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Iron forms iron halides salts by reactin...

Iron forms iron halides salts by reacting the metal directly with halogen. `FeI_(3)` does not exist. `FeF_(3)` is white soled inspite of five unpaired electrons with `d^(5)` configuration . `FeCl_(3)` is soluble in water and is used as a mordant in dyeing industry.
Q.`FeCl_(3)` solution added to `K_(4)[Fe(CN)_(6)]` gives A while with `KSCN` gives B. A and B respectively are:

A

`Fe_(3)[Fe(CN)_(6)]_(2), Fe(CNS)_(3)`

B

`Fe_(4)[Fe(CN)_(6)]_(2), KFe(CNS)_(3)`

C

`Fe_(4)[Fe(CN)_(6)]_(3), K_(3)[Fe(CNS)_(6)]`

D

`Fe_(4)[Fe(CN)_(6)]_(3), K_(3)[Fe(SCN)_(6)]`

Text Solution

Verified by Experts

The correct Answer is:
D
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Iron forms iron halides salts by reacting the metal directly with halogen. FeI_(3) does not exist. FeF_(3) is white soled inspite of five unpaired electrons with d^(5) configuration . FeCl_(3) is soluble in water and is used as a mordant in dyeing industry. Q. FeI_(3) does not exist because:

Iron forms iron halides salts by reacting the metal directly with halogen. FeI_(3) does not exist. FeF_(3) is white soled inspite of five unpaired electrons with d^(5) configuration . FeCl_(3) is soluble in water and is used as a mordant in dyeing industry. Q.Anhydrous FeCl_(3) can be prepared by reaction of:

Addition of K_(4)[Fe(CN)_(6)] solution to FeCl_(3) solution gives

which of the following is most effective in coagulating ferric hydroxide sol? a. KCl b. FeCl_(3) c. Na_(2)SO_(4) d. K_(3)[Fe(CN)_(6)]

Two solution (A) containing FeCl_(3(aq.)) and separated by semipermeable membrane sa shown below. If FeCl_(3) solution on reaction with K_(4)[Fe(CN)_(6)] in aqueous solution gives blue colour of Fe_(4)[Fe(CN)_(6)] , the blue colour will be noticed in:

Into iron pyrites in water, air was bubbled for a long time. Green crystal (A) and another substance (B) were produced. 'A' in solution was treated with conc. HNO_(3) and B. The solution was evaporated and crystallized, pale yellow crystals of 'C' was produced . To the solution of A and C, K_(3)[Fe(CN)_(6)] and K_(4)[Fe(CN)_(6)] were added respectively. The colors produced are

Give the electronic configurations of d-orbitals of K_(3)[Fe(CN)_(6)] and K_(3)[FeF_(6)] and explain why these complexes give different colours with the same solution .

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