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What is the role of ZnCl2 in dry cell?...

What is the role of `ZnCl_2` in dry cell?

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`ZnCl_2` combines with the `NH_3` produced to form the complex salt `[Zn(NH_3)_2Cl_2]` otherwise the pressure developed due to the `NH_3` would crack the seal of the cell.
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