Chemical Environmental Engineering

A. Turbidity
B. Caustic embrittlement
C. Suspended silica
D. Dissolved oxygen

A. Oxides of sulphur
B. Oxides of nitrogen
C. Carbon monoxide
D. Hydrogen sulphide

A. Use of silencers
B. Green house gases
C. Vibration damping
D. Tree plantation

A. Hydrocarbons
B. Hydrogen fluoride
C. Hydrogen sulphides
D. Nitrogen dioxide

A. 20
B. 100
C. 400
D. 200

A. 90
B. 120
C. 150
D. 180

A. Stratosphere
B. Thermosphere
C. Troposphere
D. Mesosphere

A. Foul smell and taste
B. Iron and manganese
C. Temporary hardness
D. Permanent hardness

A. Thermosphere
B. Stratosphere
C. Troposphere
D. Mesosphere

A. Silica
B. Turbidity
C. Phenol
D. Dissolved oxygen