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Which of the following electrolytes is not preferred in a salt bridge?

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in Chemistry – Class 12 by (188k points)
Which of the following electrolytes is not preferred in a salt bridge?

(a) KCl

(b) KNO3

(c) NH4NO3

(d) NaCl

The question was posed to me during an online exam.

The above asked question is from Electrochemistry in portion Electrochemistry of Chemistry – Class 12

1 Answer

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Best 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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