Q. pH value of 0.1N HCl solution is approximately:
a) 10
b) 11
c) 1
d) 2
Correct Answer :
Question from BPSC PT 71, 2025
Correct Answer: c) 1
Explanation:
– HCl is a strong, monoprotic acid, so it dissociates completely: [H+] = concentration of HCl.
– For a monoprotic acid, Normality = Molarity. Thus, 0.1 N HCl = 0.1 M HCl.
– pH = −log10[H+] = −log10(0.1) = 1.
– Therefore, the pH is approximately 1.
