Predict the identity of the products at each electrode for the electrolysis of a binary compound in the molten state

Describe the use of a flame test to identify the cations: (a) lithium, ( Li^+ ) (b) sodium, ( Na^+ ) (c) potassium, ( K^+ ) (d) calcium, ( Ca^{2+} ) (e) barium, ( Ba^{2+} ) (f) copper(II), ( Cu^{2+} )