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Which of the following electrolytes is not preferred in a salt bridge?(a) KCl(b) KNO3(c) NH4NO3(d) NaClThe question was posed to me during an online exam.The above asked question is from Electrochemistry in portion Electrochemistry of Chemistry – Class 12

Answer»

The correct OPTION is (d) NaCl

The BEST explanation: In a salt bridge, the ELECTROLYTES like KCl, KNO3 or NH4NO3 are preferred because their ions have almost EQUAL transport number, viz., 0.5, i.e., they move with almost the same speed when an electric current flows through them.



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