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TS EAMCET · Chemistry · General Organic Chemistry

Sodium fusion extract of aniline when heated with ferrous sulphate solution and then acidified with concentrated \(\mathrm{H}_2 \mathrm{SO}_4\) from which of the following complexes?

  1. A \(\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{4-}\)
  2. B \(\mathrm{Fe}_4\left[\mathrm{Fe}(\mathrm{CN})_6\right]_3 \cdot x \mathrm{H}_2 \mathrm{O}\)
  3. C \([\mathrm{Fe}(\mathrm{SCN})]^{2+}\)
  4. D \(\left[\mathrm{Fe}(\mathrm{CN})_5 \mathrm{NOS}\right]^{4-}\)
Verified Solution

Answer & Solution

Correct Answer

(B) \(\mathrm{Fe}_4\left[\mathrm{Fe}(\mathrm{CN})_6\right]_3 \cdot x \mathrm{H}_2 \mathrm{O}\)

Step-by-step Solution

Detailed explanation

The carbon and nitrogen present in the organic compound of fusion with sodium metal give sodium cyanide \((\mathrm{NaCN})\) soluble in water. This is converted into sodium ferrocyanide by the addition of sufficient quantity of ferrous sulphate. Ferric ions generated during the…