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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$(A)$ The $M ^{3+} / M ^{2+}$ reduction potential for iron is greater than manganese
$(B)$ The higher oxidation states of first row $d$ block elements get stabilized by oxide ion.
$(C)$ Aqueous solution of $Cr ^{2+}$ can liberate hydrogen from dilute acid.
$(D)$ Magnetic moment of $V ^{2+}$ is observed between $4.4-5.2\,BM$
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