While performing flame test of salt, colour of the P flame observed...

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While performing flame test of salt, colour of the
P flame observed by naked eye is same as the colour of the flame observed through blue glass it indicates-
W
(1) \( \mathrm{Fe}^{2+} \)
(2) \( \mathrm{Cu}^{2+} \)
(3) \( \mathrm{Ni}^{2+} \)
(4) \( \mathrm{Co}^{2+} \)
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