A. Aluminium sulphate
B. Ferrous sulphate
C. Hydrated lime
D. Chloramine
A. Carbonates
B. Bi-carbonates
C. Iron & manganese
D. Arsenic
A. 1
B. 4
C. 8
D. 12
A. Suspended inorganic matter
B. Dissolved solids
C. Floating solids
D. Dissolved gases
A. Dust & mists
B. Smoke & fumes
C. Photochemical smog & soot
D. None of these
A. Idle running
B. Acceleration
C. Cruising
D. Deceleration
A. Respiratory disease (e.g. asthma)
B. Asphyxiation (suffocation) leading to death
C. Retardation in crop growth
D. Damage to building materials like marble
A. Filtration
B. Coagulation
C. Sedimentation
D. Disinfection
A. Ozone
B. Photochemical smog
C. Sulphur dioxide
D. All A., B. & C.
A. 25
B. 50
C. 80
D. 120