For detection of sulphur in an organic compound sodium nitroprusside is added to the sodium extract. A…

For detection of sulphur in an organic compound sodium nitroprusside is added to the sodium extract. A violet colour is obtained due to formation of
  1. $\mathrm{Fe}(\mathrm{CN})_{2}$
  2. $\mathrm{K}_{3} \mathrm{Fe}(\mathrm{CN})_{5} \mathrm{NS}$
  3. $\mathrm{Na}_{4}\left[\mathrm{Fe}(\mathrm{CN})_{5} \mathrm{NOS}ight]$
  4. $\mathrm{Na}_{4} \mathrm{Fe}(\mathrm{CN})_{6}$

Solution

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Asked in: JEE-TOPICTESTS-CHEMISTRY

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