How is fluoride removed from drinking water?
A. Reverse osmosis
B. Distillation
C. Freezing water
D. Boiling water
Answer: Option B
A. Reverse osmosis
B. Distillation
C. Freezing water
D. Boiling water
Answer: Option B
Which concentration of ethanol (ethyl alcohol) is the most effective as a disinfectant?
A. 100%
B. 70%
C. 50%
D. 25%
Which of the following method works primarily by denaturing proteins?
A. Ultra filtration
B. Heat
C. UV radiation
D. None of the above
Dioxins and furans are two toxic gaseous pollutants which can be measured by
A. GC - MS
B. TLC
C. ICP - AES
D. AAS
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