**Match the salts with their corresponding n-factors (assuming complete reaction):** <br><br>**Colum — Mole Concept and Some Basic Concepts of Chemistry Chemistry Question
Question
**Match the salts with their corresponding n-factors (assuming complete reaction):** <br><br>**Column I:** <br>(A) $KMnO_4$ (in acidic medium) <br>(B) $K_2Cr_2O_7$ (in acidic medium) <br>(C) $H_2C_2O_4$ (as a reducing agent) <br>(D) $FeC_2O_4$ (oxidized to $Fe^{3+}$ and $CO_2$) <br><br>**Column II:** <br>(P) $n = 5$ <br>(Q) $n = 6$ <br>(R) $n = 2$ <br>(S) $n = 3$
Answer: (A) $\RIGHTARROW$ P <BR>(B) $\RIGHTARROW$ Q <BR>(C) $\RIGHTARROW$ R <BR>(D) $\RIGHTARROW$ S
💡 Solution & Explanation
**(A)** $Mn^{7+} \rightarrow Mn^{2+}$ ($5 e^-$ transfer). <br>**(B)** $Cr_2O_7^{2-} \rightarrow 2Cr^{3+}$ ($6 e^-$ transfer). <br>**(C)** $C_2O_4^{2-} \rightarrow 2CO_2$ ($2 e^-$ transfer). <br>**(D)** $Fe^{2+} \rightarrow Fe^{3+}$ ($1 e^-$) and $C_2O_4^{2-} \rightarrow 2CO_2$ ($2 e^-$). Total $= 1+2=3$.
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