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Quiz 10
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Q.1
Alcohol is produced by the
Oxidation of an aldehyde
Hydrolysis of an ether
Esterification of a fat
None of these
Q.2
Yellow glycerine is made into white, using
Activated carbon
Diatomaceous earth
Bauxite
Bentonite
Q.3
Percentage of glycerene present in the spent lye obtained during soap manufacture is about
0.5
5
20
35
Q.4
Out of the following processes of paper pulp manufacture, the maximum corrosion problem in digestion & handling equipments is encountered in the __________ process.
Mechanical
Sulphate/kraft
Sulphite
Neutral sulphite semi-chemical
Q.5
Styrene butadiene rubber (SBR) is
A natural rubber
A synthetic polymer
A synthetic monomer
Another name of silicone rubber
Q.6
With increase in temperature, the equilibrium constant at constant pressure (Kp) for oxidation of sulphur dioxide
Increases
Increases linearly
Decreases
Decreases linearly
Q.7
Hydrazine is used in water treatment for the removal of
Colloidal impurities
Dissolved oxygen
Turbidity
Chlorinous taste
Q.8
Polyvinyl chloride (PVC) is
A thermosetting material
A condensation polymerisation product
Made by employing emulsion polymerisation
None of these
Q.9
'Synthesis gas' meant for the synthesis of organic compound is a variable mixture of
N₂ & H₂
CO₂ & H₂
CO & H₂
C & H₂
Q.10
Oil produced by solvent extraction
Has low free fatty acid content
Is odourless
Both A & B
Neither A nor B
Q.11
Conversion of SO₂ to SO₃ in Monsanto 4-pass converter is about __________ percent.
80
90
98
100
Q.12
Gun powder, which is an explosive comprises of charcoal, sulphur and
Glycerene
Salt petre
Nitro glycerene
Dynamite
Q.13
Starting material for the production of styrene butadiene rubber (SBR) is
Ethyl alcohol
Ethylene
Both A & B
Neither A nor B
Q.14
Very dilute solutions are generally used in fermentation reactions for which the optimum temperature range is __________ °C.
-5 to 0
5 to 10
30 to 50
75 to 80
Q.15
Chloramines are used in water treatment for
Disinfection and control of taste & odour
Corrosion control
Removing turbidity
Control of bacteria
Q.16
Pick out the endothermic reaction out of the following.
C+1/2O₂ = CO
CO + 3H₂ = CH₄ + H₂O
CaCO₃ = CaO + CO₂
CO +1/2O₂ = CO₂
Q.17
Double Contact Double Absorption (DCDA) process is the most recent process for the manufacture of
Nitric acid
Sulphuric acid
Ammonium sulphate
Hydrochloric acid
Q.18
Le-Blanc process is a primitive process for the manufacture of
Caustic soda
Soda ash
Bromine from sea water
Hydrochloric acid
Q.19
L.D. converter is used in the production of
Pig iron
Steel
Copper
Zinc
Q.20
90% of the caprolactum is converted to nylon-6 on its condensation polymerisation in the reactor maintained at __________ °C.
<0
10-30
250-280
500-600
Q.21
Setting of plaster of paris is accompanied with
Hydration
Dehydration
Hydrolysis
Loss of CO₂
Q.22
Phthalic anhydride is used
In making PVC
As plasticisers
In insecticides manufacture
For making nylon-6
Q.23
Pick out the wrong statement.
Azoic dyes are mostly applied on cotton fabrics
Basic dyes (e.g. amino derivatives) are applied mostly to paper
Mordant dyes are applied mainly to wools
None of these
Q.24
Argon is the third largest constituent of air (followed by N₂ & O₂). Its percentage by volume in air is
0.14
0.34
0.94
1.4
Q.25
Pick out the true statement pertaining to water treatment.
Slow sand filters can remove colour completely
Activated carbon can be used for taste & odour control without subsequent filtration
Application of activated carbon reduces the temporary hardness of water
Normally, the turbidity is removed by adding a coagulent prior to sedimentation
Q.26
A 'unit process' is exemplified by the
Distillation
Hydrogenation of oils
Absorption
Humidification
Q.27
Cement setting under water employs a/an __________ process.
Hydration
Decomposition
Oxidation
Reduction
Q.28
Pick out the false statement pertaining to water treatment.
Aeration of water is effective in CO₂ removal
The zeolite water softening process reduces the hardness of water by not more than 50%
Sodium sulphate or sodium carbonate do not cause hardness in water
Water with pH value less than 7, is acidic
Q.29
Phenol formaldehyde
Employs addition polymerisation
Employs condensation polymerisation
Is a monomer
Is an abrasive material
Q.30
Ordinary glass is not a/an
Amorphous isotropic material
Supercooled liquid
Material with sharp definite melting point
Electrical insulator
Q.31
Which one of the following is not likely to be a constituent of vegetable oils?
Citric acid
Oleic acid
Stearic acid
Glycerol
Q.32
Main constituents of cotton fiber is
Lignin
Cellulose
Starch
Gelatine
Q.33
Extraction of __________ employs an electrolytic process.
Aluminium
Silver
Copper
All of the above
Q.34
Phenol is mainly used
To produce benzene
To produce phenol formaldehyde
To produce polyester resin
As a plasticiser for unsaturated polyster
Q.35
Absorption of SO₃ in 97% H₂SO₄ is
Exothermic
Endothermic
Not possible
None of these
Q.36
The most reactive allotropic form of phosphorus is __________ phosphorus.
Red
Yellow
Violet
Black
Q.37
Major component of flint glass is
Lead oxide
Silica
Alumina
Soda
Q.38
Which of the following is the main constituent of the mother liquor produced in salt industry?
Quick lime
Glauber's salt
Salt petre
Bromine
Q.39
__________ iron is the purest form of iron.
Cast
Wrought
Pig
High silicon
Q.40
Liquefaction of gases can not be done by
Exchange of heat with colder stream
Adiabatic expansion through a throttle valve (Joule-Thomson expansion)
Merely compressing it beyond critical pressure
Adiabatic expansion against a piston or in a turbine
Q.41
Dry ice (solidified CO₂) is used for the
Storage & shipment of frozen foods and ice-creams
Liquefaction of permanent gases
Liquefaction of natural gas
None of these
Q.42
Sea water contains about __________ ppm of bromine.
5
70
500
1700
Q.43
Oxygen is separated by distillation from air after its liquefaction. The boiling point of oxygen is about __________ °C.
-83
-183
-196
-218
Q.44
Phosphoric acid is prepared from
Cryolite
Chalcopyrite
Rock phosphate
None of these
Q.45
Hydrogen gas is not produced commercially (for nitrogeneous fertiliser manufacture) by
Iron-steam reaction
Electrolysis of water
Steam reforming of naphtha
Its cryogenic separation from coke oven gas
Q.46
Process conditions in fermentator used for production of penicillin is
25°C, 2 atm
50°C, l0 atm
30°C, 200 mm Hg (absolute)
90°C, 45 atm
Q.47
Function of thinner in a paint is to
Accelerate the oxidation of oil
Prevent gelling of the paint
Suspend pigments & dissolve film forming materials
Form a protective film
Q.48
__________ process is used for the manufacture of sodium carbonate by ammonia soda process.
Ostwald's
Bosch
Solvay
Haber's
Q.49
Which one of the following is not an elastomer?
Polyisoperene
Neoprene
Nitrile-butadiene
None of these
Q.50
Unsaturated oils compared to saturated oils have
Lower melting point & higher reactivity to oxygen
Higher melting point & higher reactivity to oxygen
Lower melting point & lower reactivity to oxygen
Higher melting point & lower reactivity to oxygen
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