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A compound which liberates reddish brown...

A compound which liberates reddish brown gas around the anode during electrolysis in its molten state is :

Sodium chloride
Copper (II) oxide
Copper (II) sulphate
Lead (II) bromide

A

Sodium chloride

B

Copper (II) oxide

C

Copper (II) sulphate

D

Lead (II) bromide

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