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Instead of graphite, nickel anode can't ...

Instead of graphite, nickel anode can't be used in Dow's process because

A

Graphite is inert to `Cl_(2)`

B

At high temperature `Ni` gets vapourized

C

`Ni` is a corrosive metal

D

`Ni` attacks `Cl_(2)` to produce `NiCl_(2)`

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