The aqueous solution of potassium cyanide is mixed with aqueous solution of `F_e(CN)_2` . The resulting solution will give test for

An aqueous solution of potassium gives

When acidified solution of potassium dichromate is shaken with aqueous solution of ferrous sulphate then

When an aqueous solution of potassium chloride is added to an aqueous solution of silver nitrate, a white precipitate is formed. Give the chemical equation of this reaction.

Aqueous solution of carnallite gives positive test for