A) \[\text{N}{{\text{a}}_{2}}[Fe(NO){{(CN)}_{5}}]\]
B) \[N{{a}_{3}}[Fe(ONS){{(CN)}_{5}}]\]
C) \[N{{a}_{4}}[Fe{{(CN)}_{5}}NOS]\]
D) Both and
Correct Answer: C
Solution :
Sulphur of organic compounds is detected by using sodium nitroprusside. With it sulphur forms a violet colour complex, called sodium thionitroprusside. \[N{{a}_{2}}S+\underset{\text{sodium nitroprusside}}{\mathop{N{{a}_{2}}[Fe{{(CN)}_{5}}NO]}}\,\xrightarrow{{}}\] \[\underset{\text{sodium thionitroprusside}}{\mathop{N{{a}_{4}}[Fe{{(CN)}_{5}}NOS]}}\,\]
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