__________ of rubber decreases after its vulcanisation.
Resistance to the action of organic solvent
Tackiness
Maximum service temperature
Tensile strength
Correct Answer :
B. Tackiness
Related Questions
Salt cake is chemically represented by
Na2SO4
CaSO4. ½H2O
MgSO4
BaSO4
__________ is not a constituent of gun powder.
Carbon
Charcoal
Sulphur
Potassium nitrate
BHC (Benzene hexachloride) is made by the chlorination of benzene
Which is an addition reaction
Which is a substitution reaction
In absolute dark
In presence of sunlight
Polycaprolactam is commercially known as
Nylon-6
Nylon-66
Dacron
Rayon
Catalytic oxidation of toluene produces
Styrene
Phenol
Benzene
Tri-nitro-toluene
Fat dispersed in water is exemplified by
Colloids
Gel
Butter
Emulsion
Major component of flint glass is
Lead oxide
Silica
Alumina
Soda
The basic constituent of vegetable oils is
Triglyceride
Fatty acids
Fatty alcohol
Mono esters
Vegetable oils and fats basically differ in their
Density ranges
Physical state
Chemical composition
Chemical properties
Salt is added in the kettle during soap manufacture to separate
Soap from lye
Glycerine from lye
The metallic soap
The unsaponified fat from soap
Rotary kiln is not involved in the production of
Cement
Lime from limestone
Slaked lime from quick lime
None of these
Fat splitting catalyst is
CaCO3
ZnO
Al2O3
Fe
Pick out the wrong statement.
Kraft method of pulp manufacture can process all types of fibrous raw materials
Digestion time for bagasse is less than that for wood base materials
Both temperature and pressure in the digestor is less in case of the sulphite method as compared to that in the sulphate method
None of these
Cellulose percentage in bamboo fibre is about
10
20
50
85
Oxygen is produced by fractionation of air using __________ process.
Linde's
Claude's
Either (A) or (B)
None of these
Solvent used for extraction of oil is
Hexane
Methyl ethyl ketone
Furfural
None of these
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
Hard water
Does not affect the lather formation by soap
Is not unfit for drinking purpose
Pollutes the water stream
All (A), (B) and (C)
Phosphate rock is a raw material for the manufacture of
Phosphoric acid
Phosphorous
Superphosphates
All (A), (B) and (C)
Widely used method for the conditioning of boiler feed water is the
Cold lime process
Coagulation
Hot-lime soda process
Sequestration
The process used for the manufacture of ethyl alcohol from molasses is
Distillation
Dehydration
Dehydrogenation
None of these
Producer gas consists mainly of
CO, CO2 N2, H2
CO, H2
H2, CH4
C2H2, CO2, H2
Most widely and commonly used coagulant for the removal of suspended impurities in water is
Bleaching powder
Slaked lime
Alum
Copper sulphate
In primitive days, __________ was being manufactured by Leblanc Process.
Alum
Washing soda
Soda ash
Calcium carbide
Catalyst used during the manufacture of 'Vanaspati Ghee' is
Zinc
Nickel
Platinum
Copper
Type of glass used in optical work is the __________ glass.
Soda-lime
Fibre
Lead
Borosilicate
Sucrose content in the raw juice extracted from sugar cane is about __________ percent.
1 - 2
15 - 20
50 - 60
80 - 85
Trinitro-toluene (TNT) is
Used in glycerine manufacture
An explosive
Used in dye manufacture
None of these
Permanent hardness of water can be removed by
Boiling
Adding Ca(OH)2
Boiling it with Na2CO3
None of these
Nylon-6 as compared to Nylon-66 is having higher
Hardness
Abrasion/resistance
Melting point
None of these