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Question

A compound which during electrolysis in its molten state, liberates a reddish brown gas at the anode is _________.

A
sodium chloride
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B
copper[II] oxide
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C
copper[II] sulphate
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D
lead[II] bromide
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Solution

The correct option is C lead[II] bromide
Electrolysis of molten Lead bromide,
At anode:
2BrBr2(g) reddish brown gas
at cathode:
Pb+2+2ePb
due to these ions and reactions, lead bromide conducts electricity.

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