Aqueous solution of `Fe SO_4` gives tests for both `Fe^(2+) and SO_4^(2-)` but after addition of excess of KCN, solution ceases to give test for `Fe^(2+)` . This is due to the formation of:

FeSO_4 on treatment with excess of KCN gives a product that does not give test of Fe^(2+) . The product formed is

Consider the following experiments and answer the questions at the end of it (A) When Fe(CN)_(2) solution is treated with KCN solution species formed no longer gives tests of Fe^(2+) and CN^(Θ) (B) When K_(2)SO_(4) solution is treated with A1_(2)(SO_(4))_(3) solution species formed gives tests of K^(o+),A1^(3+) and SO_(4)^(2-) Species formed in experiment A does not give test of Fe^(2+) and CN^(Θ) it is due to formation of .

Consider the following experiments and answer the questions at the end of it (A) When Fe(CN)_(2) solution is treated with KCN solution species formed no longer gives tests of Fe^(2+) and CN^(Θ) (B) When K_(2)SO_(4) solution is treated with A1_(2)(SO_(4))_(3) solution species formed gives tests of K^(o+),A1^(3+) and SO_(4)^(2-) Species formed in experiment A does not give test of Fe^(2+) and CN^(Θ) it is due to formation of .

Which of the following will not give test for Fe^(3+) ions ?

Which will not give test of Fe^(3+) ions ?

Addition of K_4[Fe(CN)_6] solution to FeCl_3 solution give

Alum in aqueous solution gives positive test for (A) K^(+) (B) Al^(3+) (C) SO_(4)^(2-)

(A) : Aqueous solution of Mohr's salt exhibits the test for NH_4^(+), Fe^(2+) and SO_4^(2-) ions. (R ): Mohr's salt is a double salt .

Alum in aqueous solution gives positive test for (A) K^(+) , (B) Al^(3+) , (C) SO_4^(2-)