JEE MAIN - Chemistry (2024 - 30th January Evening Shift - No. 22)
Number of metal ions characterized by flame test among the following is ________.
$$\mathrm{Sr}^{2+}, \mathrm{Ba}^{2+}, \mathrm{Ca}^{2+}, \mathrm{Cu}^{2+}, \mathrm{Zn}^{2+}, \mathrm{Co}^{2+}, \mathrm{Fe}^{2+}$$
Answer
4
Explanation
All the following metal ions will respond to flame test.
$$\mathrm{Sr}^{2+}, \mathrm{Ba}^{2+}, \mathrm{Ca}^{2+}, \mathrm{Cu}^{2+}$$
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