Qualitative Analysis of Ions - Exam Prep for Students

Qualitative Analysis of Ions - Numerical Applications

Q. In a titration to identify chloride ions, which indicator is commonly used?

Solution

Chromate is used as an indicator in titrations involving chloride ions, as it forms a colored precipitate with silver ions.

Correct Answer: D — Chromate

Q. In UV-Vis spectroscopy, what does a peak at 260 nm typically indicate?

Solution

A peak at 260 nm in UV-Vis spectroscopy typically indicates the presence of nucleic acids, as they absorb light at this wavelength.

Correct Answer: B — Presence of nucleic acids

Q. What is the main advantage of using ion chromatography for qualitative analysis?

Solution

Ion chromatography allows for the separation of multiple ions in a single run, making it efficient for qualitative analysis.

Correct Answer: C — Separation of ions in a single run

Q. What is the primary purpose of using a flame test in qualitative analysis?

Solution

A flame test is used to identify the presence of specific metal ions based on the characteristic colors they emit when heated in a flame.

Correct Answer: B — To identify the presence of specific metal ions

Q. Which of the following ions can be detected using a colorimetric method?

Solution

Iron can be detected using colorimetric methods, as it forms colored complexes with specific reagents.

Correct Answer: C — Iron

Q. Which technique is best suited for separating anions in a mixture?

Solution

Capillary electrophoresis is effective for separating anions based on their charge and size.

Correct Answer: C — Capillary electrophoresis

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