Question detail
A student is testing metal ion test. Which choice keeps the observation and conclusion correctly linked?
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. No change
- B. Formation of a blue precipitate
- C. Formation of a white precipitate
- D. Formation of a green precipitate
Answer
The correct answer is Formation of a white precipitate. It matches metal ion test because the evidence is precipitate observation and the expected result is cation identity.
Explanation
The correct option is Formation of a white precipitate. The important distinction is that metal ion test must be identified from precipitate observation; answers that swap in a different test or result do not match Metal hydroxide precipitate tests. Other options are weaker when they confuse gas tests, flame colours, ion-test precipitates, chromatography evidence, or pure-substance/formulation wording.
Common mistake
Magnesium Ion Precipitate Confusion
Students often confuse the precipitate formed by magnesium ions with that of calcium ions, thinking both are the same.
Correct this by using the approved Metal hydroxide precipitate tests context: Recall that magnesium ions form a white precipitate with sodium hydroxide. 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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Related practice questions
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