__________ is used as a flux in the smelting of copper ore like chalcopyrite.
Which is the most suitable dye for synthetic fibres ?
Nitroglycerene absorbed in wood flour, sodium nitrate or ammonium nitrate is commercially used as a controlled explosive called dynamite. The raw material used for its manufacture are glycerene, nitric acid and
Lubricating greases are a mixture of
Chalcopyrite is the main ore of
Basic oxide is absent in __________ glass.
Graphite is a/an
Bordeaux mixture is a/an
The main aim behind cooling the digested chip at the bottom portion of the digestor by injecting cold black liquor is to
Flexible foam (for mattresses) is usually made of
Alcohol content in freshly prepared natural and fortified wine may be respectively around __________ percent.
Setting of plaster of paris is accompanied with
Highly porous refractory bricks are
Which of the following may be viewed as a catalyst in the manufacture of soda ash by Solvay process ?
Phenol formaldehyde is produced by condensation polymerisation. It is also known as
Pick out the wrong statement.
Pick out the wrong statement.
The process involved in converting rubber into a thin sheet or coating it on fabric is called
Detergent is produced by the sulphonation of dodecyl benzene, which is an __________ reaction.
Metallic soap is __________ salt of fatty acids.
The end bleaching agent used to move last traces of colour bodies from the pulp is
Bio-degradable detergents
The most widely used coagulant for removing suspended impurities from water is
Penicillin is separated from fermented broth by
Nylon-6 is a
Silicone is a/an
Nickel is not used as a catalyst in the __________ reaction.
Polymethyl methacrylate (PMMA) is known as
Glycerine is a by-product of the __________ industry.
Fumigant insecticides
High purity nitrogen is used in
Hydrogenation of oil does not
Hydrolysis of sugar is called
Sulphuric acid completely saturated with sulphur trioxide is called
Low temperature carbonisation of coal takes place at __________ °C.
Cation exchanger is regenerated usually with
In contact process, SO3 is absorbed inH2SO4 and not in water, because
Sea water contains about __________ ppm of bromine.
Which allotrope of sulphur is insoluble in carbon disulphide ?
Main constituent of limestone is
__________ is obtained as a by-product in the manufacture of sodium hydroxide using brine.
__________ process is used for producing soda ash.
Bleaching powder (chemically known as calcium chloro hypochlorite) is commercially produced by the action of chlorine on
Enzymes are
Roasting of metallurgical ores is done mainly to
Coloured glass is obtained by mixing of colored salts. Addition of __________ oxide is done to impart greenish blue color to the glass.
One of the steps during refining of cane sugar consists of addition of hydrated lime to the sugar syrup followed by carbonation of the resulting solution. The purpose of this step is to
Which of the following is an endothermic reaction ?
Commercial production of soda ash by Solvay process requires limestone, __________ as raw materials.
Main constituents of cotton fiber is