Question

Prussian blue colour is obtained by mixing together an aqueous solution of Fe3+ salt with:

(A) Ferricyanide
(B) Ferrocyanide
(C) Hydrogen cyanide
(D) Sodium cyanide
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Answer 1

:The end-product in the Prussian blue reaction is ferric ferrocyanide, also known as Prussian blue. This reaction is a classic example of a precipitation reaction in which two clear solutions are mixed to form a solid precipitate.The reaction involves the combination of potassium ferrocyanide and a ferric salt, such as ferric chloride or ferric sulfate. The resulting blue solid is insoluble in water and has a characteristic deep blue color. Prussian bluehas many practical applications, including its use as a pigment in paints, dyes, and inks, as well as a dye for textiles. It has also been used as a treatment for radiation exposure and as a diagnostic tool for certain medical conditions.The ability of Prussian blue to selectively absorb certain types of radiation has led to its use in nuclear waste treatment and cleanup efforts. In conclusion, the end-product of the Prussian blue reaction is ferric ferrocyanide, which has a wide range of practical applications in various fields.

Step-by-step explanation:

Answer 2

(B). Ferrocyanide

Step-by-step explanation:

Prussian blue is a blue pigment that is formed by the reaction of an aqueous solution of Fe3+ salt with a solution of ferrocyanide. The reaction is as follows:

`\sf Fe_3+ + 3K_4Fe(CN)_6 \longrightarrow Fe4[Fe(CN)_6]_3`

This reaction produces a complex compound called ferric ferrocyanide, which is the blue pigment that gives Prussian blue its color.

So, The correct answer is (B). Ferrocyanide

The other answer choices are incorrect.

• Ferricyanide (choice A) is the product of the reaction, not the reactant.
• Hydrogen cyanide (choice C) is a poisonous gas that would not produce a blue pigment.
• Sodium cyanide (choice D) is a salt that would react with the
  `\sf Fe^(3+ )`salt to form ferricyanide, but it would not produce Prussian blue by itself.