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Quiz 11
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Q.1
Superior quality laboratory apparatus is made of the __________ glass having low thermal co-efficient of expansion & high chemical resistance.
Flint
Soda
Pyrex
Potash
Q.2
Purity of oxygen used for blowing in steel making L.D. converter is 99.5%. The boiling point of oxygen is about __________ °C.
-53
-103
-183
-196
Q.3
Parathion and Malathion are
Pesticides
Plasticisers for unsaturated polysters
Pain-relieving drugs (analgesic)
Tranquilisers
Q.4
Pasteurisation of milk means
Removal of fatty and albuminous substance from it
Killing of organisms present in it by heating it at controlled temperature without changing its natural characteristics
Inhibiting the growth of micro-organisms without killing them
None of these
Q.5
Hydrochloric acid is also known as
Oil of vitriol
Muriatic acid
Strong organic acid
Green acid
Q.6
Which of the following is a co-product during the manufacture of caustic soda by electrolysis of brine?
Na₂CO₃
NaHCO₃
H₂
None of these
Q.7
Nylon-6 is manufactured from
Caprolactum
Hexamethylene diamine and adipic acid
Hexamethylene diamine and maleic anhydride
Hexamethylene diamine and sebacic acid
Q.8
Oil is a/an
Mixture of glycerides
Mixture of glycerides of fatty acids
Solid at normal temperature
Ester of alcohols other than glycerine
Q.9
In premitive days, __________ was being manufactured by Leblanc Process.
Alum
Washing soda
Soda ash
Calcium carbide
Q.10
Removal of dirt/soil by soaps or detergent does not involve the __________ of soil.
Emulsification
Dispersion
Precipitation
Wetting
Q.11
__________ acid is the main constituent of cotton seed oil.
Acetic
Linoleic
Palmitic
Oleic
Q.12
DDT should not be allowed to come in contact with iron (during its manufacture) to
Avoid its decomposition
Prevent sulphonation of the monochlorobenzene by the acid catalyst
Achieve non-hygroscopic property
None of these
Q.13
Which of the following is not present in bagasse fibre?
Cellulose
Lignin
Pentogens
None of these
Q.14
Sodium carbonate (soda ash) is not used in the manufacture of
Fire extinguishers
Sugar
Baking powder
Detergents
Q.15
'Hollander beater' machine used in the paper manufacturing plant does not accomplish the task of
Final rolling out of paper
Cutting of fibres
Hydration of fibres
Fibrillation of fibre
Q.16
Coke used for the production of calcium carbide should have
Low ash content
Low ignition temperature
High electrical resistivity
All of the above
Q.17
In nylon-66, the first and second numbers (i.e., 6) respectively designate the number of carbon atoms present in the
Diamine and the ring
Dibasic acid and the ring
Diamine and the dibasic acid
None of these
Q.18
The purpose of tanning in leather industry is to
Stiffen the leather
Smoothen the leather
Make it flexible
Impart water resistance
Q.19
What products do we get on electrolysis of saturated brine using steel cathode and graphite anode in an electrolytic cell?
Cl₂ & Na
Cl₂ & H₂
O₂ & H₂
Cl₂, H₂ & NaOH solution
Q.20
Saponification value/number of an oil or fat is a measure of its
Fatty acid content
Degree of unsaturation of the fatty acids present in it
Average molecular weight
Insoluble fatty acid content
Q.21
High acid value of an oil or fat is an indication of
Storage under improper conditions
Absence of unsaturation
Its smaller molecular weight
None of these
Q.22
Oleum produces fumes of
SO₂
H₂SO₄
SO₃
SO₂ + H₂SO₄
Q.23
Nylon 6-6 is manufactured from
Hexamethylene diamine and adipic acid
Hexamethylene diamine and maleic anhydride
Caprolactum
Dimethyl terephthalate and ethylene glycol
Q.24
CO & H₂ are the constituents of
Producer gas
Water gas
Coke oven gas
All of the above
Q.25
Neoprene is a
Monomer
Synthetic rubber
Polyester
None of these
Q.26
Neoprene is the trade name of
Polyurathane
Phenol formaldehyde
Polychloroprene
Styrene-butadiene rubber
Q.27
The manufacture of Kraft pulp is done by a/an __________ process.
Alkaline
Acidic
Neutral
None of these
Q.28
Commercially ethylene is produced from naphtha by
Catalytic cracking
Catalytic dehydrogenation
Pyrolysis
Hydrocracking
Q.29
Nitric acid is not used in the manufacture of
Detergents
Fertilisers
Aqua regia
Explosives
Q.30
The basic constituent of vegetable oils is
Triglyceride
Fatty acids
Fatty alcohol
Mono esters
Q.31
Pick out the wrong statement.
DDT is manufactured by the condensation of chlorobenzene with chloral at 30°C in presence of oleum, which is a highly exothermic reaction
Chloral is obtained by the chlorination of ethyl alcohol
Insecticides acting on the insects through the respiratory system are called fumigants
Benzene hexachloride is not a contact insecticide
Q.32
Nylon-6 is a
Polyamide
Thermosetting resin
Polyester
None of these
Q.33
Polymerisation product of C₂F4 (carbon tetraflouride) is called P.T.F.E (poly chloro tetra flouro ethylene). It is also called
Polyurethane
Silicone
Teflon
Epoxy resin
Q.34
The major constituent of black liquor generated during paper manufacture is sodium
Sulphate
Carbonate
Hydroxide
Bi-carbonate
Q.35
Starting material for the commercial production of ethyl alcohol in India is
Rice
Molasses
Fruit of Mahua tree
Maize
Q.36
Oxidation of SO₂ to SO₃ is favoured by
Low temperature and low pressure
Low temperature and high pressure
High temperature and low pressure
High temperature and high pressure
Q.37
H₂S is scrubbed from refinery gases by absorption using
Dilute H₂SO₄
Ethanol amine
Chilled water
Tri-butyl phosphate
Q.38
Ceramics are produced from silicates or clayish materials: Which of the following is not a ceramic material?
Slag cement
Glasses
Porcelain/Potteries
Teflon
Q.39
How much temperature is maintained during quicklime manufacture in the calcination zone of the vertical shaft kiln?
500°C
750°C
1000°C
1500°C
Q.40
Pick out the wrong statement.
Low intensity explosives are also called propellants, whereas high intensity explosive are called detonators
Gun powder comprises of 75% salt petre, 15% charcoal and 10% sulphur
Lead azide is a popular military explosive
TNT is a hygroscopic explosive having very high melting point and is non-toxic to human being
Q.41
Cellulose percentage in bamboo fibre is about
10
20
50
85
Q.42
During the manufacture of sulphuric acid, the temperature of molten sulphur is not increased beyond 160°C, as
It is very corrosive at elevated temperature
Its viscosity is not reduced on further heating (hence pressure drop on pumping it, cannot be further reduced)
It decomposes on further increasing the temperature
None of these
Q.43
Na₂CO₃.10H₂O is called
Washing soda
Soda ash
Slaked lime
Quicklime
Q.44
The only commercial Fischer-Tropsch plant for producing liquid hydrocarbon fuel from coal is located at
SASOL (in South Africa)
Redcar (U.K.)
Los-Angles (U.S.A.)
Trombay (India)
Q.45
Main constituents of portland cement are calcium aluminate and
Gypsum
Silicates
Sodium silicate
Carbonates
Q.46
A mineral is termed as 'ore', if
A metal can be economically extracted from it
It contains ≥ 40% metal
The metal present in it is costly
All of the above
Q.47
Boiling of water containing temporary hardness produces
CO₂
CaSO₄
CaHCO₃
None of these
Q.48
Which of the following additives/water proofing agents is added to lower the hydrophilic (moisture loving) characteristic of cement?
Xanthates
Stearic acid
Calcium & aluminium stearate
Formic acid
Q.49
Main use of liquid nitrogen is in
Rocket propulsion
Making gun powder
Detergent manufacture
Refrigerative cooling
Q.50
Pick out the wrong statement.
Dry process is used for the manufacture of cement, when the raw material is blast furnace slag
Portland cement is made employing wet process
Gypsum is added to portland cement to lengthen its setting time
None of these
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