In laboratory investigations, the identification of unknowns typically involves: Response:

The correct answer is C. Comparing test results to known standards or reference materials. Comparing test results to known standards or reference materials is the cornerstone of scientific identification - it grounds conclusions in objective, reproducible evidence rather than assumption. Option A (guessing from experience) is unscientific and unreliable; personal…

Question

In laboratory investigations, the identification of unknowns typically involves:

Response:

Options

AGuessing based on previous experience
BUsing a single test method for identification
CComparing test results to known standards or reference materials
DConsulting a psychic

How the community answered

(27 responses)

A
7% (2)
B
4% (1)
C
74% (20)
D
15% (4)

Explanation

Comparing test results to known standards or reference materials is the cornerstone of scientific identification - it grounds conclusions in objective, reproducible evidence rather than assumption. Option A (guessing from experience) is unscientific and unreliable; personal intuition introduces bias and cannot be replicated or verified. Option B fails because a single test is rarely definitive - unknown substances often share properties, so multiple tests compared against known standards are required to rule out alternatives. Option D is obviously non-scientific and has no place in a laboratory setting.

Memory tip: Think of it as a "mugshot lineup" - you compare the unknown's "profile" (test results) against known references, just like matching a suspect to a photo on file. No match, no identification.

Community Discussion

No community discussion yet for this question.

Full CPGP Practice