# Which of following is false for salt bridge?

$\begin{array}{1 1}(a)\;\text{It completes inner circuit of cell}\\(b)\;\text{It maintains neutrality in both compartments}\\(c)\;\text{It makes mobility of anion and cation equal}\\(d)\;\text{It contains reacting electrolyte}\end{array}$

It contains non reactive electrolytes to avoid un wanted side reactions and products.
Hence (d) is the correct answer.