A blue colouration is not obtained when\

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Professor PC Thomas Classes · Answer

(b) : $2 \mathrm{CuSO}_{4}+\mathrm{K}_{4}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right] \rightarrow \mathrm{Cu}_{2}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]+2 \mathrm{~K}_{2} \mathrm{SO}_{4}$ chocolate ppt.