The following solutions were prepared by mixing different volumes of NaOH of HCl different concentrations.
(i) 60 mL \(\frac{M}{10}\) HCl + 40 mL \(\frac{M}{10}\) NaOH
(ii) 55 mL \(\frac{M}{10}\) HCl + 45 mL \(\frac{M}{10}\) NaOH
(ii) 75 mL \(\frac{M}{5}\) HCl + 25 mL \(\frac{M}{5}\) NaOH
(ii) 100 mL \(\frac{M}{10}\) HCl + 100 mL \(\frac{M}{10}\) NaOH
pH of which one of them will be equal to 1?
(a) (iv)
(b) (i)
(c) (ii)
(d) (iii)
