Anything under test or observation in laboratory is called:
Correct answer: B. System
- A. Surrounding
- B. System
- C. Confined space
- D. None of these
Explanation
In laboratory terminology, a system is the part of the universe under study or observation. Everything outside the system is called the surroundings. Thus, option B correctly defines the substance or process being tested.
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About Analytical Chemistry
Analytical chemistry identifies and measures substances using separation and instrumental methods. Chromatography is studied through stationary and mobile phases, retention and Rf values, while spectroscopy connects absorption of electromagnetic radiation with molecular structure and supports qualitative and quantitative analysis through techniques such as UV-visible and infrared spectroscopy.
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