Discussion
The membrane cell has displaced the mercury and diaphragm cells in chlor-alkali production because it
Answer: C
Correct answer: consumes less energy and avoids mercury
The membrane cell uses an ion exchange membrane in place of a mercury cathode or an asbestos diaphragm, and it consumes appreciably less electricity per tonne of chlorine while eliminating mercury from the process altogether. The two advantages together, one economic and one environmental, are what displaced the older cells.
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