The most insoluble salt of sodium is

1.	The most insoluble salt of sodium is
Answer» `Na_(4)[Fe(CN)_(6)]` `Na_(3)[Fe(CN)_(6)]` `Na[Sb(OH)_(6)]` `Na[Fe(CN_(5))NO].2H_(2)O`. Solution :One of the most insoluble SALT of sodium in WATER is `Na[Sb(OH)_(6)]` or sodium hexahydroantimonate (V). The CORRESPONDING potassium salt is more soluble in water. It is used to detect the PRESENCE of `Na^(+)` ions.

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