Which of the following instrument is most suitable to estimate heavy metals from the effluent?
A. Chromatography
B. Atomic absorption spectrophotometer
C. Flame photometer
D. Electrophoresis
Answer: Option B
A. Chromatography
B. Atomic absorption spectrophotometer
C. Flame photometer
D. Electrophoresis
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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