SO4, vanadium catalyst as compared to platinum catalyst
all (a), (b) and (c).
At a given temperature, the equilibrium yield of SO3 obtained from the oxidation of SO2 is proportional to (where, P = pressure of the system )
sqrt p
Oleum produces fumes of
SO3
20% oleum means that in 100 kg oleum, there are 20 kg of
SO3 and 80kg of H2SO4.
Chloramines are used in water treatment for
disinfection and control of taste & odour.
Glycerine is recovered from lye by
evaporation followed by vacuum distillation.
Inversion of sucrose produces
glucose
Enzymes are organic catalysts used in the __________ reactions.
biochemical
Linde process of gas liquefaction employs
adiabatic expansion through a throttle valve (Joule-Thomson expansion).
Cellulose content of bamboo and ideal fibrous raw material for the manufacture of paper is __________ percent.
50
Ore concentration by froth floatation utilises the __________ of ore particles.
wetting characteristics
The main use of activated carbon in water treatment is to control
taste and odour
The most commonly used substance to speed up the sedimentation of sewage is
lime
Sucrose is a
disacchride
Sugar content in sugarcane on cane basis is about __________ percent by weight.
5 to 10
Pick out the wrong statement.
Wine, rum & Vodka are prepared by the formulation of fruit juice, sugar beet & rye respectively.
Protein catalysts are called enzymes.
The rate of chemical reaction is independent of the concentration of reactants at high concentration of enzymes.
Total sugar content in molasses is about 10%.
Total sugar content in molasses is about 10%.
The major use of butadiene is
in the manufacture of synthetic rubber.
The manufacture of Kraft pulp is done by a/an __________ process.
alkaline
Antibiotic
inhibits/destroys the growth of microorganisms.
Which of the following paper does not require a filler during manufacture ?
Blotting paper
Industrial production of chloroform requires acetone and
calcium hypochlorite
Pencillin, an antibiotic drug was discovered by
Alexender
Styrene (a monomer for the production of polystyrene) is commercially produced by
catalytic dehydrogenation of ethyl benzene.
Hydrogenation of oil takes place in a/an __________ reactor.
trickle bed
Fatty material used in soap making is
tallow
__________ glass is used for the manufacture of optical glass.
Flint
Thermosetting plastic materials
can not be melted after forming.
Favourable conditions for the liquefaction of gases in general are
high pressure & low temperature.
In the manufacture of sulphuric acid from elemental sulphur, the following sequence of major operations is followed :
furnace → converter → absorber
__________ nature of hypo (sodium thiosulphate) makes it useful in photography.
Complex forming
__________ is an ore of lead.
Galena
Which of the following is an yellow pigment ?
Lead chromates
Catalytic oxidation of toluene produces
phenol
SO2 is bubbled through hot sugar cane juice to
act as an acidifying agent.
The noble gas which occurs most abundantly in the atmosphere is
argon
Production of alcohol by fermentation of molasses is an __________ process.
aerobic
Main constituents of portland cement are calcium aluminate and
silicates
Pick out the wrong statement.
High early strength cement are made from materials having high silica to lime ratio.
The function of gypsum in cement is to enhance its initial setting rate.
Acid resistant cements are known as silicate cement.
Major component of greyish portland cement is tricalcium silicate.
High early strength cement are made from materials having high silica to lime ratio.
Common salt is generally not produced commonly by __________ method from brine.
freeze drying
Sulphuric acid is mainly used in the __________ industry.
fertiliser
Pick out the wrong statement pertaining to nitric acid.
About 90% of nitric acid is manufactured by Ostwald’s process.
It is a strong mono basic acid which reacts with almost all the metals except noble metals.
Yellow color of impure nitric acid is because of dissolved oxides of nitrogen (mainly NO2).
Arc process of nitric acid manufacture is economical as compared to Ostwald’s process.
Arc process of nitric acid manufacture is economical as compared to Ostwald’s process.
Alcohol percentage in molasses may be around
40
Main use of hydrazine is
as a rocket fuel
Main use of liquid nitrogen is in
refrigerative cooling.
Comparing sulphate process with sulphite process, we find that __________ in the later.
both temperature & pressure in the former is more than that
Proximate analysis of coal determines its __________ content.
moisture & volatile matter
Pick out the exothermic reaction out of the following:
C + H2O = CO + H2
CaC2 + H2O = Ca(OH)2 + C2H2
MgCO3 = MgO + CO2
all (a), (b) and (c)
CaC2 + H2O = Ca(OH)2 + C2H2
__________ is produced using polycondensation reaction.
Phenol formaldehyde
Raw materials required for the manufacture of __________ is acetylene and hydrochloric acid.
vinyl chloride
In industrial nomenclature, alcohol means
ethanol
Which of the following is the purest form of water out of the following ?
Rain water
Use of water having dissolved oxygen in boilers promotes
corrosion
Unsaturated oils compared to saturated oils have
lower melting point & higher reactivity to oxygen.
With increase in temperature, the equilibrium constant at constant pressure (Kp) for oxidation of sulphur dioxide
decreases
Hollander beater used during paper pulp manufacture does not facilitate the __________ of fibre.
strengthening
Electrodeposition of metals i.e. electroplating is never done on
refractories
Chemical formula of oleum is
H2S2O7
The biochemical treatment applied to sewage effluents is a process of
oxidation
A cane sugar factory having sugar production rate of 10 tons/day will produce about __________ tons/day of bagasse (after consumption by the factory for heating etc.)
10
carbon, hydrogen, nitrogen & sulphur
carbon, hydrogen, nitrogen & sulphur
Sucrose content in cane sugar may be around __________ percent.
95
‘Hollander beater’ machine used in the paper manufacturing plant does not accomplish the task of
final rolling out of paper.
Yellow glycerine is made into white, using
activated carbon
Brackish water which contains mostly dissolved salt, can be purified by the __________ process.
reverse osmosis
Very dilute solutions are generally used in fermentation reactions for which the optimum temperature range is __________ °C.
30 to 50
Major component of flint glass is
lead oxide
Gypsum is chemically
calcium sulphate
Calcination of gypsum produces
plaster of paris
Phthalic anhydride is produced by the oxidation of
benzene
Superior quality laboratory apparatus is made of the __________ glass having low thermal co-efficient of expansion & high chemical resistance.
pyrex
Zeigler process
produces high density polyethylene.
Massecuite is
none of these.
Carbon content of pitch (residue of coal tar distillation) is around __________ percent.
94
Sodium salt of higher molecular weight fatty acid is termed as the __________ soap.
soft
Synthetic glycerine is produced from
propylene
A ‘unit process’ is exemplified by the
hydrogenation of oils
Commercial scale production of hydrogen from iron-steam reaction represented by, 3Fe + 3H2O = Fe3O4 + 4H2, is not practised, as it is
all
Viscosity index improver (like polystrene or polyisobutylene) is added to lubricant to
reduce the variation in its viscosity with temperature.
Pick out the wrong statement pertaining to solvent extraction of oil.Rate of extraction
decreases with decrease of thickness of the flakes.
increases with the increasing flake size keeping the flake thickness constant.
increases Considerably with the rise of temperature.
decreases as the moisture content of flakes increases.
temperature.
decreases as the moisture content of flakes increases.
Sea weeds are an important source of
iodine
Polythene is a/an __________ polymerisation product.
addition
Catalytic oxidation-dehydrogenation of methyl alcohol produces
formaldehyde
