or, $\frac{10 \times 0.05}{1000} \times 5=\frac{10 \times {M}}{1000} \times 2$
$\therefore$ Conc. of oxalic acid solution $=0.125 \,{M}$
$=0.125 \times 126\, {~g} / {L}=15.75 \,{~g} / {L}$
$=1575 \times 10^{-2}\, {~g} / {L}$
(આપેલ પરમણીય દળ $A=64 ; B=40 ; C=32 u$ )