A) \[N{{a}_{3}}Fe{{(CN)}_{6}}\]
B) \[N{{a}_{3}}[Fe{{(CN)}_{5}}NOS]\]
C) \[Fe{{(CNS)}_{3}}\]
D) None of these
Correct Answer: B
Solution :
(i) \[Fe{{(CNS)}_{3}}\]is red in colour and is formed when both N and S are present in organic compound (ii)\[\underset{\text{compound}}{\mathop{\underset{\text{from}\,\text{organic}}{\mathop{\text{N}{{\text{a}}_{\text{2}}}\text{S}}}\,}}\,\text{+}\,\underset{\text{nitroprusside}}{\mathop{\underset{\text{sodium}}{\mathop{\text{N}{{\text{a}}_{\text{2}}}\text{ }\!\![\!\!\text{ Fe(CN}{{\text{)}}_{\text{5}}}\text{NO }\!\!]\!\!\text{ }}}\,}}\,\xrightarrow{{}}\] \[\underset{\text{violet}\,\text{colour}}{\mathop{\text{ }\!\![\!\!\text{ N}{{\text{a}}_{\text{3}}}\text{Fe(CN}{{\text{)}}_{\text{5}}}\text{NOS }\!\!]\!\!\text{ }}}\,\]
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