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  4. Na2S+Na2[Fe(CN)5NO] xrightarrow[] purple colour. It is due to

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Q. $ N{{a}_{2}}S+N{{a}_{2}}[Fe{{(CN)}_{5}}NO]\xrightarrow[{}]{{}} $ purple colour. It is due to

JamiaJamia 2012

Solution:

$ N{{a}_{2}}S+\underset{\begin{smallmatrix} sodium\text{ }nitroprusside \\ \,\,\,\,\,\,\,\,solution \end{smallmatrix}}{\mathop{N{{a}_{2}}[Fe{{(CN)}_{5}}NO]}}\, $ $ \xrightarrow[{}]{{}}\underset{\begin{smallmatrix} sodium\text{ }thionitroprusside \\ \,\,\,\,\,\,\,\,\,\,\,\,(purple\text{ }colour) \end{smallmatrix}}{\mathop{N{{a}_{4}}[Fe{{(CN)}_{5}}COS]}}\, $