The pH of HCl is 3. Then the pH of NaOH solution having same molar concentration is

pH of HCl= 3 

pH of NaOH =?

For neutralization, $\left[{\mathrm{OH}}^{-}\right]=\left[H^{+}\right]$

${\mathrm{P}}_{\mathrm{A}}^{\mathrm{H}}={\mathrm{P}}_{\mathrm{B}}^{\mathrm{OH}}=3$

$\left[{\mathrm{p}}_{\mathrm{A}}^{\mathrm{H}}:\mathrm{Acids} \mathrm{PH}\right]$

$\left[{\mathrm{P}}_{\mathrm{B}}^{\mathrm{OH}};\mathrm{Bases} \mathrm{POH}\right]$

pH + pOH = 14

pH = 11