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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

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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)]

A white substance (A) reacts with dilute H_(2)SO_(4) to produce a colourless suffocating gas (B) and a colourless solution (C )/ The reaction of gas (B) with potassium iodate and starch solution produce a blue colour solution. Aqueous Solution of (A) gives a white precipitate with BaCl_(2) solution which is soluble in dilute HCl . Addition of aqueous NH_(3) or NaOH to (C ) produced first a precipitate which dissolves in excess of the respective reagent to poduced a clear solution. Similarly addition of excess of potassium ferrocyanide to (C ) produced a precipitate (D) which also dissolves in aqeous NaOH giving a clear solution. Identify (A),(B),(C ) and (D ). Write the equation of the reactions involved.

(i) A white solid mixture of two salts containing a common cations in insoluble in water. It dissolves in dilute HCl producing some gases (with effervescence) that turn an acidified dichromate solution gren. After the gases are passed through the acidified dichromate solution, the emerging gas turns baryta water milky. (ii) On treatment with dilute HNO_(3) , the white solid gives a solution which does not directly give a precipitate with a BaCl_(2) solution but gives a white precipitate when warmed with H_(2)O_(2) and then treated with a BaCl_(2) solution. (iii) The solution of the mixture in dilute HCl, when treated with NH_(4)Cl,NH_(4)OH and an Na_(2)HPO_(4) solution, gives a white precipitate. Q. The gases evolved in (i) are:

Light green solution of (A) does not give blue coloured ppt . With K_(4)[Fe(CN)_(4)] but on adding a drop of HNO_(3) blue ppt .(B) appears .However (A) gives blue colour (C ) with K_(4)[Fe(CN)_(6)] Identify (A) if it, also gives white ppt with AgNO 3 ​ solution?

An inorganic halide (A) reacts with water to form two acids (B) and (c). (A) also reacts with NaOH to form two salts (D) and ( E) which remain in solution. The solution gives white precipitate with both AgNO_3 and BaCl_2 solutions respectively. (A) is a useful organic reagent. Identify (A) to ( E) .

An aqueous solution of a white salt A gives a white precipitate B on treatment with dilute HCl in cold condition. B is soluble in boiling water. An aqeous solution of A gives a yellow precipitate on treatment with a solution of K_(2)CrO_(4) . The soda extract of A is acidified with diolute H_(2)SO_(4) , boiled to remove CO_(2) and treated with a freshly prepared solution of FeSO_(4) . concentratd H_(2)SO_(4) is added to the resulting solution. a brownn ring is formed at the junction of the two layers. Q. The salt A is:

An aqueous solution of a white salt A gives a white precipitate B on treatment with dilute HCl in cold condition. B is soluble in boiling water. An aqeous solution of A gives a yellow precipitate on treatment with a solution of K_(2)CrO_(4) . The soda extract of A is acidified with diolute H_(2)SO_(4) , boiled to remove CO_(2) and treated with a freshly prepared solution of FeSO_(4) . concentratd H_(2)SO_(4) is added to the resulting solution. a brownn ring is formed at the junction of the two layers. Q. A solution of A, when treated with NH_(3) , gives:

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