Question detail
In Flame tests, which answer best matches the 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. To measure the temperature of a substance
- B. To identify the presence of specific metal ions
- C. To determine the pH of a solution
- D. To observe the color of a liquid
Answer
The correct answer is To identify the presence of specific metal ions. It matches flame test because the evidence is flame colour and the expected result is metal ion identity.
Explanation
The correct option is To identify the presence of specific metal ions. This is correct because flame colour is the evidence expected for flame test, and metal ion 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
Common Mistake in Flame Tests
Students often confuse the flame color of potassium ions with that of sodium ions, thinking both produce a yellow flame.
Remember that potassium ions produce a lilac flame, while sodium ions produce a yellow flame. Use mnemonic devices or color charts to help differentiate between them.
Related flashcards
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Related practice questions
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