Question detail
In Metal hydroxide precipitate tests, which answer best matches the evidence for metal ion test?
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 presence of a gas
- B. The presence of a metal ion
- C. The solution is acidic
- D. The solution is neutral
Answer
The correct answer is The presence of a metal ion. It matches metal ion test because the evidence is precipitate observation and the expected result is cation identity.
Explanation
The correct option is The presence of a metal ion. This is correct because precipitate observation is the evidence expected for metal ion test, and cation identity 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 Sodium Hydroxide Tests
Students often confuse the results of sodium hydroxide tests for different metal ions, such as assuming all produce a white precipitate.
Correct this by using the approved Metal hydroxide precipitate tests context: Describe how sodium hydroxide solution can be used to test for some metal ions. 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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