Question

If a compound is formed between X (a metal with valency 2) and Y (a non-metal with valency 3) is melted and an electric current is passed through the molten compound the element X will be obtained _________ and Y at the __________ of the electrolytic cell.

FOR 60 POINTS

Answer 1

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ANSWER

The compound formed between X with valency 2 and Y with valency 3 is X

3

Y

2

.

In electrolysis of molten compound,

At anode: oxidation happens

Y

−3

→Y+3e

−

At cathode: reduction happens

X

+2

+2e

−

→X

The element X will be obtained at the cathode.

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