Q. In the flame test of a mixture of salts, a green flame with blue centre was observed. Which one of the following cations may be present?
Solution:
Ion
Colour of the flame
A
$Cu^{2+}$
green flame with blue centre
B
$Sr^{2+}$
Crimson Red
C
$Ba^{2+}$
Apple green
| Ion | Colour of the flame | |
|---|---|---|
| A | $Cu^{2+}$ | green flame with blue centre |
| B | $Sr^{2+}$ | Crimson Red |
| C | $Ba^{2+}$ | Apple green |