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Which of the following cations can be identified using a flame test? (A) Al^{3+} (B) Cu^{2+} (C) Mg^{2+} (D) Zn^{2+} - HSC - SSCE Chemistry - Question 3 - 2004 - Paper 1
Question 3
Which of the following cations can be identified using a flame test? (A) Al^{3+} (B) Cu^{2+} (C) Mg^{2+} (D) Zn^{2+}
Worked Solution & Example Answer:Which of the following cations can be identified using a flame test? (A) Al^{3+} (B) Cu^{2+} (C) Mg^{2+} (D) Zn^{2+} - HSC - SSCE Chemistry - Question 3 - 2004 - Paper 1
Step 1
Identify Cations for Flame Test
Answer
When conducting a flame test, certain cations produce distinct colors that allow for their identification:
- Al^{3+}: No characteristic flame color.
- Cu^{2+}: Produces a green flame, making it identifiable.
- Mg^{2+}: Does not produce a characteristic flame color.
- Zn^{2+}: No distinct flame color.
Therefore, the only cation that can be identified using a flame test from the options provided is Cu^{2+}.