Following solutions were prepared by mixing different volumes of NaOH and HCl of different concentrations:
a. 60 mL `(M)/(10) HCl + 40 mL (M)/(10)` NaOH
b. 55 mL `(M)/(10) HCl + 45 mL (M)/(10)` NaOH
c.75 mL `(M)/(5) HCl + 25 mL (M)/(5)` NaOH
d. 100 mL `(M)/(10) HCl + 100 mL (M)/(10)` NaOH
pH of which one of them will be equal to 1 ?

Options

A. 4
B. 1
C. 2
D. 3

Answer

D