Hollow cathode lamp is used in
A. UV-VIS spectrophotometer
B. Flame photometer
C. Atomic absorption spectrophotometer
D. Sun photometer
Answer: Option C
A. UV-VIS spectrophotometer
B. Flame photometer
C. Atomic absorption spectrophotometer
D. Sun photometer
Answer: Option C
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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