`KCl` cannot be used as a salt bridege for the cell
`Cu(s)|CuSO_(4)(aq.)||AgNo_(3)(aq.)|Ag(s)`
because

Options

A. `Cl_(2)` gas is evolved
B. `CuCl_(2)` gets precipitated
C. `SO_(2)` gas is evolved
D. `AgCl` gets precipitated

Answer

C

Explanation

In this notation, the anode (or oxidation half-cell) is always written first on the lect white the cathode (or reduction half-cell) is always written last on the rifht. The other components appear in the order in which we would encounter them in moving form the anode to the cathode. The two electrodes are electrically connected by means of a slat bridge, denoted by two by vertical bars.
The cell terminals are at the extreme ends in this cell notation. and a single cerical bar indicates a phase boundary-sat between a solid terminal and the electrode solution. for example, the zinc electode is a solild while the `Zn^(2+)` ions (form `ZnSO_(4)`) are in solution. thus, we draw a line between `Zn` and `Zn^(2+)` to show the phase boundries. Note that there is also a line between the `ZnSO_(4)` solution and the `KCl` solution in the salt bridge because these two solutions are not mixed physically and therefore constitute two separate phases.