Question

$1L$ $\frac{M}{10}$ $Ba(Mn{O}_4{)}_2$ in acidic medium can be oxidised completely with $\frac{1}{6}L$ of $x$ $M$ ferric oxalate. The value of $x$ is :

• A. $1M$
• B. $2M$
• C. $3M$
• D. $4M$

Answer 1

Answer: (A)

$1M$

$10e^{-}+2Mn{O}_4^{⊝}\to 2M{n}^{2+}(n=5)$
Eq of $Mn{O}_4^{⊝}\equiv$ Eq of $F{e}_2(C_2{O}_4{)}_3$
$(n=5)$ $(n=6)$
$1L\times \frac{M}{10}\times 10=\frac{1}{6}L\times 6\times x$
$\therefore x=1M$