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Quiz 7
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Q.1
Hollander beater used during paper pulp manufacture does not facilitate the __________ of fibre.
Cutting
Fibrillation
Hydration
Strengthening
Q.2
Sulphuric acid completely saturated with sulphur trioxide is called
Concentrated sulphuric acid
Oleum
Sulphurous acid
Dilute sulphuric acid
Q.3
Basic oxide is absent in __________ glass.
Flint
Pyrex
Quartz
All of the above
Q.4
Insulin is an __________ drug.
Anti-malarial
Anti-TB
Antibiotic
None of these
Q.5
Inversion of sucrose produces
Fructose
Glucose
Both A & B
Neither A nor B
Q.6
Main constituent of limestone is
CaCO₃
MgCO₃
Na₂CO₃
CaSO₄
Q.7
Ethylene oxide is produced by oxidation of ethylene in presence of AgO catalyst at
1 atm & 100°C
5 atm & 275°C
100 atm & 500°C
50 atm & 1000°C
Q.8
Bleaching of paper pulp is done with
Activated clay
Bromine
Chlorine or chlorine dioxide
Magnesium sulphite
Q.9
__________ is produced using polycondensation reaction.
Polythene
Phenol formaldehyde
Poly vinyl chloride
None of these
Q.10
Acrylonitrile is mainly used in the __________ industry.
Polymer
Printing
Dyeing
Photographic
Q.11
Most commonly used rubber vulcanising agent is
Sulphur
Bromine
Platinum
Alumina
Q.12
Enzymes are
Proteins with high molecular weight (around 10, 000)
Derived from living organisms
Catalyst for temperature sensitive reactions
All of the above
Q.13
Neoprene is chemically known as
Polybutadiene
Styrene butadiene rubber (SBR)
Polyurathane
Polychloroprene
Q.14
__________ of rubber decreases after its vulcanisation.
Resistance to the action of organic solvent
Tackiness
Maximum service temperature
Tensile strength
Q.15
The main aim behind cooling the digested chip at the bottom portion of the digestor by injecting cold black liquor is to
Avoid mechanical weakening of fibre
Remove lignin by way of crystallisation
Increase the cellulose content
None of these
Q.16
Isopropyl benzene produced by alkylation of benzene with propylene is known as
Neoprene
Cumene
Gelatin
Mercaptans
Q.17
Coloured glass is obtained by mixing of colored salts. Addition of __________ oxide is done to impart greenish blue color to the glass.
Chromium
Arsenic
Copper
Mangnese
Q.18
Direct conversion of chemical energy into electrical energy is done in a
Magnetohydrodynamic (MHD) generator
Fuel cell
Fast breeder reactor
None of these
Q.19
Alcohol content in freshly prepared natural and fortified wine may be respectively around __________ percent.
7-14 and 14-30
7-14 and 40-50
14 - 30 and 40-50
10 - 20 and 40 - 50
Q.20
The function of gypsum addition during cement making is to
Increase the density of cement
Decrease the cement setting rate
Both A and B
Neither A nor B
Q.21
Catalyst used in the hydrogenation of oil is
Nickel
Platinum
Iron
Alumina
Q.22
Flux addition during smelting of ore is done to
Remove impurities/gangue
Enhance rate of reaction
Accelerate reduction of ore
Separate slag from metal
Q.23
Blue colour is imparted to glass by the addition of
FeSO₄
PbO
CaO
NaOH
Q.24
Oils and fats are converted to soap in a process called
Hydrogenation
Esterification
Saponification
None of these
Q.25
Epoxy resin
Is a good adhesive
Is an elastomer
Cannot be used for surface coatings
Is a polyester
Q.26
Anion exchanger is regenerated usually with
NaOH
H₂SO₄
Hydrazine
Alum solution
Q.27
Rosin soap is added during paper manufacture to
Impart adhesive properties
Improve opacity
Impart resistance to penetration by liquids
None of these
Q.28
Sulphuric acid is mainly used in the __________ industry.
Fertiliser
Steel
Paper
Paint
Q.29
A bio-catalyst produced by living cells which acts independent of the cell is called a/an
Substrate
Enzyme
Nutrient
None of these
Q.30
Pick out the wrong statement pertaining to nitric acid.
About 90% of nitric acid is manufactured by Ostwald
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
Q.31
Exothermic neutralisation reaction between caustic soda and dodecylbenzene sulphonic acid produces sodium dodecylbenzene sulphate, which is a/an
Explosive
Soap
Detergent
Analgesic drug
Q.32
Resistance to fusion of the refractory under a steady rising temperature condition is called
Spalling
Refractoriness
Both A & B
Neither A nor B
Q.33
Enamels
Give good glossy finish
Are same as varnish
Are prepared from non-drying oil
Do not contain pigment
Q.34
Sea weeds are an important source of
Fluorine
Chlorine
Bromine
Iodine
Q.35
Cation exchanger is regenerated usually with
NaOH
H₂SO₄
Hydrazine
Alum solution
Q.36
In the Solvay process, the product from the calciner is
Light soda ash
Dense soda ash
Sodium bicarbonate
Dehydrated soda ash
Q.37
Magnesium and calcium __________ cause temporary hardness of water.
Carbonates
Bicarbonates
Phosphates
Sulphates
Q.38
Which of the following is a disacchride?
Sucrose
Glucose
Starch
Maltose
Q.39
Sucrose content in the raw juice extracted from sugar cane is about __________ percent.
1 - 2
15 - 20
50 - 60
80 - 85
Q.40
Massacuits is a terminology used in the __________ industry.
Paint
Oil hydrogenation
Soap
Sugar
Q.41
Helium is produced on commercial scale from
Air
Natural gas
Coke oven gas
None of these
Q.42
__________ is used as a flux in the extraction of iron from iron ore (hametite) in blast furnace.
Bauxite
Limestone
Quartz
Manganese
Q.43
The most widely used coagulant for removing suspended impurities from water is
Bleaching powder
Chlorine
Calcium sulphate
Alum
Q.44
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
Q.45
Enzymes are organic catalysts used in the __________ reactions.
Chemical
Biochemical
Photochemical
Electrochemical
Q.46
Styrene (a monomer for the production of polystyrene) is commercially produced by
Catalytic dehydrogenation of ethyl benzene
Dehydration of ethyl alcohol followed by hydrogenation
Reacting ethylene oxide with acetal-dehyde
Fermentation of starch
Q.47
Mercury cells for caustic soda manufacture, compared to diaphragm cells
Require lower initial investment
Require more power
Produce lower concentration NaOH
None of these
Q.48
Salt cake is chemically represented by
Na₂SO₄
CaSO₄.1/2 H₂O
MgSO₄
BaSO₄
Q.49
Prussian blue is chemically represented by
FeO.TiO₂
Ca SO₄ . 2H₂O
Fe₄ [Fe (CN₆)₃]
AlF₃ . 3N
a
F
Q.50
Ore concentration by froth floatation utilises the __________ of ore particles.
Density difference
Wetting characteristics
Terminal velocities
None of these
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