When a solution of a mixture having two inorganic salts was treated with freshly prepared ferrous sulphate in…

Question

When a solution of a mixture having two inorganic salts was treated with freshly prepared ferrous sulphate in acidic medium, a dark brown ring was formed, whereas on treatment with neutral $\text{FeCl}_3$ it gave a deep red colour which disappeared on boiling and a brown-red ppt was formed. The mixture contains:

A
$\mathrm{C_2O_4^{2-}}$ & $\mathrm{NO_3^-}$
B
$\mathrm{SO_3^{2-}}$ & $\mathrm{C_2O_4^{2-}}$
C
$\mathrm{CH_3COO^-}$ & $\mathrm{NO_3^-}$
D
$\mathrm{SO_3^{2-}}$ & $\mathrm{CH_3COO^-}$

Accepted Answer

C. $$\mathrm{CH_3COO^-}$$ & $$\mathrm{NO_3^-}$$

Answer

A. $$\mathrm{C_2O_4^{2-}}$$ & $$\mathrm{NO_3^-}$$

Answer

B. $$\mathrm{SO_3^{2-}}$$ & $$\mathrm{C_2O_4^{2-}}$$

Answer

D. $$\mathrm{SO_3^{2-}}$$ & $$\mathrm{CH_3COO^-}$$

Answer & step-by-step solution

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