Question detail
For Identification of ions by chemical and spectroscopic means, which option uses the correct Chemical analysis evidence for flame 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. Lithium
- B. Sodium
- C. Calcium
- D. Copper
Answer
The correct answer is Sodium. It matches flame test because the evidence is flame colour and the expected result is metal ion identity.
Explanation
The correct option is Sodium. This response is stronger than the distractors because it keeps the test, observation, and interpretation in the correct order for flame test. Other options are weaker when they confuse gas tests, flame colours, ion-test precipitates, chromatography evidence, or pure-substance/formulation wording.
Common mistake
Colour confusion in flame tests
Students often think that a yellow flame indicates the presence of potassium ions instead of sodium ions.
Remind them that potassium ions give a lilac flame, while sodium ions produce a distinct bright yellow flame.
Related flashcards
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