Which of the following is locating agent?
Correct answer: D. Ninhydrin
- A. H2S
- B. CS2
- C. Rubeanic acid
- D. Ninhydrin
Explanation
Rubeanic acid is a specific locating agent that forms colored complexes with metals like Cu²⁺ and Ni²⁺. It is used to visualize or detect these metal ions in qualitative analysis. Other options are either reagents, solvents, or used for different purposes.
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