Category: Chemical Environmental Engineering

A. Nitric acid
B. Sulphuric acid
C. Chlor alkali
D. Iron & steel

A. Ozone and iodine
B. Chlorine or its compounds
C. Ultraviolet light for irradiation of water
D. All A., B. & C.

A. 75
B. 95
C. 120
D. 140

A. Petroleum refineries
B. Coal based thermal power plants
C. Pulp and paper plant
D. Metallurgical roasting & smelting plant

A. Simple filtration
B. Oxidation followed by settling & filtration
C. Chemical coagulation
D. Chlorination only

A. Deaeration of feed water
B. Enhancing pH of feed water by adding alkali
C. Feeding sodium sulphite or hydrazine phosphate to the boilers, which combines with oxygen
and prevents corrosion
D. All A., B. and C.

A. 5
B. 50
C. 500
D. 5000

A. Highly
B. Moderately
C. Extremely
D. Very extremely

A. CO2
B. H2
C. SO3
D. N2

A. Nothing but black smoke
B. A combination of smoke and fog
C. A liquid particle resulting from vapor condensation
D. A solid particle e.g. fly-ash