A) calomel
B) corrosive sublimate
C) agar-agar paste
D) \[{{H}_{2}}O\]
Correct Answer: C
Solution :
Salt bridge, a U shaped tube contains a gel permeated with a solution of an inert electrolyte such as\[N{{a}_{2}}S{{O}_{4}}\] (agar - agar paste)
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