An organic compound containing both nitrogen and sulphur is fused with an insufficient amount of sodium metal. The resulting sodium fusion extract is then treated with Fe ³⁺ ions. Which of the following correctly identifies the primary sodium salt formed during the fusion and the colour observed upon the addition of Fe ³⁺ ?

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When an organic compound containing both nitrogen and sulphur is fused with an insufficient amount of sodium metal, sodium thiocyanate ( NaSCN ) is formed instead of separate sodium cyanide and sodium sulphide. Na + C + N + S NaSCN Upon addition of Fe ³⁺ ions to the extract, a blood-red colouration is observed due to the formation of the ferrithiocyanate complex, [ Fe ( SCN )]²⁺ . Fe ³⁺ + SCN ⁻ [ Fe ( SCN )]²⁺ If excess sodium were used, the thiocyanate would decompose into cyanide and sulphide, yielding the standa