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Quiz 12
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Q.1
Widely used method for the conditioning of boiler feed water is the
Cold lime process
Coagulation
Hot-lime soda process
Sequestration
Q.2
Neon gas is
Flammable in nature
Used in color discharge tube
Filled in lamps having tungsten filament
All of the above
Q.3
Naphthols are derivates of
Methyl amine
Naphthalene
Phenol
Xylene
Q.4
Which of the following has sodium bicarbonate as its main constituent ?
Baking soda
Baking powder
Washing soda
None of these
Q.5
In an integrated steel plant, NH₃ present in coke oven gas is normally recovered as
(NH₄)2SO₄
NH₄Cl
(NH₄)2 NO₃
Liquid NH₃
Q.6
Pick out the wrong statement.
Pasteurisation of milk involves moderate heating followed by cooling
Bakeries and breweries make use of yeasts
Enzyme is a complex nitrogenous compound
Oils and fats are alkaloids
Q.7
Fermentation is adversely affected by the
Presence of air
Absence of air
High concentration
Presence of ammonium salts
Q.8
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
Q.9
Which of the following is not produced on commercial scale from sea water?
Bromine
Magnesium compounds
Potassium compounds
Sodium sulphate
Q.10
Metallic soap (e.g. aluminium or calcium salts of fatty acids) can be used
As a lubricant
As a rust preventive
In hard water for cleaning of cloth
As a foam depressant in distillation column
Q.11
Shrinkage volume in cement setting does not depend upon the
Sand to cement ratio
Water to cement ratio
Ambient temperature fluctuation
Drying period
Q.12
Pick out the wrong statement.
Fibrillation of fibre during paper manufacture is done to develop the strength in paper
Alkali consumption in digestion/cooking of bamboo is measured in terms of permangnate number
Bagasse fibre contains both lignin & cellulose
Presence of sodium sulphate in pulp makes the pulp bleachability poor
Q.13
Nicotine is
A volatile alkaloid
Obtained by treating by-products of the tobacco processing industry
Both A and B
Neither A nor B
Q.14
Dehydrogenation of ethyl benzene produces
Styrene
Naphthalene
Phenol
Benzoic acid
Q.15
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
Q.16
Pick out the wrong statement.
Cold rubber (SBR) is superior as compared to hot rubber (SBR)
Polymerisation temperature can modify the properties of SBR
Production of cold SBR employs lower pressure as compared to that of hot SBR
None of these
Q.17
__________ of quicklime produces slaked lime.
Hydration
Dehydration
Hydrogenation
None of these
Q.18
Na₂CO₃ is called
Washing soda
Soda ash
Plaster of paris
Calcite
Q.19
Dehydrogenation of isopropanol produces
Propyl alcohol
Acetone
Trichloroethylene
Formaldehyde
Q.20
Which of the following is the second major component of cement?
Al₂O₃
SiO₂
CaO
Fe₂O₃
Q.21
Styrene is produced from ethyl benzene by the process of
Dehydrogenation
Oxidation
Alkylation
Dehydration
Q.22
Styrene is produced from ethyl benzene by the process of
Dehydrogenation
Oxidation
Alkylation
Dehydration
Q.23
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
Remove the coloring matter from the syrup
Reduce the viscosity of the syrup
Improve the rate of crystallisation of sugar
Q.24
The most commonly used substance to speed up the sedimentation of sewage is
Lime
Sulphuric acid
Chlorine
Sodium bisulphite
Q.25
Nitrogen is an essential component of
Mineral salts
Carbohydrates
Fats
Proteins
Q.26
Reverse osmosis is normally used for the
Separation of isotopes of uranium from gaseous uranium hexaflouride
Separation of helium from natural gas
Desalination of brackish water to produce potable (drinking) water
Purification of oxygen
Q.27
Maleic anhydride is produced by catalytic oxidation of
Toluene
Ethyl alcohol
Naphthalene
Benzene
Q.28
Which of the following is not a product of coal tar distillation?
Anthracene
Cresote oil
Carbolic oil
None of these
Q.29
Catalyst used in the oxidation of benzene to produce maleic anhydride is
V₂O₅
Pt
Ni
Cr
Q.30
The enzyme which converts starch into the disacharides maltose is
Diastase
Maltase
Yeast
None of these
Q.31
Trinitro-toluene (TNT) is
Used in glycerine manufacture
An explosive
Used in dye manufacture
None of these
Q.32
Oils are partially hydrogenated (not fully) to manufacture vanaspati, because fully saturated solidified oils
Cause cholesterol build up and blood clotting
Are prone to rancid oxidation
Always contain some amount of nickel (as their complete removal is very difficult)
Have affinity to retain harmful sulphur compounds
Q.33
Which of the following fuel gases contains maximum amount of carbon monoxide?
Coke oven gas
Water gas
Blast furnace gas
L.D. converter gas
Q.34
Poly tetraflouro ethylene (P.T.F.E.) is known as
Bakelite
Teflon
Celluloid
Decron
Q.35
Zeolite is a/an
Naturally occuring clay which is capable of exchanging cations
Abrasive material
Catalyst used in shift conversion
None of these
Q.36
Thermoplastic materials
Do not soften on application of heat
Are heavily branched molecules
Are solvent insoluble
None of these
Q.37
Thermosetting materials
Are cross-linked molecules
Soften on application of heat
Are solvent soluble
None of these
Q.38
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.).
1
10
25
40
Q.39
Which of the following is a detergent?
Benzene hexachloride
Alkyl benzene sulphonate
Polytetraflouroethylene
Cellulose nitrate
Q.40
Drinking (potable) water treatment does not involve
Coagulation
Sedimentation
Softening
Disinfection
Q.41
Esterification reaction produces
Detergent
Vanaspati
Soap
Mercaptans
Q.42
Alcohol percentage in molasses may be around
10
40
70
85
Q.43
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
All of the above
Q.44
Mercury electrolytic cells are preferred over diaphragm electrolytic cell (for production of caustic soda), as it
Has larger production capacity per unit cell
Consumes less power per ton of Cl₂ produced
Produces high purity (70%) caustic soda directly
All of the above
Q.45
Potassium is kept & transported under
Water
Liquid ammonia
Kerosene oil
Alcohol
Q.46
Synthetic glycerine is produced from
Toluene
Phenol
Propylene
Naphthalene
Q.47
Thorium is mainly used
For the manufacture of gas mantles
As a fissile fuel in a nuclear reactor
In the manufacture of hydrogen bomb
In the treatment of cancer
Q.48
Alum [Al2(SO₄)₃] is used as a coagulant in water treatment to remove
Colour
Turbidity
Bacteria
All of the above
Q.49
Synthesis gas is a mixture of
CO and H₂
N₂ and H₂
H₂, CH₄ and CO
CO₂ and H₂
Q.50
Systemic insecticides
Are absorbed throughout the plant
Kill insects following external bodily contact
Are stomach poisons
Emit poisonous vapour
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