1.

For extraction of sodium from NaCI, the electrolytic mixture NaCI + Na_(3)AIF_(6) +CaCI_(2) is used. During extraction process, only sodium is deposited on cathode but K and Ca do not because

Answer»

NA is more reactive than K and Ca
Na is less reative then K and Ca
NaCI is less STABLE than `Na_(3)AIF_(6)` and `CaCI_(2)`
the discharge POTENTIAL of `Na^(+)` is less than that of `K^(+)` and `Ca^(2+)` ions

Solution :Lower discharge potential ions deposited first at cathode.


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