Neoprene is the trade name of
Polyurethane
Phenol formaldehyde
Polychlorophrene
Styrene-butadiene rubber
Correct Answer :
C. Polychlorophrene
Related Questions
Helium is produced on commercial scale from
Air
Natural gas
Coke oven gas
None of these
__________ is used as a flux in the smelting of copper ore like chalcopyrite.
Coke breeze
Lime powder
Silica/quartz
Dolomite
The most widely used coagulant for removing suspended impurities from water is
Bleaching powder
Chlorine
Calcium sulphate
Alum
Chemical name of Grignard reagent is
Sodium thiosulphate
Ethyl magnesium chloride
Sodium sulphite
Sodium bicarbonate
Exothermic condensation reaction of monochlorobenzene with chloral in presence of 20% oleum as catalyst produces DDT. The reaction temperature is maintained at __________ °C.
15-30
90-100
250-300
< 0
Nylon-6 is a
Polyamide
Thermosetting resin
Polyester
None of these
Molasses is the starting material for the production of
Alcohol
Essential oil
Fatty acids
Massecuite
The metallic aluminium is obtained from pure alumina in the presence of fused cryolite by
Electrolysis
Electrolytic reduction
Electrolytic oxidation
None of these
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
Penicillin is made employing __________ fermentation process.
Continuous
Aerobic batch
Anaerobic batch
None of these
Nicotine is
A volatile alkaloid
Obtained by treating by-products of the tobacco processing industry
Both (A) and (B)
Neither (A) nor (B)
Pasteurisation of milk means
Removal of fatty and albuminous substance from it
Killing of organisms present in it by heating it at controlled temperature without changing its natural characteristics
Inhibiting the growth of micro-organisms without killing them
None of these
Sodium carbonate (soda ash) is not used in the manufacture of
Fire extinguishers
Sugar
Baking powder
Detergents
Solvay process is not used for the manufacture of potassium carbonate, because of the reason that potassium bicarbonate
Is prone to thermal decomposition
Has high water solubility and is unstable
Is soluble in ammonium chloride and potassium chloride solution
All (A), (B) and (C)
Vegetable oils and fats basically differ in their
Density ranges
Physical state
Chemical composition
Chemical properties
Which of the following is the purest form of water out of the following?
Underground water
Rain water
Well water
Lake water
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)
Grignard reagent is chemically known as
Ethyl magnesium chloride
Methyl magnesium chloride
Dichlorophenol
Monochloroacetic acid
Ethyl alcohol cannot be produced
From waste sulphite substrate of paper mills
By Esterification and hydrolysis of ethylene
From molasses
None of these
Hydrazine is largely used
As a starting material for 'hypo'
In photographic industry
As rocket fuel
In printing industry
Which of the following processes can remove both temporary as well as permanent hardness of water?
Filtration
Boiling
Distillation
None of these
Blue vitriol is chemically
Copper sulphate
Ferrous sulphate
Copper nitrate
Aluminium sulphate
__________ of rubber decreases after its vulcanisation.
Resistance to the action of organic solvent
Tackiness
Maximum service temperature
Tensile strength
Oxygen is produced by fractionation of air using __________ process.
Linde's
Claude's
Either (A) or (B)
None of these
A 'unit process' is exemplified by the
Distillation
Hydrogenation of oils
Absorption
Humidification
Phthalic anhydride is used
In making PVC
As plasticisers
In insecticides manufacture
For making nylon-6
Reaction of ethylene glycol and dimethyl terephthalate (DMT) produces
Nylon-6
Dacron
Polyester
PVC
P.T.F.E. (Poly tetra fluoro ethylene) is commercially known as
Bakelite
Neoprene
Teflon
Nylon-66
A substance produced by a living organism and capable of anti-microbial activity is called a/an
Antibiotic
Antiseptic
Disinfectant
None of these
SO2 is bubbled through hot sugar cane juice to
Act as an acidifying agent
Increase its concentration
Increase the amount of molasses
Increase the crystal size