Making oxygen
Producing helium
Mining sulphur
Making nitrogen
C. Mining sulphur
CaO, SiO2, Al2O3
MgO, SiO2, K2O
Al2O3, MgO, Fe2O3
CaO, MgO, K2O
Colour
Turbidity
Bacteria
All (A), (B) and (C)
5
10
20
35
High cost of mercury
High specific gravity of mercury
Non-availability of high purity mercury
Pollution of water stream by mercury
Sodium
Potassium
Both sodium & potassium
Aluminium or calcium
Inferior coke compared to low temperature carbonisation
Less of gases compared to liquid products
Larger quantity of tar compared to low temperature carbonisation
None of these
10
50
80
95
Lead glass
High silica (borosilicate) glass
Photo-sensitive glass
Fibre glass
Lead
Cement
Carbon disulphide
None of these
Make it corrosion resistant
Make glossy surface
Give elasticity & prevent cracking of the film
Increase atmospheric oxidation
Increase the density of cement
Decrease the cement setting rate
Both (A) and (B)
Neither (A) nor (B)
Iron-steam reaction
Electrolysis of water
Steam reforming of naphtha
Its cryogenic separation from coke oven gas
Distillation
Dehydration
Dehydrogenation
None of these
Naturally occuring clay which is capable of exchanging cations
Abrasive material
Catalyst used in shift conversion
None of these
Refractory material
Synthetic resin
Artificial abrasive
Blue pigment
Bakelite
Neoprene
Teflon
Nylon-66
Polybutadiene
Styrene butadiene rubber (SBR)
Polyurethane
Polychlorophrene
1 atm & 100°C
5 atm & 275°C
100 atm & 500°C
50 atm & 1000°C
Na2SO4.10H2O
CaCl(OCl)
CaSO4.H2O
(NH4)2SO4
Lead oxide
Zinc oxide
Zinc sulphide
Cellulosic photographic material
Pyrex
Soda lime
Lead
High silica
High cost
Fragile nature
Easy poisoning tendency
All (A), (B) and (C)
Glucose and glucose
Glucose and fructose
Glucose and galactose
Fructose and galactose
Lead oxide
Silica
Alumina
Soda
Activated clay
Bromine
Chlorine or chlorine dioxide
Magnesium sulphite
Coke oven gas
Blast furnace gas
Producer gas
Water gas (blue gas)
Calcium sulphate
Sodium chloride
Sodium sulphate
Magnesium chloride
Before filtration, reduces the bacterial load on filters
After filtration, combats the corrosiveness of water due to the presence of O2 & CO2
Is to adjust the pH value
All (A), (B) and (C)
H2SO3
H2SO4
H2S2O7
H2SO7
Sand
Bauxite
Quicklime
Calcite