section 10 Flashcards
A Unit operation is exemplified by the process of
a. reduction
b. desorption
c. nitration
d. combustion
b
The major constituents of glass are
a. lime, clay and soda ash
b. sand, lime and soda ash
c. silica, alumina and clay
d. silica, alumina and soda ash
b
Margarine is a/an
a. fat
b. explosive
c. plasticiser
d. rocket propellant
a
Oils and fats are converted to soap in a process
called
a. hydrogenation
b. esterification
c. saponification
d. none of these
c
Glycerine can be obtained from
a. fat
b. naphthalene
c. cumene
d. sucrose
a
Blue vitriol is chemically
a. copper sulphate
b. ferrous sulphate
c. copper nitrate
d. aluminium sulphate
a
Trinitro-toluene (TNT) is
a. used in glycerine manufacture.
b. an explosive.
c. used in dye manufacture.
d. none of these.
b
Thorium is mainly used
a. for the manufacture of gas mantles.
b. as a fissile fuel in a nuclear reactor.
c. in the manufacture of hydrogen bomb.
d. in the treatment of cancer.
a
During the absorption of HCl gas in water (to
produce liquid HCl), the gas is kept above dew
point to
a. increase the rate of absorption.
b. avoid corrosion.
c. reduce the cooling water circulation rate.
d. none of these.
b
Good quality of edible salt is obtained from
brine by the process of
a. solar evaporation
b. vacuum evaporation
c. freeze drying
d. electrolysis
b
Electric bulbs are made of __________ glass.
a. jena
b. flint
c. crookes
d. Pyrex
b
Which of the following is used as a binding
material in soap to improve soap texture?
a. Rosin
b. Borax
c. Benzyl acetate
d. Sodium carbonate
b
An alkali metal salt of palmitic acid is known as
a. soap
b. metallic soap
c. detergent
d. Alkaloid
b
Washing soda is chemically represented by
a. Na2CO3
b. Na2CO3.H2O
c. Na2CO3.10H2O
d. NaHCO3
c
Magnesium and calcium __________ cause
temporary hardness of water.
a. carbonates
b. bicarbonates
c. phosphates
d. sulphates
b
Which form of sulphur is the most stable at
room temperature?
a. Plastic
b. Monoclinic
c. Rhombic
d. Flowers of sulphur
c
Vegetable oils and fats basically differ in their
a. density ranges
b. physical state
c. chemical composition
d. chemical properties
b
Average sulphur content in Indian pyrites is
about __________ percent.
a. 15
b. 35
c. 55
d. 70
b
Oil is a/an
a. mixture of glycerides.
b. mixture of glycerides of fatty acids.
c. solid at normal temperature.
d. ester of alcohols other than glycerine.
b
Which of the following is a constituent of
coffee?
a. Caffeine
b. Nicotine
c. Calgon
d. Lignin
a
Which of the following is the main constituent
of the mother liquor produced in salt industry?
a. Quick lime
b. Glauber’s salt
c. Salt petre
d. Bromine
d
Silicon carbide is a/an
a. adhesive
b. abrasive
c. type of glass
d. brittle material
b
Oxygen is produced by fractionation of air using
__________ process.
a. Linde’s
b. Claude’s
c. either (a) or (b)
d. none of these
c
Trinitrotoluene (TNT), an explosive, is made by
the nitration of
a. nitrobenzene
b. toluene
c. nitrotoluene
d. Benzene
b
Which of the following is used as a coagulant in
treating turbid water?
a. Chlorine
b. Ferric sulphate
c. Calcium sulphate
d. Activated carbon
b
Carborundum consists mainly of
a. bauxite
b. silicon carbide
c. boron carbide
d. calcium carbide
b
Wax is a
a. mixture of glycerides.
b. mixture of esters of polyhydric alcohols
excepting glycerine.
c. liquid at room temperature.
d. mixture of glycerides of fatty acids.
b
Catalyst used in the hydrogenation of oil is
a. nickel
b. platinum
c. iron
d. Alumina
a
Viscose rayon is
a. cellulose nitrate.
b. regenerated cellulose nitrate.
c. regenerated cellulose acetate.
d. none of these.
d
Triple superphosphate is manufactured by
reacting
a. phosphate rock with phosphoric acid.
b. phosphate rock with sulphuric acid.
c. phosphate rock with nitric acid.
d. ammonium phosphate with phosphoric
acid.
a
Use of hydrated lime in water treatment
a. before filtration, reduces the bacterial load
on filters.
b. after filtration, combats the corrosive-ness
of water due to the presence of O2 & CO2.
c. is to adjust the pH value.
d. all (a), (b) and (c).
d
Higher vicosity index of a lubricating oil
denotes
a. less changes in fluidity of oil with
temperature.
b. substantially high change in fluidity of oil
with temperature.
c. its unsuitability under varying temperature
conditions .
d. none of these.
a
Le-Blanc process is a primitive process for the
manufacture of
a. caustic soda
b. soda ash
c. bromine from sea water
d. hydrochloric acid
b
How much temperature is maintained during
quicklime manufacture in the calcination zone of
the vertical shaft kiln?
a. 500°C
b. 750°C
c. 1000°C
d. 1500°C
c
Cement setting under water employs a/an
__________ process.
a. hydration
b. decomposition
c. oxidation
d. reduction
a
__________ are added in lacquers to remove
film brittleness and to improve adhereness.
a. Film forming materials
b. Plasticisers
c. Diluents
d. Solvents
b
Washing of coal is done to
a. remove the inherent impurities.
b. remove the adhering impurities.
c. reduce the ash content.
d. both(b) and (c).
d
Systemic insecticides
a. are absorbed throughout the plant.
b. kill insects following external bodily
contact.
c. are stomach poisons.
d. emit poisonous vapour.
a
dry ice (solidified CO2) is used for the
a. storage & shipment of frozen foods and ice-
creams.
b. liquefaction of permanent gases.
c. liquefaction of natural gas.
d. none of these.
a
In nylon-66, the first and second numbers (i.e.,
6) respectively designate the number of carbon
atoms present in the
a. diamine and the ring.
b. dibasic acid and the ring.
c. diamine and the dibasic acid.
d. none of these.
c
Chemical formula of BHC, which is an
insecticide is
a. C6H6Cl6
b. C6Cl6
c. C6H5Cl
d. C6H4Cl2
a
A bio-catalyst produced by living cells which
acts independent of the cell is called a/an
a. substrate
b. enzyme
c. nutrient
d. none of these
b
Pick out the wrong statement.
a. DDT is manufactured by the condensation
of chlorobenzene with chloral at 30°C in
presence of oleum, which is a highly
exothermic reaction.
b. Chloral is obtained by the chlorination of
ethyl alcohol.
c. Insecticides acting on the insects through
the respiratory system are called fumigants.
d. Benzene hexachloride is not a contact
insecticide.
d
The product obtained on mixing calcium oxide
with water is called
a. quicklime
b. slaked lime
c. milk of lime
d. none of these
b
The major constituent of black liquor generated
during paper manufacture is sodium
a. sulphate
b. carbonate
c. hydroxide
d. bi-carbonate
b
Plaster of Paris is
a. CaSO4.H2O
b. used for setting of broken bones
c. both (a) and (b)
d. same as gypsum
c
Exothermic neutralisation reaction between
caustic soda and dodecylbenzene sulphonic acid produces sodium dodecylbenzene sulphate, which is a/an
a. explosive
b. soap
c. detergent
d. analgesic drug
c
Conversion of SO2 to SO3 in Monsanto 4-pass
converter is about __________ percent.
a. 80
b. 90
c. 98
d. 100
c
Coke oven gas consists mainly of
a. H2, & CH4
b. CO, & CO2
c. H2, & CO
d. CH4, & CO
a
Chemical name of ‘alum’ is
a. barium sulphate.
b. aluminium sulphate.
c. aluminium chloride.
d. calcium sulphate.
b
