In the shorthand notation for a galvanic cell,a double vertical line (∣∣)represents

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In the shorthand notation for a galvanic cell, a double vertical line (∣∣) represents a salt bridge. A salt bridge is used to allow the flow of ions between the two half-cells to maintain electrical neutrality, and it is shown as a double vertical line (∣∣) in the shorthand notation. Hence, option D is the correct choice. The other options are incorrect because a single phase boundary (∣) is shown as a single vertical line in the notation, a cathode is represented by a symbol such as Pt, and a gas is either written as G or mentioned in the cell diagram.

In the Shorthand Notation for a Galvanic Cell,a Double Vertical