Which of the following is used as a coagulant in water treatment?
Chloramine
Chlorine
Ferrous sulphate
Hydrogen peroxide
Correct Answer :
C. Ferrous sulphate
Related Questions
CaCl(OCl) is the chemical formula of
Hypo
Bleaching powder
Plaster of Paris
Aqua regia
Enzymes are organic catalysts used in the __________ reactions.
Chemical
Biochemical
Photochemical
Electrochemical
Essential oils are usually obtained using
Steam distillation
Extractive distillation
Solvent extraction
Leaching
Soaps remove dirt by
Increasing the surface tension
Decreasing wettability
Supplying hydrophilic group
None of these
Main constituents of natural rubber is
Polystyrene
Polyisoprene
Polybutadiene
Polychlorophrene
Acetone is produced by catalytic dehydrogenation of
Phenol
Naphthalene
Isopropanol
Ethyl benzene
Oil produced by solvent extraction
Has low free fatty acid content
Is odourless
Both (A) & (B)
Neither (A) nor (B)
The catalyst used in the manufacture of DDT (from chloral and chlorobenzene) is
Dilute H2SO4
Oleum
Ultraviolet light
None of these
Thermosetting plastic materials
Can be repeatedly melted
Is useful for melt casting
Cannot be melted after forming
Is useful for spinning
Gun powder uses
Sulphur
Charcoal
Potassium nitrate
All (A), (B), & (C)
Alum is commercially produced from
Gypsum
Feldspar
Galena
Bauxite
Wax is a
Mixture of glycerides
Mixture of esters of polyhydric alcohols excepting glycerine
Liquid at room temperature
Mixture of glycerides of fatty acids
CaO is called
Quick lime
Slaked lime
Limestone
Calcite
Neoprene is the trade name of
Polyurethane
Phenol formaldehyde
Polychlorophrene
Styrene-butadiene rubber
Which of the following is not present in bagasse fibre?
Cellulose
Lignin
Pentogens
None of these
In the manufacture of sulphuric acid from elemental sulphur, the following sequence of major operations is followed:
Furnace → converter → absorber
Furnace → evaporator → absorber
Furnace → converter → evaporator
Converter → furnace → absorber
Massecuite is a terminology used in the __________ industry.
Paint
Oil hydrogenation
Soap
Sugar
Sulphuric acid is mainly used in the __________ industry.
Fertiliser
Steel
Paper
Paint
Contact process of sulphuric acid manufacture
Yields acid of higher concentration than chamber process
Yields acids of lower concentration than chamber process
Is obsolete
Eliminates absorber
Flexible foam (for mattresses) is usually made of
PVC
Silicone
Polyurethanes
Polyamides
Rosin soap is added during paper manufacture to
Impart adhesive properties
Improve opacity
Impart resistance to penetration by liquids
None of these
Type of glass used in optical work is the __________ glass.
Soda-lime
Fibre
Lead
Borosilicate
In nylon-66, the first and second numbers (i.e., 6) respectively designate the number of carbon atoms present in the
Diamine and the ring
Dibasic acid and the ring
Diamine and the dibasic acid
None of these
The major use of butadiene is
As a plasticiser for unsaturated polyester
In the manufacture of synthetic rubber
As an anti-skinning agent in paint
None of these
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 coagulant prior to sedimentation
Phosphoric acid is prepared from
Cryolite
Chalcopyrite
Rock phosphate
None of these
Commercial production of calcium carbide requires limestone and __________ as raw materials.
Coke
Sand
Soda ash
Fuel oil
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
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
Manganese
Diaphragm electrolytic cell as compared to mercury electrolytic cell
Produces 70% NaOH solution
Requires less specific power consumption for the production of chlorine
Requires lesser investment for similar capacity
All (A), (B) and (C)