Geo-Scientist Prelims 2023 Chemistry Q78: Which of the following statements is/are correct regarding…

Which of the following statements is/are correct regarding indicator electrolyte in the moving boundary method to determine the transport number of an ion ?

1. The anions must be different in both the indicator and principal electrolyte.
2. The cation of the indicator electrolyte should move slower than the cation of the principal electrolyte.
3. The indicator electrolyte should be more dense than the principal electrolyte.

Select the correct answer using the code given below :

1. (a) 1, 2 and 3
2. (b) 1 and 2 only
3. (c) 2 and 3 only
4. (d) 3 only