Question detail
Which statement would earn credit for Explain that the sample is acidified with dilute nitric acid before adding silver…?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Identification of ions by chemical and spectroscopic means
Question
- A. To enhance the color of the precipitate
- B. To remove any interfering ions
- C. To increase the solubility of the halide
- D. To change the pH of the solution
Answer
The correct answer is To remove any interfering ions. It matches halide ion because the evidence is silver nitrate after acidifying and the expected result is precipitate colour.
Explanation
The correct option is To remove any interfering ions. The answer stays inside Identification of ions by chemical and spectroscopic means by linking the observation to the conclusion instead of naming a substance without evidence. Other options are weaker when they confuse gas tests, flame colours, ion-test precipitates, chromatography evidence, or pure-substance/formulation wording.
Common mistake
Acidification Step Mistake
Students often forget to acidify the sample with dilute nitric acid before adding silver nitrate solution, leading to incorrect results.
Always remember to acidify the sample with dilute nitric acid first to ensure accurate identification of halide ions.
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