20 mL of 0.02 M K_2 Cr_2 O_7 solution is used for the titration of 10 mL of Fe^2+ solution in the acidic medium. The molarity of Fe^2+ solution is \…

$\displaystyle 20$ mL of $\displaystyle 0.02 \mathrm{M} \mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7$ solution is used for the titration of $\displaystyle 10$ mL of $\displaystyle \mathrm{Fe}^{2+}$ solution in the acidic medium. The molarity of $\displaystyle \mathrm{Fe}^{2+}$ solution is \_\_\_\_ $\displaystyle \times 10^{-2} \mathrm{M}$. (Nearest Integer)