Infective bacteria in water is killed by the _____________ process?

A. HF
B. SO2
C. H2S
D. Both B. & C.

A. Dermatitis (skin disorder)
B. Cancer
C. Asphyxiation (suffocation)
D. Asthma

A. I-131
B. Sr-90
C. Au-198
D. Ra-226

A. Roentgen
B. Decibel
C. Hertz
D. None of these

A. Fumes
B. Mists
C. Smoke
D. Aerosols

A. Alum
B. Bleaching powder
C. Activated carbon
D. Copper sulphate