Chemical Environmental Engineering

A. Dissolved oxygen content
B. Biological oxygen demand
C. Vapor pressure
D. All A., B. and C.

A. Phenol and cyanide
B. Chlorine
C. Alkalis
D. Suspended solids

A. Wet scrubber
B. Bag filter
C. Electrostatic precipitators
D. Dust catcher

A. Aerobic
B. Pathogenic
C. Anaerobic
D. Non-pathogenic

A. 10
B. 90
C. 800
D. 750

A. 0.002
B. 0.2
C. 1.2
D. 4.8

A. Carbon dioxide
B. Toluene
C. Carbon disulphide
D. Acetaldehyde

A. Grit chamber
B. Detritus tank
C. Trickling filter
D. Skimming tank

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. Respiratory & lung disease
B. Reduction in plant’s productivity owing to acid rain
C. Corrosion of building materials
D. All A., B. and C.