Question detail
In Halide ions, which answer best matches the evidence for halide ion?
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. The method focus answer keeps the practical method matched to the named analysis technique
- B. A vague answer that names Halide ions without a result or conclusion
- C. A swapped answer that uses a different test from the same unit
- D. A broad answer that describes quantitative measurement instead
Answer
The correct answer is The method focus answer keeps the practical method matched to the named analysis technique. It matches halide ion because the evidence is silver nitrate after acidifying and the expected result is precipitate colour.
Explanation
The correct option is The method focus answer keeps the practical method matched to the named analysis technique. This is correct because silver nitrate after acidifying is the evidence expected for halide ion, and precipitate colour is the result that supports the conclusion. Other options are weaker when they confuse gas tests, flame colours, ion-test precipitates, chromatography evidence, or pure-substance/formulation wording.
Common mistake
Confusing Halide Tests
Students often confuse the halide ion test with the sulfate ion test, leading to incorrect conclusions about the precipitate formed.
Correct this by using the approved Halide ions context: Describe the test for halide ions using silver nitrate solution. Name the correct test or chemistry idea, state the observation accurately, and then give the conclusion supported by that evidence. Do not swap gas tests, flame tests, cation tests, anion tests, chromatography terms, pure substances, and formulations.
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