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. Calcium
- B. Magnesium
- C. Aluminium
- D. Copper(II)
Answer
The correct answer is Calcium. It matches metal ion test because the evidence is precipitate observation and the expected result is cation identity.
Explanation
The correct option is Calcium. 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 Required practical: identifying ions. Other options are weaker when they confuse gas tests, flame colours, ion-test precipitates, chromatography evidence, or pure-substance/formulation wording.
Common mistake
Confusing Precipitate Colors
Students often confuse the colors of precipitates formed by different metal ions when using sodium hydroxide solution.
To fix this, students should memorize the specific colors of precipitates for each metal ion, such as white for aluminum, calcium, and magnesium, and blue for copper(II).
Related flashcards
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Related practice questions
Question 1 of 5
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