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Chemistry Question on Solubility Equilibria Of Sparingly Soluble Salts

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?

A

Cu2+Cu^{2+}

B

Sr2+Sr^{2+}

C

Ba2+Ba^{2+}

D

Ca2+Ca^{2+}

Answer

Cu2+Cu^{2+}

Explanation

Solution

Green flame with Blue centre is given by Cupric salts.
Crimson red - Sr2+Sr^{2+ }
Brick red - Ca2+Ca^{2+ }
Green - Ba2+Ba^{2+ }

Hence, the correct option is (A): Cu2+Cu^{2+}