MCQ
Iron salt used in blue prints is :
- A$FeC_2O_4$
- ✓$Fe_2(C_2O_4)_3$
- C$K_4[Fe(CN)_6]$
- D$K_3[Fe(CN)_6]$
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Reason $(R)$ : Oxygen forms $\mathrm{p} \pi-\mathrm{p} \pi$ multiple bonds with itself and other elements having small size and high electronegativity like $\mathrm{C}, \mathrm{N}$, which is not possible for sulphur.
In the light of the above statements, choose the most appropriate answer from the options given below :