Hematite
Magnetite
Siderite
Chalcopyrite
A. Hematite
Chamber
Chance
Tromp
Solvay
Increase the rate of absorption
Avoid corrosion
Reduce the cooling water circulation rate
None of these
Colloidal impurities
Dissolved oxygen
Turbidity
Chlorinous taste
Separation of isotopes of uranium from gaseous uranium hexafluoride
Separation of helium from natural gas
Desalination of brackish water to produce potable (drinking) water
Purification of oxygen
Osmosis
Reverse osmosis
Absorption
Adsorption
Dehydration
Reduction
Oxidation
Polymerisation
15
35
55
70
Used for paper making
Used as a cattle feed
Highly acidic in nature
None of these
Soda-lime
Fibre
Lead
Borosilicate
Alum
Limestone
Coke
Quartz
Ca(OH)2
C2H2
CO2
CaCO3
10
25
50
98
Can be repeatedly melted
Is useful for melt casting
Cannot be melted after forming
Is useful for spinning
Reverse osmosis
Sand filter
Lime soda
Permutit
Brine
Chloramines
Sodium bisulphite
Liquid chlorines
50
70
95
80
To produce benzene
To produce phenol formaldehyde
To produce polyester resin
As a plasticiser for unsaturated polyester
Low temperature and low pressure
Low temperature and high pressure
High temperature and low pressure
High temperature and high pressure
5000 to 10000
20000 to 250000
500 to 5000
106 to 109
A metal can be economically extracted from it
It contains ≥ 40% metal
The metal present in it is costly
All (A), (B) and (C)
From waste sulphite substrate of paper mills
By Esterification and hydrolysis of ethylene
From molasses
None of these
Ground-wood
Sulphate
Sulphite
Semi-chemical
Neoprene
Cumene
Gelatin
Mercaptans
Reduce its viscosity
Increase its viscosity
Reduce the variation in its viscosity with temperature
Increase the variation in its viscosity with temperature
Cannot be made from sulphite pulp
Utilises H2SO4, NaOH and CS2 during its manufacture
Cannot yield textile grade fibre
None of these
Low fusion point of ash
High ash content
High sulphur content
None of these
Alumina
Silica
20% oleum
Aluminium chloride
Carbon
Charcoal
Sulphur
Potassium nitrate
Fatty acid content
Degree of unsaturation of the fatty acids present in it
Average molecular weight
Insoluble fatty acid content
Cutting
Fibrillation
Hydration
Strengthening