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Quiz 6
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Q.1
Viscosity index improver (like polystrene or polyisobutylene) is added to lubricant to
Reduce its viscosity
Increase its viscosity
Reduce the variation in its viscosity with temperature
Increase the variation in its viscosity with temperature
Q.2
P.T.F.E. (Poly tetra fluoro ethylene) is commercially known as
Bakelite
Neoprene
Teflon
Nylon-66
Q.3
Cumene is the starting material for the production of
Benzoic acid
Phenol and acetone
Isoprene
Styrene
Q.4
Molasses is the starting material for the production of
Alcohol
Essential oil
Fatty acids
Massecuite
Q.5
Flexible foam (for mattresses) is usually made of
PVC
Silicone
Polyurethanes
Polyamides
Q.6
Kopper-Totzek coal gasifier
Can give ammonia synthesis gas (H₂ + N₂)
Is a moving bed reactor
Cannot use coking coal
Operate at very high pressure
Q.7
Concentration of NaOH solution produced by mercury electrolytic cell is about __________ percent.
10
25
50
98
Q.8
Tall oil obtained as a by-product from the black liquor recovery is
A black, sticky & viscous liquid
Used in the manufacture of greases, emulsions & soaps
Composed mainly of rosin & fatty acids
All of the above
Q.9
Main use of hydrazine is
As a rocket fuel
In water treatment
As a disinfectant
As fire retardant
Q.10
In the manufacture of sulphuric acid from elemental sulphur, the following sequence of major operations is followed :
Furnace → converter → absorber
Furnace → evaporator → absorber
Furnace → converter → evaporator
Converter → furnace → absorber
Q.11
Chlorine gas is produced by the electrolysis of brine (NaCl solution with solid NaCl make up) in mercury electrolytic cell. Which of the following is the anodic reaction?
Oxidation of Na+ ions
Oxidation of Cl- ions
Reduction of Na+ ions
Reduction of Cl- ions
Q.12
Which of the following sugars is the sweetest?
Glucose
Fructose
Sucrose
Lactose
Q.13
Which of the following is not an antibiotic?
Penicillin
Streptomycin
Tetracyclin
Quinine
Q.14
Which of the following is not an insecticide?
Hydrocyanic acid
Nicotine
Sodium flouride
Hexane
Q.15
Nylon 66 is so named because the
Average degree of polymerisation of the polymer is 1966
Number of carbon atoms between two nitrogen atoms are 6
Number of nitrogen atoms between two carbon atoms are 6
Polymer was first synthesised in 1966
Q.16
Lindane is
Not a fumigant
BHC (Benzene Hexa Chloride) containing 99% γ-isomer
A by-product of BHC manufacture
Both B and C
Q.17
Litharge is
Lead oxide
Zinc oxide
Zinc sulphide
Cellulosic photographic material
Q.18
The amount of benzene present in pure benzol is about __________ percent.
30
50
70
90
Q.19
Concentration of NaOH solution produced by diaphragm electrolytic cell is about __________ percent.
10
25
50
98
Q.20
Which of the following is an unsaturated fatty acid?
Lauric acid
Palmitic acid
Stearic acid
Oleic acid
Q.21
Zeolite used in water softening process (cation exchange) is regenerated by washing with
Brine
Chloramines
Sodium bisulphite
Liquid chlorines
Q.22
An oil is converted into fat by its
Hydrogenation
Hydrolysis
Hydrocracking
Hydration
Q.23
Reaction of ethylene glycol and dimethyl terephthalate (DMT) produces
Nylon-6
Dacron
Polyester
PVC
Q.24
Which of the following is not a raw material used for the manufacture of ordinary glass?
Iron oxide
Soda ash
Limestone
Silica
Q.25
__________ is the major constituent of the Portland cement.
Calcium carbonate
Calcium oxide
Tricalcium silicate
Calcium sulphate
Q.26
The product obtained on mixing calcium oxide with water is called
Quicklime
Slaked lime
Milk of lime
None of these
Q.27
Concentration of sulphide ores is done usually by
Roasting
Smelting
Froth floatation
Electro magnetic separation
Q.28
The yield of tar from high temperature carbonisation of dry coal is about __________ percent.
3
12
22
0.3
Q.29
White phosphorous is stored under water, because
It does not react with water
It is poisonous
Its kindling temperature in dry air is very low
It is unstable
Q.30
The most stable allotropic form of phosphorous is the __________ phosphorous.
White
Black
Yellow
Red
Q.31
Portland cement consists mainly of
CaO & SiO₂
SiO₂ & Al2O₃
CaO & Al2O₃
CaO & FE₂O₃
Q.32
Pick out the wrong statement pertaining to the properties of glasses. Glasses generally have
High electrical insulation properties
Sharp melting points
Low co-efficient of thermal expansion
Compressive strength much greater than their tensile strengths
Q.33
Deacon's method is used for the manufacture of
Glauber's salt
Common salt
Chlorine
Graphite electrode
Q.34
Catalytic oxidation-dehydrogenation of methyl alcohol produces
Formaldehyde
Phenol
Acetone
Maleic anhydride
Q.35
The combustion reaction, C + O₂ = CO₂, is
Exothermic
Endothermic
Autocatalytic
None of these
Q.36
Kaoline is a/an
Refractory material
Synthetic resin
Artificial abrasive
Blue pigment
Q.37
Coke oven gas consists mainly of
H₂, & CH₄
CO, & CO₂
H₂, & CO
CH₄, & CO
Q.38
Coagulant is used __________ filtration.
Before
After
During
To avoid
Q.39
The compressive strength of cement should not be less than about 110Kg/cm² after three days & not less than 170Kg/cm² after seven days. The fineness of an ordinary cement as determined by turbidimetric method should be about __________ cm²/gm.
800
1600
4000
8500
Q.40
Solvay process is used for the manufacture of
Caustic soda
Soda ash
Caustic potash
Soda lime
Q.41
The terminology 'BTX' used in coal tar distillation industry refers to
Benzol-toluol-xylol
Benzol-toluene-xylene
Benzene-toluol-xylol
Benzene-toluene-xylene
Q.42
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
Q.43
Sodium chloride content in sea water is about __________ gms/litre.
2
10
25
50
Q.44
Pick out the wrong statement pertaining to the soap manufacture.
Transparent soaps are made by cold process
Organic pigments are used as colouring materials in the soap manufacture
Both laundary as well as toilet soaps are manufactured by hot process
Colourless rosin is used in the manufacture of laundary soaps
Q.45
Carbon disulphide is mainly used in the production of
Viscose rayon
Corundum
Plasticiser for unsaturated polyester
Paints
Q.46
Cooking liquor in case of sulphite process is
Sodium sulphite and sodium bisulphite
Magnesium sulphite and free SO₂ in acid medium
Magnesium sulphate and magnessium bicarbonate
None of these
Q.47
The main component of pyrex glass is
Zinc
Lead
Boron
Celenium
Q.48
In the Lurgi coal gasifier
Coking coals cannot be used
Low carbon conversion efficiency is achieved
Entrainment of solids is higher
Large quantity of coal can be processed
Q.49
Use of chlorine in the treatment of sewage
Helps in grease separation
Increases the biological oxygen demand(BOD)
Causes bulking of activated sludge
Aids in flocculation
Q.50
Commonly used glass is known as the __________ glass.
Flint
Hard
Pyrex
Soda
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