MCQ
The iron salt used in blue prints is
- A$FeC_2O_4$
- ✓$Fe_2(C_2O_4)_3$
- C$K_4Fe(CN)_6$
- D$FeSO_4$
✓
Answer
Correct option: B.
$Fe_2(C_2O_4)_3$
b
$2CrO_4^{2-} +2H^+ \to Cr_2O_7^{2-} +H_2O$
$2CrO_4^{2-} +2H^+ \to Cr_2O_7^{2-} +H_2O$
$Cr_2O_7^{2-} +2OH^- \to 2CrO_4^{2-} +H_2O$
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