10 mL of 0.5 N HCl 30 mL of 0.1 N HNO₃  and75 mL of 0.1 M H₂SO₄ are mixed together. The normality of the resulting solution will be:

According to the given conditions, the normality of the resulting solution can be calculated as,

$N=\frac{10\times 0.5+30\times 0.1+75\times 0.1\times 2}{10+30+75}$

$\mathrm{N}= 0.2 \mathrm{N}$

Thus, the correct option is A.